Biperiden (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:

• Anxiety
• Chest pain or discomfort
• Chills
• Cold sweats
• Confusion
• Confusion about identity, place, and time
• Decrease in frequency of urination
• Decrease in urine volume
• Difficulty in passing urine (dribbling)
• Disturbed behavior
• Dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
• Dry mouth
• False or unusual sense of well-being
• Hyperventilation
• Irregular heartbeats
• Irregular, twisting uncontrolled movement of the face, hands, arms, or legs
• Irritability
• Nervousness
• Painful urination
• Restlessness
• Shaking
• Shortness of breath
• Slow or irregular heartbeat
• Trouble sleeping
• Unusual tiredness

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

• Change in consciousness
• Chest pain or discomfort
• Convulsions
• Decreased awareness or responsiveness
• Decreased secretions of the mouth, pharynx, nose, or bronchi
• Delusions of persecution, mistrust, suspiciousness, or combativeness
• Dizziness
• Dry mouth
• Enlarged pupils
• Face is warm or hot to touch
• Fainting
• Fast, slow, pounding, or irregular heartbeat or pulse
• Foul-smelling breath
• Holding false beliefs that cannot be changed by fact
• Lightheadedness
• Loss of consciousness
• Loss of memory
• No breathing
• Redness to face
• Seeing, hearing, or feeling things that are not there
• Severe sleepiness
• Shakiness and unsteady walk
• Trouble sitting still
• Unsteadiness, trembling, or other problems with muscle control or coordination
• Unusual excitement, nervousness, or restlessness
• Warm, dry skin

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:

• Blurred vision
• Difficulty having a bowel movement (stool)
• Drowsiness
• Nausea
• Vomiting

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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