HYOSCINE
scopolamine, hyoscine
(noun) an alkaloid with anticholinergic effects that is used as a sedative and to treat nausea and to dilate the pupils in ophthalmic procedures; “transdermal scopolamine is used to treat motion sickness”; “someone sedated with scopolamine has difficulty lying”
Source: WordNet® 3.1
Noun
hyoscine (countable and uncountable, plural hyoscines)
Scopolamine.
Source: Wiktionary
Hy*os"cine, n. Etym: [See Hyoscyamus.] (Chem.)
Definition: An alkaloid found with hyoscyamine (with which it is also
isomeric) in henbane, and extracted as a white, amorphous, semisolid
substance.
Source: Webster’s Unabridged Dictionary 1913 Edition