Phentermine

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Also indexed as:

Adipex-P, Fastin, Ionamin, Obenix, Obephen, Obermine, Obestin, Phentamine, Phentride, T-Diet, Zantril

Phentermine is a nonamphetamine drug used as a short-term adjunct to calorie restriction for weight loss. Phentermine is available in two forms, phentermine hydrochloride (Fastin® and others) and phentermine resin (Ionamin® and others).

Herbs

Summary of Interactions for Phentermine

Depletion or interference	None known
Adverse interaction	None known
Side effect reduction/prevention	None known
Supportive interaction	None known
Reduced drug absorption/bioavailability	None known

An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

Other Interactions

Food

Phentermine should be taken on an empty stomach.¹

Alcohol

Phentermine may cause dizziness or blurred vision.² Alcohol may intensify these effects, increasing the risk for accidental injury. People taking phentermine should avoid alcohol.

References

1. Threlkeld DS, ed. Central Nervous System Drugs, Anorexiants. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Mar 1989, 239.
2. Threlkeld DS, ed. Central Nervous System Drugs, Anorexiants. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Mar 1989, 239.

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Last Review: 01-21-2009

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