Phentermine is a drug that is primarily used for appetite suppressant effects in the treatment of extreme obesity, and you can learn more about its mechanism of action, CSA schedule, various brandnames and more in the complete guide to phentermine.

Despite its frequent use, numerous misconceptions surround this drug, and it’s important to clarify them in order to get the most out of Phentermine.

Everything you ever wanted to know about this drug but may have been afraid to ask is listed, answered, and explained below.

Will Phentermine work for me?

If the doctor prescribed Phentermine, it is because is because they believe it will work for you. Otherwise, they would prescribe something else. A vast majority of patients report improvements after taking the drug, and there is no reason why wouldn’t you become one of them. That being said, you do need to modify your lifestyle, avoid being sedentary and move more while eating healthier food in order to get the most out of Phentermine.

Will Phentermine work for me again?

It’s not uncommon to come across stories where patients described how Phentermine worked for them each time.  Some patients report that their phentermine has lost effectiveness, and they ask how to make phentermine work again. Using the medication multiple times is not a sign of its inefficacy. Phentermine is intended for short-term use only, and your doctor may recommend taking a break after the treatment before starting a new one. Next time around you can still find Phentermine as effective as you did previously.

Will Phentermine cause diarrhea?

Some users may experience diarrhea when taking Phentermine. Diarrhea is listed among the most common side effects of the drug, and it occurs because Phentermine modifies the concentration of specific gut bacteria and enhances gastric motility. In some cases, diarrhea occurs because the body is adapting to the drug. The side effect is temporary and will go away.

Will Phentermine raise blood pressure?

Higher blood pressure is one of the most common side effects of Phentermine. This explains why persons with a history of heart disease are not good candidates for the drug; hypertension increases the risk of heart conditions.

Will Phentermine show on a drug test?

In its nature Phentermine is similar to amphetamine and it can produce a “false positive” result on a urinalysis drug test. Don’t be alarmed! Drug test won’t confirm positive for an amphetamine[i]. Bear in mind that Phentermine will likely show on a urinalysis 4 to 7 days after the last ingestion; this time varies based on the dosage, frequency of use, and your metabolic rate.

Will Phentermine hurt my kidneys?

Phentermine can elevate blood pressure which can, in turn, accelerate the deterioration of kidney function. Kidney-related problems are more expressed in patients who already had a history of kidney diseases prior to the treatment.

Will Phentermine keep me awake?

Some patients do experience insomnia when taking Phentermine. Insomnia usually occurs in the first few weeks of the treatment and tends to go away on its own. If it doesn’t disappear on its own, consult your doctor to see what you can do about it.

Will Phentermine affect my period?

Despite not being listed as a side effect, problems with period do occur in female patients taking Phentermine. These problems include missed periods, late periods, early periods, heavier or prolonged periods, lighter and shorter periods, more severe PMS symptoms and sharper cramps.

Will Phentermine cause constipation?

Some patients may experience constipation which is on the list of side effects of this drug. Phentermine is a stimulant, and it also promotes frequent urination. If you don’t drink more water than your body expels, then you are at risk of dehydration. Inadequate fluid intake can cause bad breath, constipation, and other problems.

Will Phentermine affect thyroid levels?

At this point, no evidence is available about the role of Phentermine in thyroid hormone levels, but it is claimed the drug can increase them. Phentermine may aid management of hypothyroidism by providing energy and supporting weight loss.

Will Phentermine get you high?

Phentermine will not get you high. People who use the drug also report they feel no high or similar effects. Due to the fact that Phentermine is a stimulant drug, some people take dangerously high dosages in order to feel that high. It’s needless to mention that you should never, under no circumstances, do such a thing and put your health in jeopardy.

Will Phentermine give me energy?

Yes, it will. Phentermine is a stimulant and energy boost is one of its important effects. You can use this new energy level to move more and be physically active. Even a walk around the block can do the trick.

Will Phentermine work without exercise?

Phentermine can work without exercise, but that is not the right strategy. After having prescribed Phentermine, your doctor will recommend diet adjustments and exercise routine to follow. The key is to establish a healthy lifestyle so that you continue to lose weight even after the period of Phentermine use is over. If you don’t increase physical activity, then you are at risk of gaining weight after the course of the treatment.

Where can I buy Phentermine online?

You can buy Phentermine only if you have a current doctor’s prescription. Unlike dietary supplements for weight loss, Phentermine is stronger, more tightly regulated, and not available online. It’s not unusual to come across websites that claim you can get Phentermine online without prescription but those are usually fake, or they use different names because it’s difficult for some people to tell the difference between PhentERmine, PhentARmine, and PhentERAmine.

Where is Phentermine legal?

Phentermine can be legally purchased in the United States, Canada, and Australia as well as in some other countries with a doctor’s prescription only. Other countries where Phentermine is available to include Singapore, Malaysia, Philippines, Hong Kong, South Africa, Mexico, Israel, and New Zealand.

How is Phentermine metabolized?

Gastrointestinal tract absorbs Phentermine, and it reaches peak concentration in the blood in 3 to 4 hours. The half-life of Phentermine is 25 hours which is, basically, the time it takes for the body to metabolize half of the dosage. The drug is metabolized in the liver, or it is expelled unchanged via urine.

Where is Phentermine manufactured?

Phentermine tablets are manufactured in North America. Due to the popularity of the drug, other countries also manufacture and provide the medication, but if you live in the US or Canada then your pills are made on this continent, they aren’t imported. The manufacturer information is provided on the packaging as well as their location. Some brands like Teva are headquartered in Israel or other countries, but their drugs are still produced in the North American labs.

Where is Phentermine sold?

Bearing in mind Phentermine is a prescription drug, doctors usually prescribe and sell it to their patients. Weight loss clinics can also provide the drug to their clients and patients. That being said, the prescription is more expensive in clinics than it would be at the doctor’s office. It’s also possible to get refills at Walgreens, Costco, etc.

Where is Phentermine banned?

Although Phentermine is available in most countries, some nations banned it. The drug is banned in many European countries including in the United Kingdom over fears it could affect heart health.

Who can take Phentermine and who cannot take it?

