Tavist

clemastine

A sedating antihistamine and anticholinergic used for managing allergic rhinitis and hay fever.
Adverse effects
CNS depression or stimulation; the latter is more common in children and may be accompanied by excitement, hallucinations, ataxia, incoordination, spasms, athetosis, hyperthermia, cyanosis, hyperreflexia and cardiorespiratory arrest.