Also known as Hismanal
Astemizole (R43512, marketed under the brand name Hismanal) was a second-generation antihistamine drug that has a long duration of action. Astemizole was discovered by Janssen Pharmaceutica in 1977. It has been withdrawn from the market in most countries because of rare but potentially fatal side effects (QTc interval prolongation and related arrhythmias due to hERG channel blockade).Source: Wikipedia
Patients are most commonly prescribed astemizole to treat pick disease, rabies, west nile virus, and blastomycosis.