Common Side Effects:Check with your doctor if any of the following side effects continue or are bothersome:
Blurred vision; constipation; decreased sweating; difficult or painful urination (especially in older men); drowsiness; dryness of mouth, nose, or throat; increased sensitivity of eyes to light; nausea or vomiting
Less Common Side Effects:Check with your doctor if any of the following side effects continue or are bothersome:
Dizziness or lightheadedness when getting up from a lying or sitting position; false sense of well-being (especially in the elderly or with high doses); headache; loss of memory (especially in the elderly); muscle cramps; nervousness; numbness or weakness in hands or feet; soreness of mouth and tongue; stomach upset or pain; unusual excitement (more common with large doses of trihexyphenidyl)
Always Notify Doctor:Rare: Confusion (more common in the elderly or with high doses); eye pain; skin rash
Withdrawal Side Effects - Notify Doctor:Anxiety; difficulty in speaking or swallowing; dizziness or lightheadedness when getting up from a lying or sitting position; fast heartbeat; loss of balance control; mask-like face; muscle spasms, especially of face, neck, and back; restlessness or desire to keep moving; shuffling walk; stiffness of arms or legs; trembling and shaking of hands and fingers; trouble in sleeping; twisting movements of body
Overdose Effects - Notify Doctor:Clumsiness or unsteadiness; drowsiness (severe); dryness of mouth, nose, or throat (severe); fast heartbeat; hallucinations (seeing, hearing, or feeling things that are not there); mood or mental changes; seizures; shortness of breath or troubled breathing; trouble in sleeping; warmth, dryness, and flushing of skin
Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.
Disclaimer: This is not intended to be all-inclusive or to replace information provided by your doctor or with the prescription from the manufacturer.