Your Diet While Using Phentermine – What to Include and What to Avoid?

by Ahmed Zayed, MD on April 13, 2024
Last updated on April 13, 2024

Losing weight doesn’t have to feel like a nightmare, especially with Phentermine in your corner! But let’s get one thing straight: this isn’t about any “magic pill”. We’re talking about the top weight loss drug in the United States, and how you play a big part in its success.

sliced fruits on a plate

Phentermine is meant to be combined with a kick-ass diet and regular workouts. But what exactly should your diet plan include and most importantly what food and drink choices should it exclude to achieve the ultimate weight loss results? In the following article, we will share some of the basic facts about Phentermine, only to continue explaining more about how your diet plan should look like during your treatment with Phentermine.

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Phentermine – Know the basics about this amazing weight loss drug

Phentermine, also known and sold under the brand name of Adipex, is one of the most popular and most commonly used weight loss drugs in the United States. It was back in 1959 when Phentermine first hit the market. Since then, this weight loss drug underwent through some improvements to become what we know it today to be – an amazing weight loss drug. Doctors prescribe Phentermine to cases of overweight and obesity where the BMI (Body Mass Index) is over 30 (1).

Phentermine, combined with a calorie restricted, a healthy diet, and regular exercise, is bound to deliver some great weight loss results, and with that, eliminate the side-effects and complications of overweight and obesity, including increased risk of diabetes, heart disease, heart attack, stroke, arthritis etc.

However, Phentermine is not a “magic pill,” and it will be wrong of you to think so. While Phentermine can do so much for you, you have to do your part regarding the healthy diet and exercising regularly if you want to succeed at accomplishing your goal of losing weight.

Phentermine is only available with a doctor’s prescription, and it is only meant to be used for a short period of time only. The maximum period of usage is three months or 12 weeks. If the patient is in need of Phentermine after that period, the doctor can decide to prescribe Phentermine once again, after a pause has been made in between.

What Phentermine does is it suppresses your appetite, while at the same time boosting your energy so that you will feel less hungry, able to stick to your chosen diet plan, and still have the energy to go on with your planned workout sessions at the gym or home. By stimulating your nervous system, Phentermine is able to do this and much more to help you get to your goal of losing weight efficiently and become a healthier, better version of yourself.

Is it safe to use Phentermine?

Phentermine is an FDA-approved drug. Knowing that, as well as the fact that you can only get Phentermine with a valid doctor’s prescription, you can draw the conclusion that we are talking about a safe-to be used weight loss drug here. However, as it is with most prescription drugs these days, certain side-effects can be expected to develop, depending on numerous factors. That is the case with Phentermine as well, unfortunately.

Some of the Phentermine side-effects are more severe than others. The biggest side-effect of Phentermine is an addiction. Unfortunately, Phentermine is a highly addictive drug, which if misused or abused it will surely lead to an addiction. Other common side-effects include weight gain, dry mouth, insomnia, constipation, diarrhea, headaches, etc (2).

In conclusion, Phentermine is considered safe to be used as long as you use it as instructed by your doctor. Avoid any increase or decrease in terms of dosage without consulting with your doctor first. You would not like to risk experiencing any side-effects and endangering your experience with Phentermine, and most importantly – the promised results.

Diet tips to follow during your treatment with Phentermine

We all have heard our doctors telling us that the best and healthiest way to lose weight efficiently is to combine a balanced diet with regular exercise. Are you feeling overwhelmed standing in the middle of the supermarket, wondering what would be the best thing to add to your diet, and what certainly is not?

In the following, we will share some of the best foods to include in your new and improved diet so that next time you head to the supermarket, you will know what to include in your shopping list without any doubts about endangering your diet and your use of Phentermine!

A lot of fresh fruits and vegetables

Any seasonal fruits and vegetables that you can find at the supermarket will be a great food choice to include in your new diet. Fresh fruits and vegetables have fewer calories, and yet, they are somehow just as delicious and satisfying in terms of the feeling of hunger. Plus, they are filled with lots and lots of vitamins and minerals, which your body normally requires in order to function well. Whenever you are feeling hungry, you can prepare yourself a salad or eat some fruits without the feelings of disappointment that you have ruined your diet and still feel full and satisfied (3).

