Patients w/ history of drug allergy; thyroid disease, DM; high fever; cardiac disease, HTN. Debilitated patients. Patients w/ ongoing treatment. May impair ability to drive or operate machinery. Patients w/ hepatic or renal disease. Pregnancy & lactation. Childn. Tab: Patients or family members w/ constitutional predisposition to urticaria, contact dermatitis, allergic rhinitis, migraine, food allergy. Syr: Childn <6 yr.