I am 59 years old, Schizophrenic since 1987. I was put on various drugs since then and got relief. Of late, I am having hallucinations and delusions and hence am prescribed Trinicalm Plus 1-0-1 and Sizopin 50 mg 0-0-1. There is relief. But Trifluoperazine is causing me mild itching. My Psychiatrist has told me that this drug is also an anti-histamine and hence itching might be due to something else, but to take cetrizine, if only itching persists. I am taking cetrizine 10 mg 1-0-0, since a week and there is no itching. My question is whether to continue cetrizine as long as I am on Trifluoperazine or just stop after taking for a week? Also confirm whether cetrizine has got any side effects or is it habit forming? KIndly be specific in answers.