noun. A drug used to counteract the physiological effects of histamine production in allergic reactions and colds.

noun. A drug or substance that counteracts the effects of a histamine. Commonly used to alleviate the symptoms of hay fever and other allergies.

noun. a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site

"Partly because of that inconvenience, the shots are generally recommended only when other strategies, such as antihistamine drugs or dust-mite covers on mattresses, bedding, and sofas, have failed to adequately control symptoms."

medicament  medication  medicinal drug  medicine  

Dramamine  actifed  antivert  benadryl  brompheniramine maleate  

100-mg  50-mg  antacid  antipsychotic  dipyridamole