Medicine Name: Trazine-H Tablet. Composition: Trifluoperazine (2.5mg) + Trihexyphenidyl (1mg). Side Effects: Nausea Constipation Dryness in mouth Sedation Weight gain Orthostatic hypotension sudden lowering of blood pressure on standing Urinary retention Increased prolactin level in blood Dizziness Blurred vision Nervousness.