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Medical Definition of Edrophonium chloride
1. Dimethylethyl (3-hydroxyphenyl)ammonium chloride;a competitive antagonist of skeletal muscle relaxants (curare derivatives and gallamine triethiodide) and an anticholinesterase, used as an antidote for curariform drugs, as a diagnostic agent in myasthenia gravis, and in myasthenic crisis. (05 Mar 2000)