Trihexyphenidyl Hydrochloride Tablets.

Functions and indications:
Used for Parkinson’s disease and Parkinson’s syndrome. It can also be used for drug-induced extrapyramidal diseases.

Usage and dosage:
Oral. 1. Parkinson’s disease and Parkinson’s syndrome: Start with 1-2 mg a day, and then increase by 2 mg every 3-5 days until the best effect is achieved without side effects. Generally, no more than 10 mg a day, divided into 3-4 times, and must be taken for a long time. The maximum daily dose is 20 mg. 2. Drug-induced extrapyramidal diseases: 2-4 mg on the first day, divided into 2-3 times, and then gradually increased to 5-10 mg according to needs and tolerance. 3. Elderly patients should reduce the dose as appropriate.

Adverse reactions:
1. Common dry mouth, blurred vision, etc., occasionally tachycardia, nausea, vomiting, urinary retention, constipation, etc. 2. Long-term use may cause drowsiness, depression, memory loss, hallucinations, and turbidity of consciousness.

Contraindications:
Patients with glaucoma, urinary retention, and prostatic hypertrophy.