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Benzhexol also called as trihexyphenidyl is used to treat Parkinson’s disease (degenerative disorder of brain affecting the body movement). It can also be used to treat other movement disorders such as feeling restless, uncontrolled movements of hands and legs, tightness in the muscles etc.

How it works

Benzhexol is an anticholinergic agent that belongs to the class of medications called as antispasmodics. It works by improving muscle control and reducing muscle stiffness in the patients thereby relieving associated symptoms.

Common side effects

Nervousness, Acute toxicity, Anxiety, Blurred vision, Confusion, Dizziness, Dry mouth, Euphoria (feeling of intense excitement and happiness), Hallucination, Nausea, Rash, Restlessness, Stomach upset, Tachycardia, Vomiting, Constipation


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Expert advice

  • Tell your doctor if you have any heart disease including high blood pressure, lung diseases, liver or kidney disease, thyroid disease, difficulty passing urine, increased pressure in eyes etc. 
  • Exercise caution if you are an elderly patient.
  • Do not drive or use any machinery after taking benzhexol as it may cause dizziness.
  • Tell your doctor if you are pregnant, planning to become pregnant or are breastfeeding. 
  • Do not take if patient is allergic to benzhexol or any of its ingredients.

Frequently asked questions


Q. Is benzhexol addictive?
Yes, benzhexol can be addictive, hence should be used strictly under doctor’s supervision.

Content on this page was last updated on 30 September, 2016, by Dr. Varun Gupta (MD Pharmacology)