A member asked:

What are the differences between phentermine and alli?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Work differently.: Alli helps to prevent fat absorption. Phentermine is an amphetamine. Alli is OTC, Phentermine is by prescription.

Answered 5/13/2016

2.8k views

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