Myasthenia gravis is prohibited or cautious drugs: a. For patients with myasthenia gravis who need antibiotics, according to different adaptable strains, the available ones are vincristine, penicillin, chloramphenicol, erythromycin, spiramycin and madicam, and anesthetics available such as: nufocaine (procaine), laughing oxygen, cyclopropane. Sedatives available are omitted, penicillin should be tested first. Second, if the above antibiotics are ineffective can be used with caution aminoglycoside antibiotics, new, kana, gentamicin, balomycin. But must be used with new Stimmin class drugs, and correspondingly increase the dosage of the latter. The tetracyclines should be used with more caution. Third, it is best not to use polymyxins, do not use two antibiotics that have a blocking effect on the neuromuscular junction at the same time, do not apply muscle relaxants, anesthetics and sleeping sedatives at the same time, do not use mucosal and plasma membrane drug delivery methods. Fourth, the application of antibiotics that have a blocking effect on the neuromuscular junction is not advisable for patients with renal disease and poor renal function in myasthenia gravis. V. Fluoroquinolones such as haloperidol can also aggravate the symptoms of myasthenia gravis and should be used with caution. Other: quinine, quinidine, chloroform, arrow poison, ether, succinamide. Succinylcholine, morphine, cocaine, sleeper, chloral hydrate, luminal, ambien, dulcolax, viomycin, barbiturate, procainamide, lidocaine, insulin.