blocker (redirected from alpha-blocker, alpha-blocker)

blocker /block·er/ (blok´er) something that blocks or obstructs passage, activity, etc.

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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.

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blocker.

See blocking agent.

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blocker

something that blocks or obstructs passage, activity, etc.

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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.