Phentermine is suitable for obese patients only, i.e., for persons whose BMI is 30. In the presence of other weight-related conditions such as type 2 diabetes, a doctor may prescribe Phentermine to a patient whose BMI is up to 27. The drug shouldn’t be given to patients younger than 16, pregnant and breastfeeding mothers, and patients who are allergic to it. You shouldn’t take Phentermine if you have a history of heart disease, severe or uncontrolled blood pressure, overactive thyroid, glaucoma, pulmonary hypertension and if you have a history of drug and alcohol abuse.

Who makes Phentermine 37.5mg?

Manufacturers that make Phentermine 37.5 mg include KVK Tech Inc, Teva Pharmaceuticals, Qualitest Pharmaceuticals, Actavis USA, Able Laboratories Inc, Actavis Totowa LLC.

Who prescribes Phentermine in Dallas?

Phentermine in Dallas is prescribed by doctors mainly, but patients can get their prescriptions in weight loss clinics too.

Which Phentermine brand works best?

Adipex-P is the most popular brand of Phentermine and patients report it works. Other brands that are considered effective include Suprenza, Obynix. Manufacturers Lannett and KVK Tech Inc are considered reliable too.

Which is better Phentermine or Contrave?

Contrave is a weight loss drug that, like Phentermine, requires a prescription. While Phentermine is a single drug, Contrave is a combination of bupropion and naltrexone. Both drugs work in a similar manner, but Contrave doesn’t have a similar nature as amphetamine. Each of these drugs has its own perks and cons, but Phentermine may be more suitable for short-term use while Contrave can also be used to maintain weight after slimming down.

Which is better Phentermine or Phendimetrazine?

Phendimetrazine and Phentermine are stimulant drugs meaning they help patients lose weight in a similar manner. Phentermine may be a better option because there are different brands and varieties, so they come at a more affordable price.

Which is better Phentermine or Qsymia?

Phentermine is a single drug while Qsymia is a combination of phentermine and topiramate. While the first drug is used mainly to promote weight loss in obese patients, the latter helps them slim down and maintain their weight loss. Both drugs are useful, but doctors may prescribe Phentermine first for short-term to kick start weight loss and then Qsymia for weight management later.

Which is better Phentermine or Diethylpropion?

Diethylpropion is a stimulant that is similar in nature to amphetamine. It works in an equal manner as Phentermine, so it’s impossible not to wonder which one is more effective. Data on this subject is limited, but a study from the Pharmatherapeutica found that patients from Phentermine group experienced a more significant weight loss compared to their diethylpropion counterparts[ii].

Which is better Phentermine or Belviq?

Belviq (lorcaserin) is an FDA-approved weight loss medication. Unlike Belviq, Phentermine is designed for limited, short-term use. Phentermine has a more affordable price. At the same time, it helps users lose a greater amount of weight in a shorter period of time. Both medications work in a similar manner, they have similarities and differences, so it’s always useful to consult your doctor regarding the best option for you.

Which is better Phentermine or HCG?

Human chorionic gonadotropin (HCG) is a hormone produced by placenta after implantation which is why HCG injections are used to induce ovulation and treat infertility in women. Today, these injections and HCG diet are used for weight loss purposes too. Although it’s commonly believed that HCG is better, the reality may be different. At this point, a vast majority of studies found no evidence that HCG promotes weight loss[iii].

Which products contain Phentermine?

Phentermine is found in products such as Adipex-P, Lomaira, Fastin, Phentercot, Qsymia, Suprenza, and Ionamin. The drug may appear under other names in different countries.

Which is better Phentermine or Tenuate?

Both Phentermine and Tenuate are popular weight loss products, and it would be difficult to choose one that is better than the other. The reason is simple; both drugs are meant for shorter-term consumption only, they act on the central nervous system to release chemicals to suppress appetite. In many cases patients who find one of these drugs ineffective find success with the other. However, some studies have shown that Phentermine could be more effective, but your doctor can prescribe the drug he or she deems more effective for your condition and weight.

Can Phentermine cause UTI?

In some cases yes, the drug can cause UTI. Difficult urination and urinary tract infection are on the list of infrequent and less severe side effects of Phentermine.

Can Phentermine stop working?

Every drug can stop working, and Phentermine is not an exception. This effect can occur due to repeated use or if a patient doesn’t follow treatment instructions. For a greater efficacy of Phentermine try to increase physical activity levels and adjust your diet appropriately. If you feel that the drug has stopped working entirely consult your doctor about the issue and they will recommend the best strategy to turn things around again.

Can Phentermine make you tired?

The drug itself is supposed to boost your energy levels, but it is not uncommon for some patients to feel tired. Tiredness can be a result of some side effects such as insomnia. If you don’t get enough sleep, you’re bound to deal with fatigue. Another factor is a “paradoxical reaction,” a term that refers to those cases when stimulants (in this case Phentermine) induce fatigue and weakness instead of energy and other effects they were supposed to bring. Avoid drinking too much coffee to beat drowsiness. Take a short nap instead, if you’re in a position to do so.

Can Phentermine cause heartburn?

Some patients may experience acid reflux when taking Phentermine, but not on a daily basis.

Can Phentermine cause heart problems?

The drug may harm heart valves, i.e., they may not be able to close properly and start to leak. One of the serious side effects of Phentermine is hypertension or high blood pressure which is a major risk factor for cardiovascular events.

Can Phentermine increase fertility?

By helping patients lose weight Phentermine could be a factor in their improved fertility. However, this doesn’t mean Phentermine is a cure for infertility struggles or that you should use it for this purpose. A major culprit for infertility issues is obesity so you may want to consult your doctor to see whether slimming down with Phentermine could increase your odds of having a baby.

Can Phentermine cause seizures?

There is a possibility that Phentermine can contribute to seizures by causing a dangerously high blood pressure. This belongs among the uncommon side effects of the drug.

Can Phentermine go bad?

Every drug has its shelf life and Phentermine is not an exception. Typically shelf life of this drug is 3 to 5 years depending on the brand or dosage. Shelf life is indicated by an expiration date you can see on the pack. The expiration date corresponds to about 90% of the medication, but you shouldn’t take it before consulting your doctor.

Can Phentermine cause vertigo?

Yes, vertigo or dizziness is a side effect of Phentermine. In some patients, vertigo can be severe while in others it isn’t.

