Pyridostigmine affects chemicals in the body that are involved in the communication between nerve impulses and muscle movement. Pyridostigmine is used to treat the symptoms of myasthenia gravis. It is also used in military personnel who have been exposed to nerve gas. Pyridostigmine may also be used for purposes not listed in this medication guide.
Mestinon works to prevent the breakdown of acetylcholine, a substance naturally occurring in the body. This permits free transmission of nerve impulses across the neuromuscular junction. This helps preserve and aid muscle function - acetylcholine is, in fact, necessary for proper muscular function. Its deterioration is sometimes caused by certain medical conditions.