Use with caution on elderly patients or patients with allergies to the drug, chronic alcoholism, serious liver or kidney disease, diabetes, heart or thyroid disease, high blood pressure, chronic lung disease, glaucoma, difficulty in urination due to enlarged prostate, or pregnant or nursing, or taking antidepressants, other antihistamines, tranquilizers, or sedating drugs.
Occupational Hazards: Effects on Ability to Drive and Use Machines: Patients should be cautioned not to operate vehicles or hazardous machinery until their response to the drug has been determined. Since the depressant effects of antihistamines are additive to those of other drugs affecting the CNS, patients should be cautioned against drinking alcoholic beverages or taking hypnotics, sedatives, psychotherapeutic agents or other drugs with CNS depressant effects during antihistamine therapy.
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