5HT3 receptor antagonists
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Zofran Dosage

Drug Detail:Zofran (injection) (Ondansetron (injection) [ on-dan-se-tron ])

Generic Name: ONDANSETRON HYDROCHLORIDE 4mg

Dosage Form: tablet

Drug Class: 5HT3 receptor antagonists

Contents
Uses Warnings Before Taking Dosage Side effects Interactions

Dosage

The recommended dosage regimens for adult and pediatric patients are described in Table 1 and Table 2, respectively.

Corresponding doses of ZOFRAN tablets, ZOFRAN ODT® orally disintegrating tablets and ZOFRAN oral solution may be used interchangeably.

Table 1: Adult Recommended Dosage Regimen for Prevention of Nausea and Vomiting

Indication

Dosage Regimen

Highly

Emetogenic

Cancer Chemotherapy

A single 24-mg dose administered 30 minutes before the start of single-day highly emetogenic chemotherapy, including cisplatin greater than or equal to 50 mg/m2.

Moderately Emetogenic

Cancer Chemotherapy

8 mg administered 30 minutes before the start of chemotherapy, with a subsequent 8-mg dose 8 hours after the first dose.

Then administer 8 mg twice a day (every 12 hours) for 1 to 2 days after completion of chemotherapy.

Radiotherapy

For total body irradiation: 8 mg administered 1 to 2 hours before each fraction of radiotherapy each day.

For single high-dose fraction radiotherapy to the abdomen: 8 mg administered 1 to 2 hours before radiotherapy, with subsequent 8-mg doses every 8 hours after the first dose for 1 to 2 days after completion of radiotherapy.

For daily fractionated radiotherapy to the abdomen: 8 mg administered 1 to 2 hours before radiotherapy, with subsequent 8-mg doses every 8 hours after the first dose for each day radiotherapy is given.

Postoperative

16 mg administered 1 hour before induction of anesthesia.
Table 2: Pediatric Recommended Dosage Regimen for Prevention of Nausea and Vomiting

Indication

Dosage Regimen

Moderately Emetogenic Cancer Chemotherapy

12 to 17 years of age: 8 mg administered 30 minutes before the start of chemotherapy, with a subsequent 8-mg dose 8 hours after the first dose.

Then administer 8 mg twice a day (every 12 hours) for 1 to 2 days after completion of chemotherapy.

4 to 11 years of age: 4 mg administered 30 minutes before the start of chemotherapy, with a subsequent 4-mg dose 4 and 8 hours after the first dose.

Then administer 4 mg three times a day for 1 to 2 days after completion of chemotherapy.

Dosage in Hepatic Impairment

In patients with severe hepatic impairment (Child-Pugh score of 10 or greater), do not exceed a total daily dose of 8 mg [see Use in Specific Populations (8.6), Clinical Pharmacology (12.3)].

Administration Instructions for ZOFRAN ODT Orally Disintegrating Tablets

Do not attempt to push ZOFRAN ODT orally disintegrating tablets through the foil backing. With dry hands, PEEL BACK the foil backing of 1 blister and GENTLY remove the tablet. IMMEDIATELY place the ZOFRAN ODT orally disintegrating tablet on top of the tongue where it will dissolve in seconds, then swallow with saliva. Administration with liquid is not necessary.

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