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It is contraindicated in asthmatic patients, newborn or premature infants and nursing mothers.
Antihistamines should not be used to treat lower respiratory tract symptoms, including asthma.
Antihistamines are also contraindicated in the following conditions: Hypersensitivity to diphenhydramine HCl and other antihistamines of similar chemical structure.
Monoamine oxidase inhibitor therapy.
