rihexyphenidyl hydrochloride (HCl) is a medication used to manage movement disorders, available in tablet form. Here’s a detailed overview:

Key Points About Trihexyphenidyl HCl Tablets:

• Composition: Each tablet contains trihexyphenidyl hydrochloride as the active ingredient.

• Purpose: It is primarily used to treat symptoms of Parkinson’s disease, such as tremors, stiffness, and muscle rigidity. It is also sometimes prescribed to manage extrapyramidal side effects (involuntary movements) caused by certain antipsychotic medications.

• Action: Trihexyphenidyl is an anticholinergic drug. It works by blocking acetylcholine in the nervous system, helping to restore the balance between dopamine and acetylcholine, which reduces muscle stiffness and tremors.

• Dosage: The dose depends on the condition, severity of symptoms, and patient response. Tablets are usually taken 1–3 times daily, and dosing may start low and gradually increase.

• Common Side Effects: Dry mouth, blurred vision, constipation, dizziness, drowsiness, difficulty urinating, and sometimes memory problems.

• Precautions:

  • Caution in elderly patients due to increased risk of confusion, falls, or memory issues.

  • Should be used carefully in people with glaucoma, urinary retention, heart problems, or gastrointestinal issues.

  • Avoid alcohol or other sedatives, as they can worsen drowsiness.

• Interactions: Can interact with other anticholinergic drugs, certain antidepressants, or medications that affect heart rhythm.

Trihexyphenidyl HCl tablets require gradual dose adjustment and careful monitoring, especially in older adults, to balance symptom relief and side effects.