F 91 Pill — WHITE OVAL, 6mm — Ondansetron
| Imprint | F / 91 |
|---|---|
| Colour | WHITE |
| Shape | OVAL |
| Size | 6 |
| Strength | ONDANSETRON HYDROCHLORIDE 4 mg |
| Dosage form | Tablet, Film Coated |
| Manufacturer | PharmPak, Inc. |
| NDC | 54348-819 |
| Schedule | — |
| Availability | Prescription only |
| Ingredients | ONDANSETRON HYDROCHLORIDE[ONDANSETRON] |
What does this imprint mean?
The imprint "F 91" is a code stamped or printed on the tablet or capsule by the manufacturer, used to identify the drug, its strength and the maker.
Active ingredient
Ondansetron
Uses and warnings
Key safety concerns include: - Hypersensitivity reactions: "Hypersensitivity reactions, including anaphylaxis and bronchospasm" may occur; discontinue if suspected - QT prolongation: Risk of serious cardiac arrhythmias; avoid in congenital long QT syndrome; ECG monitoring recommended for at-risk patients - Serotonin syndrome: Risk when combined with serotonergic drugs (SSRIs, SNRIs, tramadol, others); monitor for mental status changes and neuromuscular symptoms - Bowel obstruction masking: May mask progressive ileus and gastric distension post-surgery
Ondansetron tablets are indicated for preventing nausea and vomiting associated with: - Highly emetogenic cancer chemotherapy (including cisplatin ≥50 mg/m²) - Moderately emetogenic cancer chemotherapy courses - Radiotherapy involving total body irradiation or abdominal radiation - Postoperative nausea and/or vomiting
How to identify this pill
- • Check the imprint matches exactly: "F 91".
- • Confirm the colour (WHITE) and shape (OVAL).
- • Compare the size (6) against a ruler if possible.
- • When in doubt, confirm with a pharmacist before taking any medication.
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Official references
Source: FDA Structured Product Label via NLM Pillbox archive (retired 2021); source file 90910cd1-e114-6803-e053-2a95a90a730b.xml