antagonist

(redirected from H2-Receptor Antagonist)
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antagonist

1. any muscle that opposes the action of another
2. a drug that counteracts the effects of another drug

antagonist

[an′tag·ə‚nist]
(biochemistry)
A molecule that bears sufficient structural similarity to a second molecule to compete with that molecule for binding sites on a third molecule.
(pharmacology)
A drug or other chemical substance capable of reducing the physiological activity of another chemical substance; refers especially to a drug that opposes the action of a drug or other chemical substance on the nervous system by combining with and blocking the nerve receptor.
(physiology)
A muscle that contracts with, and limits the action of, another muscle, called an agonist, with which it is paired.
References in periodicals archive ?
Given the serious medical condition of the patient population, the blinded clinical trial compared Rapinex 40mg, administered through a nasogastric tube, with intravenous (IV) cimetidine, an H2-receptor antagonist, rather than with a placebo.
prescription sales remain strong for PEPCID, an H2-receptor antagonist for the treatment of duodenal ulcers and the short-term treatment of gastric ulcers and gastroesophageal reflux disease (GERD).
Prescription activity remains strong for PEPCID (R), an H2-receptor antagonist for the treatment of duodenal ulcers and the short-term treatment of gastric ulcers and gastroesophageal reflux disease (GERD).
Pepcid (R), an H2-receptor antagonist for the treatment of duodenal ulcers and the short-term treatment of gastric ulcers and gastroesophageal reflux disease (GERD), continues its solid performance despite competition from generic cimetidine, newer antisecretory agents and the introduction of over-the-counter (OTC) H2 antagonists.