Methacholine bromide CAS NO.333-31-3

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Methacholine bromide is a pharmaceutical drug used in the respiratory system to diagnose asthma. It functions as a muscarinic receptor agonist, leading to bronchoconstriction and airway hyperresponsiveness. Methacholine challenge test is conducted to establish a clinical diagnosis in individuals who exhibit normal FEV1 values but still suffer from asthma-like symptoms.