Can Phentermine cause hives?

Yes, it can. Hives or welts are a side effect of Phentermine, and they can also occur due to the allergic reaction to the drug. The intensity of hives may vary from mild to severe, but it becomes even worse if you scratch. Call your doctor if you notice hives after taking Phentermine.

Can Phentermine cause cancer?

No evidence has been published on the likelihood of Phentermine to cause cancer. At the same time, cancer is not on the list of side effects and complications caused by the drug.

Can Phentermine help with depression?

Phentermine may help patients with depression in more ways than one. The drug promotes the release of important neurotransmitters, and it also increases neurophysiological arousal. This is particularly important because low neurophysiological arousal is a causative factor in many depressive patients. Phentermine also requires a healthy diet intake which is important for depression management too.

Can Phentermine cause a stroke?

Back in 1993, a study showed that Phentermine use was associated with stroke[iv], but insufficient evidence is available on this subject. Your doctor may not prescribe Phentermine if you’re in a high-risk group for stroke.

Can Phentermine cause hyperthyroidism?

Since Phentermine may raise thyroid levels, it’s important to inform your doctor if you have hyperthyroidism. While your physician may still prescribe the drug, they may monitor you closer.

Can Phentermine make you hungry?

Hunger is not an intended effect of Phentermine. The drug suppresses your appetite, but it makes you feel full for longer. If you feel hungry on a daily basis, you should consult your doctor.

Can Phentermine make you dizzy?

Yes, it can. In fact, dizziness is on the list of side effects associated with the use of Phentermine.

Can Phentermine cause hair loss?

Even though hair loss is not listed as a symptom of Phentermine, it is known occur around three months into the treatment. Patients experience hair loss due to changes in their diet, exercise, and other lifestyle modifications that coupled with weight loss change hormone levels. This is not a normal reaction to the drug though, and most patients don’t experience hair loss.

What is Phentermine made of?

Phentermine is made of the same-named ingredient that acts on your brain to release specific chemicals to help you lose weight. Unlike over-the-counter products, Phentermine doesn’t contain herbs, plants, and other similar ingredients.

What should I eat while taking Phentermine?

When taking Phentermine, you should consume a diet rich in fiber, protein, vegetables, and other healthy nutrients. On the other hand, you should avoid or lower intake of heavily processed and refined foods, junk food, sugar, soda, and other unhealthy foods. Remember, a healthy diet is vital for Phentermine’s results.

Phentermine what does it look like?

Phentermine comes in the forms of tablets and capsules. Tablets are usually white with blue specks, but there are also blueish tablets with blue dots as well. Capsules come in a variety of colors ranging from yellow to blue.

Phentermine what time of day to take?

Phentermine is taken either in a single dose or three times a day. When taken as a single dose it is highly recommended to take the pill on an empty stomach, but it can also be taken 1-2 hours after breakfast. On the other hand, when taken three times a day a patient is required to take the pill about 30 minutes before meals.

What is the highest dose of Phentermine?

The highest dosage of Phentermine is 37.5 mg. The drug is also available at lower dosages such as 30 mg and 15 mg, but there is also 8 mg and 18.57 mg, according to

What medications cannot be used with Phentermine?

Phentermine interacts with a multitude of medications including Adderall, Vyvanse, Focalin, Zoloft, among others.

What should I do when Phentermine stops working?

When Phentermine stops working you should ask your doctor about the next step. Your doctor will most likely prescribe some other weight loss medication. You should also evaluate your diet, physical activity levels, and other lifestyle habits. In order for Phentermine to work properly, its use needs to be accompanied by healthier lifestyle adjustments.

Can I take Phentermine when pregnant?

No, you shouldn’t take the drug when you’re pregnant. As a pregnant woman, your priority is to focus on your health and wellbeing of the baby. While some studies have shown Phentermine is safe in the first trimester[v] this isn’t an area where you should take risks. If you’re concerned about your weight in pregnancy strive to be more active and adjust your diet.

Phentermine when does it start working?

Results depend on your metabolic rate, dosage, and strength of Phentermine. Patients who are taking 37.5 mg Phentermine may notice first results within a week, but regular intake of the drug for a recommended time frame is needed in order to experience better effects.

Can I take Phentermine when trying to conceive?

No, you should not take Phentermine when you’re trying to conceive. While weight loss can increase the likelihood of pregnancy, Phentermine has a similar nature to amphetamine, and it is not know how it can affect the fetus or baby. That is why the best thing to do is to avoid using the drug when trying to get pregnant too.

Can I take Phentermine while breastfeeding?

Although the use of Phentermine during breastfeeding isn’t studied, it is possible the drug can pass into breast milk, and the baby can be exposed during nursing. The best thing to do is to avoid using Phentermine while breastfeeding or to consult your healthcare provider before you decide anything on your own.

When should I stop taking Phentermine?

Phentermine is a short-term weight loss solution, and it’s not something you can use for years. After the course of treatment is over (usually 4-6 weeks), your doctor may recommend taking a pause before continuing treatment, if necessary. You should never stop taking Phentermine on your own without consulting the healthcare provider. If you experience side effects, inform your doctor, and they’ll tell you whether it’s okay to stop or just lower the dose.

Why am I still hungry while taking Phentermine?

Don’t worry; it’s normal to feel hungry during the first few days when you just start taking Phentermine. The reason why this happens is that your body is still adjusting to the pharmacological action of the drug. Remember, you also need to change your diet habits while on the drug and beyond. If you find that Phentermine hasn’t suppressed your appetite after the first few days have passed, ask your doctor what could be behind this effect.

How Does Phentermine work?

Phentermine works by stimulating the release of brain chemicals that curb a patient’s appetite. The drug also accelerates metabolism that promotes fat burning. People who take Phentermine eat less than they did before and are able to adopt healthier diet habits. A growing body of evidence confirms that short-term use of Phentermine is effective for weight loss[vi]. The drug also aids in lowering cholesterol, blood pressure, and other risk factors associated with obesity.

How long can I take Phentermine?

Even though the drugs can be taken safely for 12 weeks, most doctors recommend patients to take Phentermine for 4 to 6 weeks. Duration of use depends on a patient’s reaction to the drug.

Are Phentermine and Adderall similar?

