acetazolamide ( 500 mg , i.v . ) prevented the increase in amplitude induced by edrophonium ( 5 mg , i.v . ) on the action potentials derived by surface electrodes from the opponens pollicis muscle of patients affected by myasthenia gravis , when the median nerve was stimulated at the wrist by low frequency repetitive pulses ( 5/s ) .
C0013615
edrophonium
C0026896
myasthenia gravis