ONDANSETRON HYDROCHLORIDE ![]() (on-dan'si-tron) ![]() Zofran, Zofran ODT Classifications: antiemetic; 5-ht3 antagonist; Therapeutic: antiemetic; serotonin (ht3) antagonist Pregnancy Category: B |
4 mg, 8 mg, 16 mg, 24 mg tablets; 4 mg, 8 mg orally disintegrating tablets; 4 mg/5 mL oral solution; 2 mg/mL, 8 mg/50 mL, 32 mg/50 mL injection
Selective serotonin (5-HT3) receptor antagonist. Serotonin receptors are located centrally in the chemoreceptor trigger zone (CTZ) and peripherally on the vagal nerve terminals. Serotonin is released from the wall of the small intestine and stimulates the vagal efferent nerves through the serotonin receptors and initiates the vomiting reflex.
Prevents nausea and vomiting associated with cancer chemotherapy and anesthesia.
Prevention of nausea and vomiting associated with initial and repeated courses of cancer chemotherapy, including high-dose cisplatin; postoperative nausea and vomiting.
Treatment of hyperemesis gravidarum
Hypersensitivity to ondansetron; children <4 y (PO route).
Hepatic disease; QT prolongation; PKU; pregnancy (category B), lactation.
Prevention of Chemotherapy-Induced Nausea and Vomiting Adult: PO 824 mg 30 min before chemotherapy, then q8h times 2 more doses IV 32 mg or three 0.15 mg/kg doses starting 30 min before chemotherapy, then 4 and 8 h after Adult/Child (6 mo18 y): IV 0.15 mg/kg infused over 15 min beginning 30 min before start of chemotherapy, then 4 and 8 h after first dose of ondansetron Child (>4 y): PO 4 mg 30 min before chemotherapy, then q8h times 2 more doses Nausea & Vomiting with Highly Emetogenic Chemotherapy Adult: PO Single 24 mg dose 30 min before administration of single-day highly emetogenic chemotherapy Postoperative Nausea and Vomiting Adult: PO 816 mg 1 h preoperatively IM/IV 4 mg injected immediately prior to anesthesia induction or once postoperatively if patient experiences nausea/vomiting shortly after surgery Child: IV 1 mo12 y, <40 kg, 0.1 mg/kg 1 mo12 y, >40 kg, 4 mg dose Hepatic Impairment Child-Pugh class C: maximum dose 8 mg/d |
Intravenous PREPARE: Direct for Post-Op N&V: May be given undiluted. IV Infusion for Chemo-Induced N&V: Dilute a single does in 50 mL of D5W or NS. May be further diluted in selected IV solution. ADMINISTER: Direct: Give over at least 30 sec, 25 min preferred. IV Infusion: Give over 15 min. When three separate doses are administered, infuse each over 15 min. INCOMPATIBILITIES Solution/additive: Meropenem. Y-site: Acyclovir, allopurinol, aminophylline, amphotericin B, amphotericin B cholesteryl, ampicillin, ampicillin/sulbactam, amsacrine, cefepime, cefoperazone, fluorouracil, furosemide, ganciclovir, lorazepam, meropenem, methylprednisolone, piperacillin, sargramostim, sodium bicarbonate, TPN. |
Assessment & Drug Effects
Patient & Family Education