What are the active ingredients in phentermine diet pills?

The active ingredient in phentermine diet pills is usually phentermine hydrochloride (phentermine HCl) or phentermine resin. Most pills contain phentermine HCL and Ionamin (a name brand form) contains phentermine resin. Ionamin is no longer available in the United States.

phentermine hydrochloride (chemical structure)

→ To learn more about phentermine weight loss pills, visit the phentermine HCL ultimate guide.

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