Stop vomiting and nausea instantly with ONDEYU-4. A fast-acting Ondansetron 4mg tablet ideal for motion sickness, food poisoning, and stomach upset.
Category Name Gastro / Anti-Emetic
Common Indications ONDEYU-4 is indicated for the prevention and treatment of nausea and vomiting associated with various medical conditions. It is commonly prescribed for:
- Nausea and vomiting induced by chemotherapy (cancer drug therapy)
- Nausea and vomiting associated with radiotherapy
- Post-operative nausea and vomiting following surgical procedures
- Nausea and vomiting due to stomach upset and gastrointestinal disturbances
- Prevention of delayed nausea and vomiting in patients undergoing cancer treatment
Common Dosings One tablet (4 mg) orally, up to three times daily — or as directed by your physician. The dose and frequency may vary depending on the underlying condition, the type of treatment being received, and the patient's clinical response. For chemotherapy or surgery-related nausea, the first dose is typically administered 30 minutes before the procedure. Always follow the dosing schedule prescribed by your doctor.
Common Side Effects The following side effects may occur during the course of treatment. Consult your doctor if any of these persist or worsen:
- Headache
- Dizziness
- Mild constipation
- Abdominal discomfort
- Low blood pressure (hypotension)
- Slow heart rate (bradycardia)
- Chest pain — seek immediate medical attention if experienced
- Allergic reactions such as rash, itching, or swelling — seek immediate medical attention if severe
Common Interactions Inform your doctor about all medications, supplements, and herbal products you are currently taking. Notable interactions include:
- Serotonergic Drugs (SSRIs, SNRIs, Antidepressants): Concurrent use may increase the risk of serotonin syndrome, characterised by agitation, excessive sweating, and rapid heartbeat — seek immediate medical attention if these symptoms occur
- QT-Prolonging Drugs (Antipsychotics, Antiarrhythmics): Combined use may increase the risk of abnormal heart rhythms — use only under strict medical supervision
- Antiepileptic Drugs (Phenytoin, Carbamazepine): May accelerate the metabolism of Ondansetron, reducing its therapeutic effectiveness
- Rifampicin (Antibiotic): May increase the metabolism of Ondansetron and reduce its efficacy
- CNS Depressants / Alcohol: May enhance dizziness or sedation — use with caution
Special Instructions
| Condition | Guidance |
|---|---|
| Pregnancy | Not recommended during pregnancy. Positive evidence of foetal risk has been observed in animal studies. Use only if the potential benefit outweighs the risk — strictly under medical supervision. |
| Breastfeeding | Use with caution during lactation. Consult your doctor before use to assess the benefit-risk profile for both mother and infant. |
| Alcohol | Alcohol does not usually cause harmful interactions with this medicine; however, caution is advised as it may enhance dizziness or sedation in some patients. |
| Driving & Machinery | Dizziness may occur with this medicine. Avoid driving or operating heavy machinery if you feel dizzy or lightheaded after taking this tablet. |
| Liver Disease | Use with caution in patients with severe hepatic impairment. Dose adjustment may be required — consult your physician. |
| Kidney Disease | Use with caution in patients with severe renal impairment. Dose adjustment may be required — consult your physician. |
Mechanism of Action ONDEYU-4 contains Ondansetron, a selective serotonin 5-HT3 receptor antagonist. It works by blocking 5-HT3 receptors located both in the central nervous system (CNS) and in the peripheral nervous system, with primary activity in the gastrointestinal tract. During chemotherapy, radiotherapy, or surgery, serotonin is released from enterochromaffin cells in the gut, triggering the vomiting reflex through vagal nerve stimulation and direct action on the brain's vomiting centre. By selectively blocking these receptors, Ondansetron prevents serotonin from initiating the nausea and vomiting response, providing effective and targeted antiemetic relief.
Instructions to Take
- Take this tablet exactly as prescribed by your doctor
- May be taken with or without food; however, taking it with food may help reduce stomach discomfort
- For chemotherapy or surgery-related nausea, take the first dose 30 minutes before the procedure as directed by your physician
- Swallow the tablet whole with a full glass of water — do not crush, split, or chew
- Take at regular intervals as prescribed to maintain consistent drug levels in the body
- Do not self-medicate, adjust the dose, or discontinue therapy without medical advice
- If a dose is missed, take it as soon as you remember — however, skip the missed dose if it is almost time for the next scheduled dose. Do not double the dose to make up for a missed one
- Keep out of reach of children
- Store in a cool, dry place away from direct sunlight and moisture
Disclaimer: This information is intended for general reference purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before starting, changing, or stopping any medication.
