This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Which drug is used in treatment of veigo 
Select and explain. 
A. Cinnarizine, B. Metoclopramide, C. Cisapride, D. None
A: Cinnarizine
Answer: A: Cinnarizine 
Explanation: Ans. is 'a' i.e., Cinnarizine Veigo is due to labyrinthine disorder and the impulse utilizes cholinergic muscarinic and H1 histamic receptors (similar to motion sickness). So, the drugs used are antimuscarinic, phenothiazines (phenothiazines have anticholinergic propey) and antihistaminics. Cinnarizine (act by inhibiting influx of Ca" into endolymph) and betahistine. (a histamine) analogue improve blood circulation to the inner ear can be used in Meniere's disease.