It is all about foods that are high in fiber

There are a lot of food choices which are at the same time delicious and filled with this magical thing called fiber. When you are trying to lose weight, high-fiber foods are your new best friends. The high-fiber foods are able to satisfy your hunger in the long run, in addition to being highly nutritional and delicious. Avocados, apples, strawberries, pears, bananas, broccoli, quinoa, oats, and many other food choices are out there for you to choose from. All that you have to do is add your favorite choices of high-fiber foods to your shopping list the next time you visit the supermarket.

Do not forget the clean protein

If you are working towards losing weight and shaping your muscles in their lean, perfect form for a show-off, then what you need is to combine Phentermine and clean proteins in your diet. You see, high-protein foods require more time and effort to be metabolized in your digestive system, and you know what that means – more calories being shredded and less frequent feelings of hunger of course! Proteins are highly important to your body in general. That is why we highly recommend adding foods such as chicken, fish, beef, eggs, tofu, nuts, etc. to your diet as much as possible.

Drink a lot, and we mean a lot, of water

Keeping hydrated should be a top priority at all times – during all four weather seasons. Drinking enough water to keep your body hydrated is especially important during the weight loss process. Think about it – when you are exercising regularly, as a part of the weight loss process as we mentioned earlier, your body loses water through sweating which brings you closer to the risk of dehydration which is bad enough as it is. But drinking at least eight glasses of water on a daily level will help you lose weight as well, in addition to helping you distinguish the difference between the feelings of hunger and the feelings of thirst.

Befriend the green tea

Perhaps you are a fan of the green tea already, or perhaps you choose coffee over green tea as your choice of caffeine source. Well, when you are trying to lose weight, you might want to think about drinking more green tea, not for the sake of introducing caffeine to your body, but in terms of losing weight of course. It has been considered that drinking green tea, due to the high amounts of caffeine, it can lead to losing a pound a week, due to the extreme fat burning process and energy boost that come with the high amounts of caffeine (4).

Try drinking at least one cup of hot green tea to which you will add a couple of drops of lemon juice just to improve the taste before your workout. You should feel the energy boost as you engage in your regular exercise routine.

Foods to avoid while using Phentermine

When you are trying to lose weight, there are simply a couple of food and drink choices that you would want to stay as far as away from possible. In the following, we will share some of the great choices that will endanger your weight loss process and the results that you are working hard for.


Alcohol is just empty carbohydrates in a glass. There is nothing nutritional about alcohol, and yet most alcoholic beverages contain high amounts of calories that will do only harm to your weight loss process, among other side-effects to your general health. We would advise you to keep away from drinking alcohol during your weight loss process. While there is nothing wrong with drinking a glass of red wine with dinner or drinking a glass of cold beer with friends, we advise you to stop there for the sake of, not only the weight loss process but your general health as well.

Artificial sugars

Artificial sugars contain nothing more than high amounts of fructose, which most of the time ends up being stored as fat, which adds to your weight gain. If you are interested in losing weight, we recommend you to avoid consuming any artificial sugars at all including processed foods, frozen meals, store-bought juices, candy, etc. If you put the time and energy, you will surely find an acceptable substitute for these common artificial sugars in your diet.

Energy drinks

While you might like the taste and the energy that you get from your favorite energy drink, we would recommend to replace them with a hot cup of coffee or green tea. Energy drinks are once again, nothing more than empty calories in a can. They are filled with sugars that do not do anyone any good, especially not to your weight loss process (5).


As you can see, following a clean, healthy diet plan does not always mean that you have to feel hungry and angry all the time. It should not be an unpleasant experience, and you just have to know what exactly it is that you want to achieve. In today’s article, we have shared some great diet tips on what a proper diet plan should include and what it should for sure exclude to help you achieve your goal of losing weight. That way, even if you do not want to follow a specific diet plan, at least you have the information needed to modify your diet plan as it is.


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