Diphenhydramine Impairment

Diphenhydramine is an over-the-counter as well as prescription first generation antihistamine and H 1 receptor antagonist.1 It is available alone or in combination with other compounds and includes trade names such as Benadryl, Sominex, Diphenhist, Banophen, Hydramine, Dicopanol, Allermax and more. It is used to treat allergy and common cold symptoms such as sneezing; itching;[…]