Phentermine is available in a variety of dosages, ranging from 8 mg to 37.5 mg. However, phentermine 37.5 is by far the most commonly prescribed form of phentermine [1-3]. Now I’m sure you want to know why it is so popular? We’ll explain more about the different dosages of phentermine and why 37.5 mg is the most prescribed type.
Although international brands such as Duromine are available in higher dosages , phentermine that is available in the US ranges from 8 mg to 37.5 mg [1, 2]. Phentermine 37.5 is therefore the highest dosage that is prescribed in the US.
The mg or milligram amount refers to the amount of phentermine hydrochloride (phentermine HCL) in each capsule or tablet.
Phentermine HCL is the active ingredient of generic phentermine and name brands such as Adipex. Therefore, phentermine 37.5 contains 37.5 mg of phentermine HCL per tablet or capsule. The capsules and tablets contain other ingredients, but these are inactive 'filler' ingredients which are not taken into account when referring to the phentermine dosage.
Generic phentermine refers to phentermine that is produced by a variety of pharmaceutical companies under the name 'phentermine', as opposed to a brand name. Generic phentermine capsules come in 15 mg, 30 mg, and 37.5 mg dosages. Similarly, brand name phentermine capsules are available in 15 mg, 30 mg and 37.5 mg, while generic phentermine tablets are only available in 37.5 mg. The brand name Lomaira (phentermine HCL) is available in 8 mg. However, some doctors choose to prescribe the 37.5 mg tablets because they can be split in half and taken either as two doses of 18.75 mg during the day, or as half a tablet per day.
The most well-known phentermine brand, Adipex, comes in both capsule and tablet form, but is only available in the maximum dosage of 37.5 mg . Adipex is therefore a branded version of phentermine 37.5.
In general, doctors will prescribe the lowest dosage of medication that is needed to provide the desired effects. However, in the case of phentermine, it is quite typical for patients to start off with phentermine 37.5 mg for the following reasons:
Phentermine 37.5 mg is the most popular and most commonly prescribed dosage of phentermine [1-3]. However, this may not be the best choice for everyone. Due to individual differences in the way our bodies metabolize drugs, taking high dosages does not necessarily mean it will be more effective for you. With phentermine 37.5, both the side effects and desired effects can be too strong for many people [1-3], but being able to split the tablet in half makes it easy to reduce the dosage if it becomes necessary.
By comparison, although lower dosages of phentermine tend to give patients fewer side effects , they may not always give patients the desired level of appetite suppression and energy that is sufficient enough for them to successfully lose weight. Therefore, it's a matter of getting the right phentermine dosage for each individual, which can often be a balancing act between minimizing side effects and maximizing weight loss. The right amount for you is one that helps you control your appetite, boosts your energy, and enhances your motivation, but does not cause unmanageable side effects.
If your dosage is reduced and phentermine continues to work for you, it means your body is not building up a resistance to this concentration of phentermine. It's also indicates that any side effects you may be experiencing are mild and manageable. On the other hand, those who start off on phentermine 37.5 mg often report that they suffer from much more severe side effects and this can hinder their weight loss progress [1-3]. For example, side effects such as insomnia can negatively affect weight loss as sleep is crucial to ensure that your body is burning fat and maintaining a steady metabolism. It's also not uncommon for people to stop taking phentermine altogether due to the extremity of side effects for some patients. After speaking with your doctor, you should be able to feel confident that the most suitable phentermine dosage will be prescribed for you.
Here are the most popular phentermine 37.5 mg tablets and capsules:
Manufactured by Teva Pharmaceuticals USA, Adipex-P is the most popular brand of Phentermine. This tablet is characterized by its blue spleckles and was copied many times by other brands, as you can see below. This tablet is relatively small and can be easily swallowed.
Please visit our Adipex-P page for more information.
The capsules have the same strength as the tablet and they are also manufactured by Teva Pharmaceuticals USA. It is less popular than Adipex 37.5 tablets, but this is probably because it doesn't have the famous blue speckles that people think contain the phentermine active ingredient. However, some doctors prefer prescribing capsules because they are easier to swallow.
These phentermine 37.5 mg tablets are manufactured by Qualitest Pharmaceuticals, which is a small generic manufacturer that was recently acquired by Endo Pharmaceuticals.
As you can see, this tablet looks like the Adipex 37.5 mg tablet although its blue speckles are darker.
This tablet was previously called Purepac Phentermine, but now manufactured and distributed by Actavis Pharmaceuticals, a leading generic pharmaceutical manufacturer. These tablets are easy to identify thanks to their R-316 imprint. They are small, smooth, and easy to swallow. Before being acquired by Actavis, Purepac was the largest manufacturer of phentermine 37.5 mg tablets.
Able Laboratories, Inc. was a developer and manufacturer of generic pharmaceutical products in tablet, capsule, liquid, and suppository dosage forms. However in May 2005, the firm went bankrupt and suspended the manufacturing and distribution of its line of phentermine tablets.
Actavis Totowa LLC was previously known as Amide Pharmaceuticals, a company based in Little Falls, New Jersey, before it was purchased by Actavis in 2006.
In the early 2000, Amide phentermine 37.5 mg tablets were very popular because they were sold by online pharmacies. Patients like this tablet because it's very similar to the well-known Adipex 37.5 mg tablet.
The capsules are manufactured by Actavis Totowa LLC and they are very similar in shape and color to Adipex 37.5 mg capsules. They are usually sold as "generic Adipex" and patients often refer to them as "cheap adipex".
KVK-Tech is a small manufacturer of generic phentermine that has grown rapidly in the last couple of years. They focus on a few products, mostly diet pills. These phentermine 37.5 mg tablets are an alternative to the Adipex 37.5 mg tablets. Furthermore, the K-25 imprint is becoming more and more popular, in particular within the phentermine.com forum, which shows that the KVK-Tech phentermine is becoming a key product in the diet pill business.
These 37.5 mg capsules are here to compete with Adipex 37.5 mg capsules as well as the capsules by Actavis. Phentermine.com is constantly receiving positive feedback from physicians who tend to think that these generic phentermine solutions are as efficient as the branded ones.