Adderall is a combination of amphetamine and dextroamphetamine, and it is primarily used to treat ADHD and narcolepsy. Both Adderall and Phentermine stimulate central nervous system which is why people often think they do same things. Unlike Phentermine which is approved by FDA to treat weight loss, Adderall is not approved for this purpose.

Are Phentermine and Phendimetrazine the same?

Although both drugs are stimulants and suppress appetite, they are not the same thing. Phentermine is a stimulant while phendimetrazine is a sympathomimetic anime and is taken 2 to 3 times a day. Phentermine is usually taken 1 to 3 times a day.

Are Phentermine and Adipex the same thing?

Phentermine is both a name of the drug and the main ingredient in tablet and capsules. On the other hand, Adipex-P is a brand name for a weight loss drug containing Phentermine ingredient. The strength, mechanism of action, and other factors of Adipex-P are identical to those associated with both brand and generic Phentermine. Adipex tends to be more expensive than Phentermine.

Are Phentermine and Adderall the same?

No, they are not the same. While Phentermine is a single drug, Adderall is a combination of amphetamine and dextroamphetamine. Their uses differ as well; Adderall is prescribed for ADHD and narcolepsy while Phentermine is prescribed for weight loss.

Are Phentermine capsules better than tablets?

There isn’t much of a difference between capsules and tablets of Phentermine. Both a tablet and a capsule contain just phentermine hydrochloride as an active ingredient, and they function in an identical manner.

Are Phentermine capsules time-released?

Yes, they are time-released.

Are Phentermine side effects permanent?

In most cases, a patient stops experiencing side effects after discontinuing intake of Phentermine. For milder adverse reactions the doctor may just lower the dosage. However, some side effects are long-term, and they include insomnia, constipation, and pulmonary hypertension.

Is Phentermine safe?

Phentermine is considered a highly effective weight loss drug, but it comes with a number of side effects. Some adverse reactions include chest pain, dizziness, fainting, headache, jaw pain, swelling in feet and legs, low libido, sweating, trouble breathing, muscle weakness, inability to achieve erection, stool, dry mouth, bad breath, hives, skin rash, unpleasant taste, skin redness, and many others.

Is Phentermine addictive?

Phentermine’s similarity to amphetamine is a major source for concern as many people are afraid of becoming addicted to the drug. Due to its stimulant nature, Phentermine is habit-forming, but it’s not that common for patients to get addicted. In fact, addiction would occur only in cases when a patient doesn’t follow dosage instructions and decides to misuse the drug. A study published in the International Journal of Obesity found that even long-term use of Phentermine didn’t cause addiction in patients. The treatment didn’t induce drug craving, a hallmark sign of addiction[vii].

Are Phentermine and Ritalin the same?

Both Phentermine and Ritalin are central nervous system stimulants, but they are not the same thing. Phentermine is a sympathomimetic anime that mainly acts on neurotransmitter norepinephrine. On the flip side, Ritalin is an amphetamine stimulant that functions by enhancing levels of dopamine and noradrenaline.  While Phentermine is used for weight loss, Ritalin is prescribed for ADHD and narcolepsy.

Is Phentermine legal?

Phentermine is a controlled substance, but it is legal. You can only get the drug with a doctor’s prescription and in pharmacies. While the drug itself is legal, getting it without a doctor’s prescription is considered illegal, and you should never do it.

Does Phentermine work without Topiramate?

A combination of Phentermine and Topiramate is prescribed for patients who need to slim down and manage their weight[viii]. Phentermine works on its own to help patients lose weight, but it is not prescribed by itself for management.

Can I take Phentermine on an empty stomach?

Of course! When taken in a dosage of one pill a day it is strongly recommended to take Phentermine on an empty stomach about 30 to 40 minutes before breakfast.

Does Phentermine have withdrawal symptoms?

Stopping the treatment abruptly may cause withdrawal symptoms such as weight gain, fatigue, drug cravings, low mood, among others. The best thing to do is to follow treatment instructions thoroughly. You’ll be happy to know that most patients don’t experience withdrawal symptoms once they’re done with Phentermine.

Can I take Phentermine with coffee?

When taking Phentermine, you should decrease your coffee intake. The reason is that both Phentermine and coffee act as stimulants so the goal of lowered caffeine intake is to avoid side effects.

Phentermine with Metformin?

Metformin is the first-line medication for treatment of type 2 diabetes. Moderate interaction exists between Phentermine and Metformin. Consult your physician before using these two drugs at the same time.

Phentermine with Prozac?

Prozac is a brand name for fluoxetine, an antidepressant from SSRI class. Studies show that fluoxetine potentiates the anorectic and dopamine effects of Phentermine[ix]. However, the clinical importance of these findings is still not certain, so you still need to consult a healthcare provider to check whether it’s safe to use Phentermine with Prozac.

Can I get Phentermine without insurance?

Medicaid is not required to cover weight loss medications, but some states do add coverage for patients who meet certain criteria. Basically, in most states, Phentermine isn’t covered by insurance in the first place.

Phentermine with Wellbutrin?

Wellbutrin is a drug that is specifically created to act as an antidepressant and aid treatment of depression. At this point, no studies have shown that Phentermine interacts with Wellbutrin, but you shouldn’t consume these two drugs together before asking your doctor whether it’s safe to do so.

Can I take Phentermine if I drink alcohol?

Alcohol increases the risk of Phentermine’s side effects, and it worsens the severity of existing ones. When taking the drug, you should strive to stay away from alcohol and alcoholic beverages.

Phentermine with caffeine?

While one should never consume two stimulants together, it appears that Phentermine and caffeine aren’t specifically contraindicated. Of course, their effects vary from one person to another. The best thing to do is to lower caffeine intake if you can’t imagine going through a day without a cup of coffee.

Phentermine with Xanax?

Xanax is a brand name for alprazolam, a potent tranquilizer. This drug should not be taken at the same time with Phentermine due to their counterintuitive effects. Xanax is a tranquilizer while Phentermine is a stimulant. Phentermine could make your anxiety worse in this case while Xanax might lower your inhibitions and make you eat foods you usually wouldn’t.

Phentermine with Adderall?

