The story
From i(so)pr(opyl) + atrop(ine) + -ium (“quaternary ammonium compound”).
Etymology from Wiktionary, CC BY-SA 4.0.
ipratropium
Today it means: An anticholinergic drug C₂₀H₃₀NO₃⁺ that is used as an inhalational aerosol for bronchodilation especially in the treatment of chronic obstructive pulmonary disease and as a nasal spray in the treatment of runny nose associated with rhinitis. Full definition →