Trimetaphan camsilate (INN) or trimethaphan camsylate (USAN) trade name Arfonad is a drug that counteracts cholinergic transmission at the ganglion type of nicotinic receptors of the autonomic ganglia and therefore blocks both the sympathetic nervous system and the parasympathetic nervous system. It acts as a non-depolarizing competitive antagonist at the nicotinic acetylcholine receptor is short-acting and is given intravenously.
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