If you’re taking Adderall, you should inform your doctor before getting a prescription for Phentermine. The same thing applies vice versa. Although at this point no interactions between Phentermine and Adderall were recorded in a scientific study it doesn’t mean they are impossible. Since both drugs are stimulants, it’s not advised to take them at the same time.

Phentermine with Keto OS?

Keto diet has become popular lately, but it is not the wisest choice for people who take Phentermine. Why? It’s simple; this diet is still considered controversial, and evidence on its efficacy is scarce. At the same time, Keto is not a sustainable dietary pattern and is way too restrictive. As a result, it prevents patients to develop healthy eating habits that are necessary for obtaining maximum results from Phentermine.

Phentermine with Sertraline?

Sertraline usually sold under the name Zoloft is an antidepressant from the SSRI class. Since Sertraline is antidepressant and Phentermine is a stimulant, to avoid any interactions you should check with your doctor to see whether it’s okay to use them together. Making these decisions on your own isn’t recommended.

Phentermine with PCOS?

Phentermine could be beneficial for women with PCOS mainly because the condition is associated with weight gain that is difficult to get rid of. If you have PCOS, ask your healthcare provider whether you can also benefit from Phentermine.

Phentermine with Cymbalta?

Cymbalta is a brand name for duloxetine, a medication used to treat depression, anxiety, fibromyalgia, and neuropathic pain. Phentermine and Cymbalta should not be taken together. Each of these drugs increases the toxicity of the other and enhances the risk of side effects.

Phentermine with SSRI?

Ideally, you should not use Phentermine with SSRI unless it is approved by your healthcare provider.

Phentermine with Effexor?

Effexor is a brand name for venlafaxine, a widely used antidepressant. Phentermine may interact with Effexor. Some reports say a combination of these medications may induce psychosis, but more research is needed to confirm or disprove these claims[x]. If you’re taking one of these drugs, let your doctor know in order to learn whether it’s safe for you to use the other.

Phentermine with anesthesia?

Phentermine may interact with anesthesia. It is generally recommended to stop taking the drug about seven days prior to the surgery[xi].

Phentermine tolerance?

Even though Phentermine is a potent drug, some patients may gradually develop tolerance. This is particularly the case in patients who have used the drug before as well. Drug tolerance occurs when the medication is, and its effects aren’t at the level they used to be. Bear in mind that tolerance is not the same thing as addiction.

Can I take Phentermine for chronic fatigue?

Phentermine is formulated to support weight loss mainly. However, some patients do take the drug to alleviate chronic fatigue due to its stimulant benefits. You shouldn’t use it for this purpose without consulting your doctor, but you need to bear in mind Phentermine is meant for short-term use only.

Is Phentermine like Ritalin?

Phentermine has a lot of similarities to Ritalin although they are different drugs that are prescribed for different purposes. What they have in common is that both Phentermine and Ritalin are central nervous system stimulants. Ritalin is not used for weight loss nor should you use it to slim down.

Is Phentermine like Vyvanse?

Vyvanse is a brand name for lisdexamfetamine, a medication that is used for the treatment of ADHD. Although both drugs stimulate the central nervous system, they have a different purpose.

Is Phentermine the same as Fen-Phen?

Phentermine is not the same thing as Fen-Phen. Fen-Phen was a drug that combined Fenfluramine and Phentermine, and it was used as an anti-obesity treatment. The pill was considered powerful because it contained two anorectics. In 1997, Fen-Phen was withdrawn from the market due to health risks. Basically, Phentermine is an individual drug, and it was only a part of Fen-Phen which also contained another drug too.

Is Phentermine like Ephedrine?

Ephedrine is a medication and a stimulant, and it is well-known as the first herbal supplement banned by the FDA in 2004[xii]. This means ephedrine is not available in over-the-counter form anymore. Although both Ephedrine and Phentermine are stimulants, the latter is used for appetite suppressing effects mainly. On the flip side, Ephedrine burns fat and exhibits a respiratory effect by improving lung volume and breathing capacity.

Phentermine vs. Adderall?

Phentermine was created with a purpose to stimulate the central nervous system and suppress appetite to help patients slim down. Adderall also stimulates the central nervous system, but it is formulated to treat ADHD. Basically, these two drugs have a different purpose. Although some people may use Adderall for weight loss, it is not the drug’s initial or recommended use.

Phentermine vs. Adderall reddit?

Reddit users usually wonder whether it’s safe to take Phentermine and Adderall at the same time. You should never do so without consulting your doctor first.

Phentermine vs. Phentermine?

Phentermine and Phentramine aren’t two ways to spell the same thing. While Phentermine is a prescription-only medication for weight loss, Phentramine is a herbal supplement available without a prescription.

Phentermine vs. Phentarmine?

Phentarmine is not the same thing as Phentermine, but their similar name is a major source of confusion. Phentarmine is a dietary supplement, but its similarity to Phentermine name makes people believe they can get this powerful drug without prescription although it’s not true. Despite the fact that Phentarmine is marketed as a natural Phentermine it doesn’t contain phentermine hydrochloride as an ingredient but features DHEA, carnitine, and others.

Phentermine vs. Vyvanse?

Both Phentermine and Vyvanse are central nervous system stimulants. Their difference is that Phentermine was specifically formulated to promote weight loss while Vyvanse is intended for the treatment of ADHD and should not be used for weight management purposes.

Phentermine vs. Ritalin?

Phentermine is an FDA-approved weight loss drug that is primarily used to treat obesity in people who also have high cholesterol, diabetes, high blood pressure, among others. On the other hand, Ritalin is a prescription medication whose primary purpose is to address symptoms of ADHD and narcolepsy. Ritalin is not formulated for weight loss and its use for this purpose is illegal.

Phentermine vs. Contrave?

Both Phentermine and Contrave are used for weight loss purposes. Phentermine contains an active ingredient phentermine hydrochloride which stimulates central nervous system and suppresses appetite subsequently. Contrave is a combination of two drugs bupropion and naltrexone to suppress cravings. Both ingredients in Contrave stimulate the nervous system, but it is not clear how they work together. While Phentermine was approved by FDA ages ago, Contrave got its approval only a few years back.

Phentermine vs. Tenuate?

