Wiktionary
drotaverine
alt. An antispasmodic drug, structurally related to papaverine. n. An antispasmodic drug, structurally related to papaverine.
Wikipedia
Drotaverine
Drotaverine ( INN, also known as drotaverin) is an antispasmodic drug, used to enhance cervical dilation during childbirth.
It is structurally related to papaverine, is a selective inhibitor of phosphodiesterase 4, and has no anticholinergic effects.
It is available in Asian and Eastern European countries under several brand names, with No-Spa being one of them.