Phentermine Generic Vs. Brand Name

Phentermine is a prescription diet pill that is manufactured and distributed to help individuals who are obese and whose weight may be leading to other health issues currently or in the near future. Some of these comorbid disorders that may come along with severe obesity are heart disease, diabetes, high blood pressure, and premature death.​



​Phentermine is an amphetamine and is classified as a psycho stimulant. It can only be obtained through a prescription by a physician. It is also prescribed alongside a reduction in daily caloric intake and increase in exercise and other physical activity. Clinical trials with Phentermine have been very successful and have shown significant results with weight loss for participants in these trials. It is often taken once daily, either before or after a healthy breakfast, but doses can vary based upon the needs of each individual. Your doctor will be able to make an assessment of your specific needs and goals and set up the best plan for you.

There are many forms of Phentermine on the market today, including Adipex-P, which is the brand name prescription for Phentermine as well as many generic forms. Let’s start by discussing the brand name version of this drug. Adipex-P is manufactured and distributed by Teva/GATE pharmaceuticals and is the most popular brand of Phentermine Hydrochloride. It comes in the traditional 37.5 mg dosage. This brand name prescription is similar to other generic forms but has some differences in the inactive ingredients. Some of these inactive ingredients include corn starch and colorants. The corn starch helps the Phentermine to be better absorbed by the body while the colorants help to make this medication more easily identifiable.

​All brand name and generic forms of Phentermine must be bio equivalent to traditional Phentermine in order to be marketed as such a product. This simply means that each generic form of this prescription drug has been sufficiently researched and studied to ensure that each has the same results in efficacy as well as the same chemical makeup with equivalent doses. Basically, the active ingredients must mirror that of Phentermine/Adipex-P. However, the inactive ingredients are able to be played with by the manufacturer. This is definitely something worth spending your time researching and/or speaking to your physician before making your final decision regarding which medication is right for you. While most inactive ingredients are generally safe, some may have differing diverse and/or adverse effects for different individuals. One example of a common inactive ingredient in phentermine generics is resin. This resin helps the body absorb the phentermine more efficiently over a long period of time, but does not have many other reactions in the human body. This is used in the extended release forms of Phentermine.

​Some other differences that you may find with generic versions are things like the physical form in which the drug is manufactured. Phentermine 37.5 comes in a tablet form, while Adipex-P comes in a capsule. There are even forms of generic Phentermine that are made to simply dissolve in the mouth without swallowing. It is very important to keep in mind that every individual reacts to certain medications in very different ways, even when it comes to inactive ingredients. So, as mentioned above, it is important to speak with your doctor about your options, whether taking prescription Phentermine or if interested in any over the counter alternative. It is also of utmost importance to keep in contact with your doctor and/or pharmacist about any side effects that you are experiencing, especially if these side effects are extreme or last for a long period of time. At the same time, with some generic forms and with Adipex-P, the inactive ingredients have the effect of better absorption rather than adverse effects, so these inactive ingredients can be an important component to take note of, research, and review with your doctor.

​The final and most obvious difference between traditional Phentermine 37.5 and other generic forms is the price. Many people will opt for a generic solely due to price, but if you are not going to achieve the results you want, then it may be worthwhile to pay a little more for a more effective product. You may end up spending more money in other areas if you aren’t achieving the results you want. Or you may end up spending more money having to switch prescriptions at a later date. Again, and this can’t be repeated enough, consult with your doctor and/or pharmacist regarding all of these concerns when making the decision about what medications are right for you. Best of luck in your weight loss journey!

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