The primary point of difference between Phentermine and Tenuate is the chemical composition. You see, Tenuate contains diethylpropion, not Phentermine. Both medications have a same mechanism of action and are mainly intended for short-term use. Besides chemical composition, they also differ in the form or appearance. Phentermine is available in the form of tablets and colorful capsules while Tenuate only comes in tablet form.

Phentermine vs. Clenbuterol?

Clenbuterol is a steroid-type of the drug that is used for a wide array of purposes including weight loss. The drug stimulates both the heart and the central nervous system, and it works in a similar manner as amphetamine. In some countries including the USA, Australia, and most of Europe Clenbuterol is only legal for use in horses and treatment of asthma. On the other hand, Phentermine isn’t used for such purposes. Clenbuterol works faster, and the results are noticeable within a few weeks which is why athletes use it. On the other hand, Phentermine is not a steroid, FDA-approved for weight loss.

Phentermine vs. Wellbutrin?

Unlike Phentermine, Wellbutrin was specifically created to treat depression. Some people may lose weight with Wellbutrin, but others can gain weight. The bottom line is that if you want to lose weight, you’ll be better off consulting your doctor about Phentermine rather than using Wellbutrin if you don’t have depression.

Phentermine vs. HCG?

Despite the fact that both Phentermine and HCG are used for weight loss they function in a different fashion. While Phentermine acts on central nervous system HCG targets abnormal fat stored around hips, thighs, upper arms, and abdominal region. Patients who take HCG also eat less. Since HCG targets abnormal fat only it is considered safer for overall health compared to Phentermine. In addition, HCG was not approved by FDA for the treatment of weight loss while Phentermine is.

Phentermine vs. Fen-Phen?

Although it’s easy to think Phentermine and Fen-Phen are basically the same and have no differences, the reality is different. Fen-Phen was a combination of drugs that included Phentermine. On the flip side, Phentermine is a single drug that you can use to lose weight. Fen-Phen was banned in the late 90s because it was considered harmful for users’ health. If you find Fen-Phen online make sure you don’t buy it because it’s probably fake and unsafe, the drug is not being produced anymore.

Phentermine vs. Alli?

Alli is a 60 mg over-the-counter version of Orlistat, a 120 mg prescription drug. Although both drugs support weight loss, they don’t have a similar mechanism of action. Phentermine reduces appetite by affecting hunger and satiety centers in a patient’s brain. On the other hand, Alli decreases absorption of fats in the gastrointestinal tract.

Phentermine vs. Phen375?

Phen375 is a dietary supplement formulated for weight loss, and it doesn’t require a prescription like Phentermine. It is considered a milder replacement for Phentermine and a solution for people who want to lose weight without asking their doctor to prescribe pills. That being said, Phentermine and Phen375 have a different mechanism of action. While Phentermine stimulates the central nervous system to release chemicals and suppress appetite, Phen375 promises to burn fat, accelerate metabolism, and promote weight loss by promoting thermogenesis. Phentermine works faster than Phen375.

Phentermine vs. Ephedra?

Ephedra is a plant that has been used in traditional Chinese medicine for more than 2000 years. Both Phentermine and ephedra are stimulants that promote weight loss, but the latter is banned in the US while Phentermine is not. Ephedra was available in the form of dietary supplements thus requiring no prescription while Phentermine comes with doctor’s prescription. The reason why Ephedra was banned is due to its serious side effects. While Phentermine, like other medications, can induce adverse reactions they are not as common or severe as those caused by ephedra.

Phentermine vs. Phenylethylamine?

Phenylethylamine (PEA) is an organic compound that is widely known for its nootropic effects. It works in a similar way as Phentermine, i.e., PEA stimulates the release of brain chemicals. Differences between two drugs are numerous including the fact that Phentermine is approved by FDA and it acts on the release of chemicals that suppress the appetite while PEA improves mood along with appetite control. Additionally, PEA is a naturally-occurring compound, and it’s an uncontrolled substance while Phentermine is a controlled substance.

Phentermine vs. Belviq?

Belviq is, just like Phentermine, prescribed for the treatment of obesity. Although they work in a similar manner, these drugs have many differences. Phentermine promotes the release of neurotransmitters and chemicals that suppress appetite. Belviq activates 5-HT2C receptors in anorexigenic neurons in the hypothalamus. In most cases, Phentermine dosing regimen is selected individually based on the patient’s condition, weight, and tolerability. On the other hand, dosage regimen with Belviq is the same for everyone.

Phentermine vs. Orlistat?

Orlistat is a drug that is specifically formulated to treat obesity. Both drugs are available with a doctor’s prescription only. While both Phentermine and Orlistat support weight loss their mechanisms of action are different. Orlistat works by slowing down or blocking the action of enzymes that affect absorption of fat in the gastrointestinal tract. As a result, the body excretes up to 30% of fats consumed with food in their unchanged form. On the flip side, Phentermine functions by stimulating the brain to produce chemicals that reduce appetite.

Phentermine vs. Phen Caps?

Phen Caps are a dietary supplement and an alternative to Phentermine. Unlike Phentermine, you don’t need a prescription to buy Phen Caps. Although both are supposed to promote weight loss, they are not the same. The primary point of difference is that Phen Caps don’t really contain Phentermine hydrochloride. Instead, they contain eight active ingredients that are considered natural.

Phentermine vs. Dexedrine?

Dexedrine is a brand name of dextroamphetamine, a widely-prescribed stimulant for treatment of ADD. The drug can also be prescribed for weight loss. The primary difference between Phentermine and Dexedrine is that the first drug suppresses appetite and is FDA-approved for weight loss. On the flip side, the latter curbs cravings, but it is not approved by the FDA for this use. Although both drugs act on central nervous system Phentermine was specifically created for weight loss while Dexedrine was not.

Phentermine pharmacology and mechanism of action?

The primary constituent of this pill is phentermine hydrochloride which is an odorless, white, crystalline, and hygroscopic water-soluble powder. The ingredient works by stimulating the central nervous system in order to suppress appetite. The drug promotes the release of epinephrine and adrenaline outside of the brain, thus resulting in the breakdown of stored, stubborn fat[xiii]. As a result of Phentermine’s mechanism of action, the patient consumes a lower amount of food, doesn’t overeat, and resists cravings. Besides weight loss, Phentermine also works to speed up the body’s metabolic rate.

What do various Phentermine pills look like?

