Benzphetamine (Oral Route)

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Side Effects

Along with its needed effects, a medicine 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:

• 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

• 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

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

• 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

Some side effects 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:

• 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

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

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