Trazine H is the brand name which contains two medicines: trifluoperzine and trihexyphenidyl. It is used in the treatment of schizophrenia. It's adverse effects are muscle spasms, tardive dyskinesia (involuntary movement of muscles), dry mouth, constipation, retinopathy (severe eye problem), hypotension, fatigue, menstrual irregularities, blood disorders, dermatitis, drowsiness, jaundice, convulsions (lowered seizure threshold), rash, insomnia, skin pigmentation, extrapyramidal reactions. Neuroleptic malignant syndrome (serious). Overdose will make the above symptoms far worse.