tiotropium

noun

ti·​o·​tro·​pi·​um ˌtī-ō-ˈtrō-pē-əm 

variants or tiotropium bromide

: an anticholinergic drug administered by oral inhalation in the form of its bromide C₁₉H₂₂NO₄S₂Br·H₂O as a bronchodilator in the treatment of chronic obstructive pulmonary disease

Tiotropium is a once-daily, inhaled anticholinergic drug that provides at least 24-hour improvements in airflow and hyperinflation in patients with COPD.

—Donald P. Tashkin et al., The New England Journal of Medicine

Note: Tiotropium is marketed under the trademark Spiriva.