Adipex Versus Phentermine -- What's the Difference?
What's the difference between Adipex® versus phentermine? Phentermine was sold under several different brand names in the past (Fastin®, Ionamin®, Obestin-30®, Oby-Trim®, Ona-Mast®, Pre-Sate®, and Tora®), but these products are no longer available. Adipex-P® is currently the only brand-name phentermine product still available.
Generic Adipex tablets and capsules are available in one strength -- phentermine 37.5 mg. Other strengths of phentermine are not equivalent to Adipex-P.
All generic medications must undergo certain tests to compare them to brand-name medications. The U.S. Food and Drug Administration (FDA) then looks at these tests to decide if the generics are equivalent to the brand-name medications and assigns a rating to each one. An "AA" rating means that the FDA has determined that a generic medication is equivalent to a brand-name medication. All of the generic phentermine 37.5 mg tablets and capsules currently available have an "AA" rating, which means they should be equivalent to Adipex.
(Click Adipex, Generic Adipex, Phentermine, and Generic Phentermine for more information about the difference between phentermine versus Adipex, what forms and strengths are available for each medication, and important warnings and precautions for both products.)