Wiktionary
betahistine
n. An antivertigo drug.
Wikipedia
Betahistine
Betahistine dihydrochloride (brand names Veserc, Serc, Hiserk, Betaserc, Vergo) is an anti- vertigo drug. It is commonly prescribed for balance disorders or to alleviate vertigo symptoms associated with Ménière's disease.
It was first registered in Europe in 1970 for the treatment of Ménière's disease.