Methacholine

Methacholine (INN, USAN) (trade name Provocholine), also known as Acetyl-β-methylcholine, is a synthetic choline ester that acts as a non-selective muscarinic receptor agonist in the parasympathetic nervous system. Contents 1 Medical uses 2 Pharmacology 3 Contraindications 4 References 5 External links Medical uses Methacholine is primarily used to diagnose bronchial hyperreactivity,[1] which is the hallmark of asthma and also occurs in chronic obstructive pulmonar... [wikipedia]