blocker
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blocker
[blok´er]something that blocks or obstructs a passage or activity; see also antagonist and blocking agent.
α-blocker alpha-adrenergic blocking agent.
β-blocker (beta-blocker) beta-adrenergic blocking agent.
calcium channel blocker calcium channel blocking agent.
potassium channel blocker potassium channel blocking agent.
sodium channel blocker sodium channel blocking agent.
block·er
(blok'er),An instrument used to obstruct a passage.
blocker
/block·er/ (blok´er) something that blocks or obstructs passage, activity, etc.α-blocker alpha-adrenergic blocking agent; see adrenergic blocking agent.
β-blocker beta-adrenergic blocking agent; see adrenergic blocking agent.
calcium channel blocker calcium channel blocking agent.
potassium channel blocker potassium channel blocking agent.
sodium channel blocker sodium channel blocking agent.
blocker
See blocking agent.
blocker
A popular term for anything which physically (e.g., a bed blocker, see there) or pharmacologically (e.g., a beta-blocker) impedes a process or activity.block·er
(blok'ĕr)1. An instrument used to obstruct a passage.
2. See: blocking agent
blocker
something that blocks or obstructs passage, activity, etc.
α-blocker, alpha-blocker
a drug that induces adrenergic blockade at α-adrenergic receptors.
β-blocker, beta-blocker
a drug that induces adrenergic blockade at either β1- or β2-adrenergic receptors, or both (see also beta-blocker).
calcium channel blocker
a drug that selectively inhibits the influx of calcium ions through a specific ion channel of cardiac muscle and smooth muscle cells (see also calcium channel blocker).
H2-receptor blocker
a drug, such as cimetidine that inhibits the secretion of gastric acid stimulated by histamine, pentagastrin, food and insulin, and also basal secretion; used in the treatment of peptic ulcer.