Not all Phentermine pills look the same. Their appearance is based on the manufacturer, the imprint (a letter and number etched on the pill or capsule), strength, and other factors. In most cases Phentermine pills look like:

Can I buy Phentermine pills on Amazon?

Phentermine is a prescription medication meaning one can’t simply purchase it on Amazon or some other similar website. That being said, a simple search on Amazon displays tons of results featuring products with similar names, but are formulated as dietary supplements. You should never mistake them for the real Phentermine.

Can I buy Phentermine over-the-counter?

Generally speaking, one can’t buy Phentermine over-the-counter because the drug is available with a doctor’s prescription only. However, the medication has a long history of misuse and is, actually, easy to get[xiv] which is why both doctors and authorities are concerned. It’s always better to consult your doctor and get a prescription before you start looking for ways to avoid healthcare provider. Your doctor will inform you whether Phentermine is safe for you, especially if you have an underlying health condition.

Is it possible to overdose on Phentermine?

Yes, it is. A patient can overdose on Phentermine when taking excessively high dosages. Phentermine overdose can induce symptoms such as panic, hallucinations, confusion, hostile behavior, nausea, stomach cramps, irregular heartbeat, just to name a few. The overdose of this drug can be fatal. You should always take prescribed dosage and avoid adjusting it on your own.

Phentermine mechanism of action?

Phentermine belongs to a class of drugs called anorectics whose primary objective is to diminish or suppress a patient’s appetite to promote weight loss. The drug stimulates the release of brain chemicals that manipulate the mind and curb the appetite, so a patient feels full, eats less, and avoids overeating or frequent snacking. A patient’s calorie intake is decreased significantly due to the pill’s ability to lower absorption of fat and starch by the body, so they aren’t metabolized.

How does Phentermine affect metabolism?

Phentermine acts on your metabolism through its appetite suppressing effects. The drug burns body fat faster and accelerates the metabolic rate to provide significant weight loss. In order to support Phentermine’s effects on metabolism, it is necessary to consume a healthy diet.


s the ideal meal plan with Phentermine?

Your doctor will provide detailed exercise and diet guidelines that you should follow when taking Phentermine. The ideal meal plan is not restrictive or limited. A patient is required to employ common-sense food choices and consume a well-balanced diet. Consumption of protein, fiber, whole grain, and fruits and vegetables is recommended. On the flip side, you should lower the intake of processed junk food, sugar, and simple carbs. In addition, patients should stay away from alcohol because it increases the risk of side effects and aggravates the existing adverse reactions.

Does Phentermine affect libido?

Some men and women may notice their sexual desire decreased with the use of Phentermine. In fact, loss of libido is listed as a side effect of the drug[xv]. Phentermine stimulates your body to work more, suppress your appetite, and slim down. This is because the body is revving for fight or flight through a chemical manner. In other words, your body is busy working even when you’re relaxing, so it’s difficult to get into the “mood” to have sex. Loss of sexual desire is a common side effect of many diet pills because relaxation is important for libido. As your body is preoccupied and working to help you slim down it explains why your sex drive slowly diminishes. As you’re losing weight successfully, you may notice your libido is improving. That’s because overweight or obesity can also affect libido.

Phentermine LCI 1445?

Pills that feature LCI 1445 imprint are, basically, Phentermine 37.5 mg. These pills are manufactured by a brand called Lannett Company Inc. You can easily recognize LCI 1445 pills thanks to their oval or elliptical shape, blueish color, and blue dots. Doctor’s prescription is necessary for this pill because it is classified as a Scheduled four controlled substance.

Phentermine K25?

The imprint K25 on a pill refers to Phentermine 37.5 mg supplied by KVK Tech Inc. This is an oval-shaped or elliptical tablet. The K25 tablets are white and contain little blue dots. Of course, you need a prescription to get this drug.

Phentermine K29?

Pills featuring K29 imprint are Phentermine 37.5 mg supplied by KVK Tech Inc. These capsules are blue and white with a black imprint. You need a prescription for these capsules, just like with other forms of Phentermine pills.

Phentermine K26?

Pills with K26 imprint are, actually, Phentermine 15 mg and they are supplied by KVK Tech Inc. These pills are in the form of capsules where one half is colored in grey and the other in yellow. The black K26 imprint is easily noticed on each capsule. Bearing in mind K26 is classified as a Schedule 4 controlled substance you need a prescription to get it.

Phentermine K27?

Phentermine K27 is a sign for Phentermine 30 mg pills manufactured by KVK Tech Inc. The pills come in the form of yellow capsules. Each capsule has a black K27 imprint. Just like other Phentermine pills, K27 also requires a prescription.

Phentermine K28?

The Phentermine K28 imprint refers to Phentermine 30 mg capsules supplied by KVK Tech Inc. These capsules are half clear and half blue and are available for persons with prescriptions only. Inside the capsules, Phentermine appears to be in a somewhat granulated instead of powdered form.

Phentermine E16?

Phentermine E16 is, basically, Phentermine 37.5 mg. Pills with this imprint are manufactured by Epic Pharma LLC. Tablets are shaped like capsules, white, and they contain little blue specks or dots. Phentermine E16 is classified as a Schedule 4 controlled substance under the Controlled Substance Act (CSA) and is available only with doctor’s prescription.

Does Phentermine cause kidney pain?

If you have reduced kidney function, the doctor will most likely monitor you closely after prescribing Phentermine. It’s not uncommon for patients to report pain in the kidney area, but it doesn’t necessarily mean the drug affected your kidneys. The pain could be due to the amount of water you should be consuming versus the quantity you expel. Phentermine stimulates the body to urinate more frequently, so you need to up the water intake. The impact of the drug itself on kidneys isn’t examined thoroughly.

The first case implicating Phentermine in drug-induced acute interstitial nephritis, a major cause of renal failure, was reported in the February 2017 issue of BMJ Case Reports


. To conclude, some patients might experience pain in the kidney area due to inadequate water intake compared to the amount expelled via urine. Make sure you consult your doctor if you experience sharp pain, especially if you have a history of kidney problems though.

Does Phentermine cause joint pain?

