ATC Group: A03AB Synthetic anticholinergics, quaternary ammonium compounds

Glycopyrronium is an inhaled long-acting muscarinic receptor antagonist (anticholinergic) for once-daily maintenance bronchodilator treatment of COPD. Glycopyrronium works by blocking the bronchoconstrictor action of acetylcholine on airway smooth muscle cells, thereby dilating the airways.

Otilonium bromide is endowed with a marked spasmolytic action on the smooth muscle of the digestive tract.