Never use promethazine if you are allergic to it or any similar drugs, including: Chlorpromazine ( Thorazine ) Fluphenazine (Prolixin) Mesoridazine (Serentil) Perphenazine (Trilafon) Prochlorperazine (Compazine) Thioridazine (Mellaril) Trifluperazine (Stelazine) Let your doctor know right away if...