Atropine is generally considered to be a cholinergic muscarinic
receptor antagonist.
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atropine sulfate is used as an antidote of anticholinesterase
meds administered on patients with myasthenia gravis. Atropine
sulfate should be also made available when performing the Tensilon
Test to reverse the effect of Edrophonium injection.
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blockade of postsynaptic receptor
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atropine
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Check out the atropine page at wikipedia.org for your
answer.