Definition of antihistamine in English English dictionary
A drug or substance that counteracts the effects of a histamine. Commonly used to alleviate the symptoms of hay fever and other allergies
An antihistamine is a drug that is used to treat allergies. a drug that is used to treat an allergy (=an unpleasant reaction to particular foods, substances etc). Synthetic drug that counteracts the effects of released histamine in the body. Antihistamines compete with histamine at one of the three types of histamine receptors, preventing allergic attacks (see allergy) or inflammation. Some antihistamines also prevent motion sickness and vertigo. Drowsiness is a frequent side effect. H2 antihistamines, which bind to the second receptor type, are used to control gastric-acid secretion (see stomach) and treat peptic ulcers
A medicine used to counteract histamine, a chemical released by the body in an allergic reaction, which contributes to the inflammation
a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site
a chemical that blocks the affect of histamine in a susceptible tissues Histamine is released by immune cells during an allergic reaction and also during infection with viruses which cause the common cold The interaction of histamine with the mucus membranes of the eyes and nose results in "watery eyes" and the "runny nose" often accompanying allergies and colds Antihistamines can alleviate such symptoms
The major effect of antihistamines is to inhibit the actions of histamine released in the body during an allergic reaction In addition, antihistamines have anticholinergic properties that may be beneficial in the treatment of tremor in PD
a group of medications that blocks the effects of histamine and reduce itching, sneezing, and runny nose; a chemical released in body fluids during an allergic reaction antihistamines reduce itching, sneezing, and runny nose
A family of drugs used to treat allergic conditions, such as hay fever, allergic conjunctivitis, itching, sneezing, runny nose, motion sickness, dizziness, sedation, insomnia and others These drugs include astemizole, azatadine, brompheniramine, carbinoxamine, cetirizine, chlorpheniramine, clemastine, cyproheptadine, dexchlorpheniramine, dimenhydrinate, diphenhydramine, diphenylpyraline, doxylamine, fexofenadine, hydroxyzine, loratadine, phenindamine, promethazine, pyrilamine, terfenadine, trimeprazine, tripelennamine, triprolidine