Use drugs.com’s drug interaction checker, trusted by doctors and patients, to instantly review your meds for unsafe combinations.. The antihistamine, diphenhydramine (and its active salt dimenhydrinate), is typically a substance used in modern medicine to fight the effects of allergies and nausea, as a sleep aid and.
Allergy (diphenhydramine hcl) side effects get emergency medical help if you have signs of an allergic reaction:. Indications, dosage, adverse reactions and pharmacology.