Trihexynol Tablet is used to treat Parkinson's disease and drug-induced movement disorder. It should be taken empty stomach and at the same time daily to maintain a consistent level of medicine. Common side effects include nausea, vomiting, constipation, and blurred vision. It may cause dizziness and sleepiness, so avoid driving or mental focus until you know how it affects you. Dry mouth may occur, so maintain good oral hygiene and increase water intake. Inform your doctor if you have heart problems, liver or kidney disease, or if Tablet may affect other drugs. Pregnant or breastfeeding mothers should consult their doctor before starting treatment.