<unk>  is an antihistamine and anticholinergic of the piperazine derivative family. It is considered to be an antiemetic, similar to meclizine.
In the United Kingdom,<unk>  is one of three drugs contained in Migraleve tablets, marketed by McNeil Healthcare at migraine sufferers.
Buclizine
Chlorcyclizine
Nabilone
Naratriptan
Sumatriptan 
Almotriptan
Frovatriptan
Zolmitriptan 