ACHE and myasthenia gravis: The first-line pharmacological treatment for MG is pyridostigmine (acetylcholinesterase inhibitor); indeed, 68 (95.8%) patients receive this drug as therapy. For patients who experience adverse drug reactions to the generic formulation of pyridostigmine, the innovative formulation (Mestinon®) was offered. Pyridostigmine treatment is frequently used in combination with a corticosteroid such as prednisone, which was the second most commonly used drug in this registry for 52 patients with MG (73.2%). The most frequently prescribed doses were 5 and 10 mg per day (46.5%).