Caution should be exercised in patients with high blood pressure, heart disease, diabetes or thyroid disease. The antihistamine in this product may exhibit additive effects with other CNS depressants, including alcohol.
Antihistamine may cause drowsiness and ambulatory patients who operate machinery or motor vehicles should be cautioned accordingly.
MAO inhibitors and beta adrenergic blockers increase the effects of sympathomimetics. Sympathomimetics may reduce the hypertensive effects of methyldopa, mecamylamine, reserpine and veratum alkaloids. Concomitant use of antihistamines with alcohol and other CNS depressants may have an additive effect. The safety of use of this product in pregnancy has not been established.