<unk>  is a muscarinic receptor antagonist, often referred to as an antimuscarinic or anticholinergic agent. Although it does not display selectivity for specific muscarinic receptors, when topically applied it acts mainly on M3 muscarinic receptors located on smooth muscle cells and submucosal glands. This leads to a reduction in smooth muscle contraction and mucus secretion and thus produces a bronchodilatory effect.
Tiotropium bromide
Fluticasone/salmeterol
Mometasone/formoterol
Beclometasone/formoterol
Fluticasone furoate
Fluticasone propionate
Theophylline
Roflumilast