Oral Tablets
OndansetronGeneric Zofran
A selective 5-HT₃ receptor antagonist used to prevent and treat nausea and vomiting.
- Selective 5-HT₃ receptor antagonist
- Effective against medication-, anesthesia-, and GI-related nausea
- Commonly prescribed alongside GLP-1 therapies
- 4 mg tablets, dosed every 8 hours as needed
About the ingredient
Ondansetron
A selective serotonin 5-HT₃ receptor antagonist that prevents activation of vomiting reflexes in the CNS and GI tract.
Ondansetron is a selective 5-HT₃ receptor antagonist used to prevent and treat nausea and vomiting caused by medications, anesthesia, or gastrointestinal disturbances. By blocking serotonin receptors in both the central nervous system and the gastrointestinal tract, Ondansetron effectively reduces the urge to vomit and improves comfort in patients experiencing nausea due to GLP-1 therapies, anesthesia, or other medical treatments.
This medication is well-tolerated, fast-acting, and commonly prescribed as part of supportive care regimens in clinical and telehealth settings.
5-HT₃ blockade
Ondansetron blocks serotonin from binding to 5-HT₃ receptors on vagal afferents and in the chemoreceptor trigger zone, breaking the nausea signal cascade.
GLP-1 supportive care
A common adjunct during GLP-1 initiation and dose titration, when transient nausea is most likely.
Fast onset, well-tolerated
Oral ondansetron typically begins to work within 30 minutes and has a favorable side-effect profile for short-term use.
How to take
A consistent routine matters.
Follow the specific directions from your healthcare provider. These steps are a general reference for oral tablets administration.
- 1
Take one tablet (4 mg) by mouth every 8 hours as needed for nausea or vomiting.
- 2
Take at the same time each day to maintain steady levels.
- 3
Swallow whole with a full glass of water; do not crush or chew unless directed.
- 4
If you miss a dose, take it as soon as you remember unless it's close to the next scheduled dose — never double up.
- 5
Store at room temperature, away from heat, moisture, and direct sunlight.
Product Details
Available formulations
| Strength | Form | Quantity |
|---|---|---|
| 4 mg | Tablets | As prescribed |
Typical dosage & titration
Recommended titration schedule
Reference schedule only — your provider may adjust the timing or dose based on your individual response and lab work.
| Weeks | MG | SIG / Directions |
|---|---|---|
| Daily | 4 mg daily | Take one tablet (4 mg) by mouth every 8 hours as needed for nausea or vomiting. |
FAQ
Frequently asked questions
Provider workflow
Ready to prescribe Ondansetron?
Submit a prescription through the Logos RX provider portal, or reach out to our pharmacy team for formulary, dosing, or patient-onboarding questions.
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