Is there a difference in ingredients between generic Phentermine and a brand-name Phentermine?
The active ingredients in the brand-name and generic products are the same. Both the brand-name and the generic versions must have the same potency, be available in the same dosage forms (i.e. tablet, liquid, injectable), be demonstrated safe and effective, and be manufactured under government-approved Good Manufacturing Practices (GMP). Significant differences in any of these areas would mean the generic drug would not be approved by the FDA, and therefore would not be available. Although the inactive ingredients such as fillers and dyes are allowed to be different, these ingredients should not affect the safety or efficacy of a drug in any way. In fact, brand-name as well as generic companies often change these inactive ingredients…with FDA approval, of course.
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