Which drug is used to perform the myasthenia gravis test?

The drug used to perform the myasthenia gravis test is Edrophonium. This medication is a short-acting anticholinesterase agent that temporarily increases levels of acetylcholine at the neuromuscular junction by inhibiting its breakdown. When administered to a patient suspected of having myasthenia gravis, a significant improvement in muscle strength within a few minutes suggests a positive test result for the condition. This rapid response helps differentiate myasthenia gravis from other neuromuscular disorders.

While Pyridostigmine and Neostigmine are also anticholinesterase medications used to manage symptoms of myasthenia gravis, they are not typically utilized for the diagnostic test itself. Atropine, on the other hand, is an anticholinergic drug and does not play a role in testing for myasthenia gravis. Thus, Edrophonium is the correct choice for performing the myasthenia gravis test due to its specific properties and rapid onset.