Neostigmine: The Medication for Myasthenia Gravis and Postoperative Ileus
What is Neostigmine?
Neostigmine is a cholinesterase inhibitor used to treat myasthenia gravis (a neuromuscular disorder) and postoperative ileus (a condition where the bowel does not function properly after surgery). It works by increasing the levels of acetylcholine at neuromuscular junctions, improving muscle strength and bowel motility.
How Neostigmine Works
Neostigmine inhibits the enzyme acetylcholinesterase, which breaks down acetylcholine. By preventing the breakdown of acetylcholine, Neostigmine increases the amount of this neurotransmitter available to stimulate muscle contraction.
When to Use Neostigmine
● Myasthenia Gravis: Neostigmine helps improve muscle strength by enhancing neuromuscular transmission.
● Postoperative Ileus: It is used to stimulate bowel motility after surgery to prevent or treat intestinal obstruction.
Dosage
● Adult Dose for Myasthenia Gravis: 15 mg to 30 mg orally, divided into 2-4 doses daily.
● Adult Dose for Postoperative Ileus: 0.5 mg to 2 mg intravenously, as needed, to stimulate bowel motility.
Side Effects
● Common Effects: Nausea, vomiting, diarrhea, and increased salivation.
● Serious Adverse Effects: Bradycardia (slow heart rate), severe abdominal cramping, and respiratory distress.