pms-Ondansetron is a prescription antiemetic tablet from Pharmascience, supplied as a 1 x 10-tablet blister pack. Each film-coated tablet contains 4 mg of ondansetron base as ondansetron hydrochloride dihydrate. The formulation includes carefully selected excipients and a yellow film coating for consistent oral administration. DIN 02258188. Prescription required in Canada, including Quebec.