What is "pyridostigmine"

n. A parasympathomimetic and reversible cholinesterase inhibitor, used to treat muscle weakness and to combat the effects of curariform drug toxicity.

Pyridostigmine is a parasympathomimetic and a reversible cholinesterase inhibitor. Since it is a quaternary amine, it is poorly absorbed in the gut and cannot penetrate across the blood–brain barrier.

It is on the WHO Model List of Essential Medicines, the most important medications needed in a basic health system.