Guanidine is used to treat muscle weakness caused by a rare condition called Lambert-Eaton myasthenic syndrome (LEMS). This medication has been discontinued and is no longer available in the United States.
Lambert-Eaton myasthenic syndrome (LEMS)
By signing up, I agree to GoodRx's Terms and Privacy Policy, and to receive marketing messages from GoodRx.
Research prescriptions and over-the-counter medications from A to Z, compare drug prices, and start saving.