anti-arrhythmia drug
A drug used for the treatment or prevention of cardiac arrhythmias. Anti-arrhythmia drugs may affect the polarisation-repolarisation phase of the action potential, its excitability or refractoriness, or impulse conduction or membrane responsiveness within cardiac fibres.
anaesthesia adjuvant
Any substance that possesses little anaesthetic effect by itself, but which enhances or potentiates the anaesthetic action of other drugs when given at the same time.
mydriatic agent
Agent that dilates the pupil. Used in eye diseases and to facilitate eye examination. It may be either a sympathomimetic or parasympatholytic. The latter cause cycloplegia or paralysis of accommodation at high doses and may precipitate glaucoma.
parasympatholytic
Any cholinergic antagonist that inhibits the actions of the parasympathetic nervous system. The major group of drugs used therapeutically for this purpose is the muscarinic antagonists.
bronchodilator agent
An agent that causes an increase in the expansion of a bronchus or bronchial tubes.
antidote to sarin poisoning
A role borne by a molecule that acts to counteract or neutralise the nerve agent sarin.
oneirogen
Any substance that produces or enhances dream-like states of consciousness.
muscarinic antagonist
A drug that binds to but does not activate muscarinic cholinergic receptors, thereby blocking the actions of endogenous acetylcholine or exogenous agonists.
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