<prompt> The drug used to treat dry mouth in cancer chemotherapy isOxotremorineMethacholineCevimelinePilocarpine  <response>: Cevimeline increase salivary secretions and has a specific use in Sjogrens and xerostomia It is a parasympathomimitic and muscarinic agonist with paicular actions on M1 and M3 receptors. Ref: HL Sharma.3rd ed. Pg 138 