What is the preferred class of medication for management of myasthenia gravis?

• A. Anticholinesterase drugs: neostigmine (Prostigmin) and pyridostigmine (Mestinon)
• B. Immunosuppressants
• C. Levodopa
• D. Muscle relaxants

Answer: (A)

Managing myasthenia gravis hinges on improving neuromuscular transmission by increasing acetylcholine at the motor end plate. Anticholinesterase drugs, such as pyridostigmine and neostigmine, block the enzyme that breaks down acetylcholine, raising its level at the neuromuscular junction. This enhances the stimulus to the muscle and reduces fatigable weakness, which is the hallmark of MG.

Pyridostigmine is the typical first-line maintenance option because it is taken orally, has a suitable duration of action, and provides steady, predictable symptom relief. Neostigmine is useful when rapid improvement is needed or during a crisis, since it can be given by injection and acts quickly. These drugs are used for symptomatic management and are favored for initial treatment.

Immunosuppressants, while important for long-term control of the autoimmune process, take longer to become effective and carry significant systemic risks; they’re usually added when symptoms persist despite anticholinesterase therapy or after thymectomy. Levodopa and muscle relaxants do not address the underlying problem in MG and can worsen weakness or not provide meaningful benefit.