Some patients who are taking Phentermine may experience joint pain and weakness in their muscles and joints. As a result, it becomes difficult to stand up, sit down, walk, and perform other movements you did with ease. This is considered a serious side effect and not a normal reaction to the drug so inform your doctor if you experience joint pain.

What are

“Phentermine jitters”?

The term “Phentermine jitters” refers to nervousness that people often feel when they take the drug. This happens due to its similarity to amphetamine and stimulant mechanism of action. Some patients may feel jittery, hyperactive, and stimulated.

Does Phentermine cause jaw pain?

In some cases, Phentermine can cause jaw pain. In fact, jaw pain is on the list of serious side effects associated with this drug. This is not a normal reaction to the medication, and you should tell your doctor right away if you experience jaw pain.

What are common Phentermine drug interactions?

You should always inform the doctor about other medications you’re taking, including those bought over-the-counter and supplements. Phentermine, like other medications, interacts with other drugs including:

Phentermine itchy scalp?

Patients who use Phentermine may experience itchiness in the scalp area, but not all of them do. At this point, it is not clear whether the medication causes itchy scalp or patients develop this problem due to anxiety and nervousness. The itchiness worsens if you scratch or rub your scalp. Bump-like sores may also develop on the head and cause pain, especially when a person uses shampoo or a conditioner. Remember, not all patients develop this side effects but if you do then make sure to contact the healthcare provider.

Phentermine hives?

Itchy skin and hives are side effects of Phentermine but are less common compared to others. This side effect usually stems from an allergic reaction to the drug. Mild cases include itchiness only while more severe cases include skin rash and hives. If you experience this side effect, you should consult your doctor immediately. Your doctor will either prescribe a different drug or a lower dosage of Phentermine.

Phentermine hot flashes?

Some patients do report Phentermine causes hot flashes and excessive sweating. Of course, this doesn’t mean you’d experience the same side effects. If you have hot flashes due to Phentermine, then it’s a good idea to consult your doctor.

Phentermine high Reddit?

Numerous Reddit users have reported they got a bottle of Phentermine to “get high” because it is similar to amphetamine. Note that Phentermine is not formulated nor intended to be used as a tool to get high and one would need to take dangerously high dosage to achieve that effect. In order to stay safe and get the maximum out of Phentermine, take prescribed dosage only and avoid using it for other purposes rather than weight loss. Phentermine is not an experimental and recreational drug.

Phentermine Houston?

Houston residents can get prescription for Phentermine at a number of locations including Houston Weight Loss Center, Memorial Weight Loss Clinic, Houston Medical Wellness/Weight Loss Center, Image Weight Loss Centers, Clinic 45, Z Med Clinic, Katy Weight Loss Center, Get Well Clinic Family Health & Weight Loss, and others. Of course, you can also schedule an appointment to see your doctor.

Is Phentermine harmful to my gallbladder?

Being obese is a major risk factor for gallbladder injury or disease. The list of potential side effects of Phentermine doesn’t include gallbladder problems. Some patients did report gallbladder injury, but it’s difficult to tell whether it was caused by the drug or their weight itself. At this point, there are no studies confirming the harmful effects of Phentermine on gallbladder function.

Phentermine E16?

The imprint E16 indicates a Phentermine pill of 37.5mg strength. The pill is white, shaped like a capsule, and features little blue dots or specks. Like other forms of Phentermine, E16 is available with a doctor’s prescription only. The pill is supplied by Epic Pharma LLC.

Does Phentermine cause edema?

Some patients may experience edema or swelling in legs, ankles, and in some cases their feet due to Phentermine. Edema is on the list of side effects of this drug. However, this doesn’t mean that every person who takes Phentermine will develop edema too.

Is Phentermine FDA-approved?

Yes, the drug has FDA’s seal of approval. In fact, Phentermine was first approved by the FDA in 1959. Back then the drug was used in combination with fenfluramine and dexfenfluramine, but in 1997 these particular drugs were taken off the market due to FDA’s request after multiple cases of abnormal heart valve findings were reported. After that, Phentermine was available on its own, but it’s also useful to mention that FDA approved Phentermine with other drugs too.

What BMI do I need to qualify for Phentermine?

Generally, Phentermine is only prescribed to patients who are considered obese. In order to qualify for Phentermine prescription, your BMI score needs to be 30. If you only want to slim down a few pounds to fit into your favorite dress or to get a flat stomach, Phentermine is not the right solution. The drug is prescribed only to patients with excessive weight gain. To calculate your BMI click here.

Does Phentermine cause body odor?

Although body odor is not on the list of side effects of common Phentermine pills some patients do report this adverse reaction. This could be down to excessive sweating, but body odor is harmless. It’s highly unlikely you’ll deal with this symptom throughout the course of Phentermine intake.

Does Phentermine cause bipolar disorder?

The relationship between Phentermine and bipolar disorder is a complicated subject. The action of this drug is similar to that of bupropion, a widely used antidepressant. Prescription information on Phentermine pills may include euphoria and dysphoria as potential side effects. The drug may affect mood. Some case studies indicated the use of Phentermine might cause manic and hypomanic episodes in patients with bipolar disorder, but more studies are needed to learn more about this subject. While Phentermine may not cause bipolar, it has the potential to cause bipolar-like symptoms, especially in patients who have the disorder[xvii]. Make sure you consult your doctor if you have concerns about this subject, but remember that many bipolar patients take Phentermine and feel no adverse effects.

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[iii] Lijesen GK, Theeuwen I, Assendelft WJ, Van Der Wal G. The effect of human chorionic gonadotropin (HCG) in the treatment of obesity by means of the Simeons therapy: a criteria-based meta-analysis. British Journal of Clinical Pharmacology. 1995;40(3):237-243.

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[xi] Stephens LC, Katz SG. Phentermine and anaesthesia. Anaesthesia and Intensive Care 2005 Aug;33(4):525-7

[xii] FDA prohibits sales of dietary supplements containing ephedra, FDA

[xiii] Phentermine, Pub Chem Open Chemistry Database

[xiv] Top-selling diet drug Phentermine is cheap and easy to get, NY Times

[xv] Phentermine side effects, Drugs



Shao EX, Wilson GJ, Ranganathan D. Phentermine induced acute interstitial nephritis. BMJ Case Reports 2017. Doi: 10.1136/bcr-2017-219452

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