Adipex vs Phentermine

Adipex is a branded medication marketed by Gate Pharmaceuticals, a subsidiary of Teva Pharmaceutical Industries, a far-famed Israeli company. The commercial sales of the preparation were launched in 1990, and since then the drug is available by prescription only.

The drug’s main active ingredient is phentermine hydrochloride, and the original medication comes in the 37.5mg capsules. Despite the identical active substance in its composition, you cannot say Adipex and Phentermine are identical drugs, although they are interchangeable.

By Phentermine people oftentimes mean a generic modification of the drug or the drug of the same name marketed by such companies as Leading Pharma LLC or Elite Laboratories Inc; plus, given the fact that it was added to the FDA registry in far 1954, the generic options are numerous.

According to, a prominent aggregator of data on pharmaceuticals, the price for Adipex-P® capsules and tablets starts from $2.20 and $2.15 accordingly. At the same time, the price for Phentermine by the aforementioned companies varies in the range of $1.70 – $1.80 per pill.

Talking about the online market, the price per pill of generic Phentermine can be as low as $0.70 and higher, depending on the offer. While Adipex-P® comes in 37.5mg capsules that must not be split according to the intake, Phentermine is available in 37.5, 30, 15 and 8mg tablet forms (the price for the smallest pills starts from $0.5).

Another difference between Adipex-P® and Phentermine, it’s generic form to be more exact, lies in auxiliary components composition. As a rule, the cleanliness of auxiliary components is typically inferior to the original version of the drug, plus when you make a choice in favour of generic medications the bioequivalence may be slightly different.

Both preparations are indicated for treatment and management of obesity. As for the mechanisms of action and pharmacological action Adipex and Phentermine are almost identical, their clinical efficiency has almost identical range. As for the generic version, perhaps, the only significant difference apart from composition lies in its availability – you don’t need the prescription to purchase it online.