Pyridostigmine is a medication primarily used to treat myasthenia gravis, a condition that causes muscle weakness. It works by inhibiting the enzyme acetylcholinesterase, which breaks down the neurotransmitter acetylcholine. This leads to increased levels of acetylcholine at the neuromuscular junction, improving communication between nerves and muscles. Additionally, pyridostigmine is sometimes used as a preventive treatment against nerve gas exposure in military personnel. It helps to enhance muscle strength and endurance, making it beneficial for individuals with certain neuromuscular disorders. The medication is typically taken orally and may have side effects, including gastrointestinal discomfort.