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Regimex Side Effects

Generic name: benzphetamine

Medically reviewed by Last updated on Dec 23, 2023.

Note: This document contains side effect information about benzphetamine. Some dosage forms listed on this page may not apply to the brand name Regimex.

Applies to benzphetamine: oral tablet.

Serious side effects of Regimex

Along with its needed effects, benzphetamine (the active ingredient contained in Regimex) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking benzphetamine:

More common


Get emergency help immediately if any of the following symptoms of overdose occur while taking benzphetamine:

Symptoms of overdose

Other side effects of Regimex

Some side effects of benzphetamine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

For Healthcare Professionals

Applies to benzphetamine: oral tablet.


Frequency not reported: Palpitation, tachycardia, elevated blood pressure, cardiomyopathy, ischemic cardiac events with chronic amphetamine use[Ref]

Nervous system

Frequency not reported: Overstimulation, restlessness, dizziness, tremor, sweating, headache[Ref]


Frequency not reported: Insomnia, psychotic episodes, depression following drug withdrawal[Ref]


Frequency not reported: Libido changes[Ref]


Frequency not reported: Dry mouth, unpleasant taste, nausea, diarrhea, other GI disturbances[Ref]


Frequency not reported: Urticaria, other allergic skin reactions[Ref]


1. (2001) "Product Information. Didrex (benzphetamine)." Pharmacia and Upjohn

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.