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Regimex Side Effects

Generic Name: benzphetamine

Note: This page contains side effects data for the generic drug benzphetamine. It is possible that some of the dosage forms included below may not apply to the brand name Regimex.

For the Consumer

Applies to benzphetamine: oral tablet

As well as its needed effects, benzphetamine (the active ingredient contained in Regimex) may cause unwanted side effects that require medical attention.

Major Side Effects

If any of the following side effects occur while taking benzphetamine, check with your doctor immediately:

More common:
  • Agitation
  • anxiety
  • confusion
  • convulsions (seizures)
  • dizziness
  • fast, irregular, pounding, or racing heartbeat or pulse
  • feeling lightheaded or faint
  • hallucinations
  • headache
  • hives or welts
  • irritability
  • itching
  • lightheadedness
  • mood or other mental changes
  • nervousness
  • nightmares
  • numbness or tingling in the arms or legs
  • redness of skin
  • restlessness
  • shakiness in the legs, arms, hands, or feet
  • skin rash
  • sleeplessness
  • sweating
  • trembling of the hands or feet
  • trouble with sleeping
  • trouble with thinking, speaking, or walking
  • unable to sleep
  • unusual feeling of excitement
  • weakness
Rare
  • Chest discomfort or pain
  • difficulty breathing
  • discouragement
  • feeling sad or empty
  • lack of appetite
  • loss of interest or pleasure
  • severe mental changes
  • shortness of breath
  • swelling of the feet or lower legs
  • trouble with concentrating
  • trouble with breathing
  • unusual tiredness or weakness

If any of the following symptoms of overdose occur while taking benzphetamine, get emergency help immediately:

Symptoms of overdose:
  • Blurred vision
  • change in consciousness
  • dark-colored urine
  • diarrhea
  • dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly
  • fever
  • loss of consciousness
  • muscle cramps or spasms
  • muscle pain or stiffness
  • nausea
  • nervousness
  • physical attempt to injure oneself
  • pounding in the ears
  • rapid, shallow breathing
  • severe anxiety or feeling of panic
  • stomach cramps
  • violent actions
  • vomiting

Minor Side Effects

Some benzphetamine side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common:
  • Decrease in sexual ability, desire, drive, or performance
  • decreased interest in sexual intercourse
  • dry mouth
  • inability to have or keep an erection
  • increase in sexual ability, desire, drive, or performance
  • increased interest in sexual intercourse
  • unpleasant taste

For Healthcare Professionals

Applies to benzphetamine: oral tablet

Cardiovascular

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]

Psychiatric

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

Endocrine

Frequency not reported: Libido changes[Ref]

Gastrointestinal

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

Hypersensitivity

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

References

1. "Product Information. Didrex (benzphetamine)" Pharmacia and Upjohn, Kalamazoo, MI.

It is possible that some side effects of Regimex may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

More about Regimex (benzphetamine)

Consumer resources

Professional resources

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Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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