Wiktionary
cyclizine
n. A particular antihistamine used to treat motion sickness.
Wikipedia
Cyclizine
Cyclizine is an antihistamine drug used to treat nausea, vomiting and dizziness associated with motion sickness, vertigo and post-operatively following administration of general anaesthesia and opioids.
It is on the World Health Organization's List of Essential Medicines, the most important medications needed in a basic health system.