<prompt> Drug used in aneliorative test for Myasthenia gravis isPhysostigmineEdrophoniumTacrinePyridostigmine  <response>: Drug used in amellorative test tensilon test for myasthena gavis is edrophonium. It is a cholinergic drug and can be used for diagnosis of myasthenia gravis becaise of its sho duration of action 10-30 min Ref-KDT 6e p104 