Mebhydrolin (INN) or mebhydroline is an antihistamine. It is not available in the United States, but it is in various other countries under the brand names Bexidal <small>(BD)</small> and Diazolin <small>(RU)</small>. It is used for symptomatic relief of allergic symptoms caused by histamine release, including nasal allergies and allergic dermatosis.
Mebhydrolin has been shown to magnify the performance-deficit effects of alcohol.