Ondansetron

Ondansetron — Uses and Benefits

Ondansetron is mainly used to control nausea and vomiting.

WHAT THIS MEDICINE IS USED FOR

• Preventing and treating nausea and vomiting caused by cancer chemotherapy
• Preventing and treating nausea and vomiting caused by radiotherapy
• Preventing and treating nausea and vomiting after surgery
• Sometimes used for severe vomiting in other conditions, as advised by a doctor

HOW IT WORKS

• Blocks a natural substance called serotonin in the gut and brain that can trigger vomiting
• Reduces signals sent to the brain's vomiting centre
• Helps calm an upset stomach caused by strong triggers like chemotherapy drugs

WHAT IT IS NOT USED FOR

• Not used for regular motion sickness
• Not used as a general painkiller or digestive aid
• Not a treatment for the underlying cause of vomiting, such as infection or blockage
• Not meant for routine, everyday nausea without a specific medical cause

This medicine should be used only as advised by a doctor, especially since the underlying cause of vomiting needs to be identified and treated separately.

How to Use Ondansetron

HOW TO TAKE IT

• Take exactly as prescribed by your doctor, usually before chemotherapy, radiotherapy, or surgery
• Can be taken with or without food
• If using the orally disintegrating tablet, let it dissolve on the tongue without chewing or swallowing whole
• Do not increase or decrease the dose on your own
• Complete the full course as advised, even if you feel better

IF YOU MISS A DOSE

• Since this medicine is often taken around specific events like chemotherapy or surgery, follow your doctor's or nurse's instructions on timing
• If you miss a dose meant for regular use, take it as soon as you remember unless it is almost time for the next dose
• Do not double the dose to make up for a missed one
• Contact your doctor if you are unsure about a missed dose

STORAGE

• Store at room temperature, away from direct sunlight and moisture
• Keep out of reach of children
• Do not use after the expiry date printed on the pack
• Follow any special storage instructions given by your pharmacist for liquid forms

Ondansetron — Side Effects

COMMON SIDE EFFECTS

• Headache
• Constipation
• Feeling tired or weak
• Mild dizziness

LESS COMMON SIDE EFFECTS

• Dry mouth
• Flushing or feeling warm
• Mild abdominal pain
• Blurred vision for a short time

SERIOUS SIDE EFFECTS — STOP AND SEE A DOCTOR IMMEDIATELY

• Irregular or fast heartbeat, chest pain, or fainting
• Severe allergic reaction: swelling of face/lips/tongue, difficulty breathing, skin rash
• Sudden severe headache with vision changes
• Signs of serotonin syndrome: agitation, high fever, muscle stiffness, rapid heartbeat, confusion
• Severe constipation with stomach swelling or no bowel movement

This is not a complete list. Report any unusual or persistent symptom to your doctor or pharmacist.

Ondansetron — Safety Information and Precautions

This medicine is available only with a doctor's prescription in India.

DO NOT TAKE THIS MEDICINE IF YOU

• Are allergic to ondansetron or similar medicines
• Are also taking apomorphine (a medicine for Parkinson's disease), as this combination can cause serious low blood pressure

TELL YOUR DOCTOR BEFORE STARTING IF YOU

• Have heart problems, including irregular heartbeat or long QT syndrome
• Have liver disease
• Have low levels of potassium or magnesium in your blood
• Are pregnant, planning pregnancy, or breastfeeding
• Have a bowel blockage or severe constipation

MEDICINES THAT CAN INTERACT

• Medicines that affect heart rhythm, such as certain antibiotics and antidepressants
• Tramadol, as it may reduce pain relief and increase seizure risk
• Selective serotonin reuptake inhibitors (SSRIs) and other serotonin-affecting medicines, due to risk of serotonin syndrome
• Apomorphine
• Other medicines for nausea or vomiting, unless advised by a doctor

FREQUENTLY ASKED QUESTIONS

Can I take this medicine for motion sickness?

No, it is not intended for motion sickness; other medicines are better suited for that purpose.

Is it safe to drive after taking this medicine?

It may cause dizziness or tiredness in some people, so avoid driving until you know how it affects you.

Can children take this medicine?

• Yes, but only under a doctor's guidance with dosing based on the child's weight and condition.
• Doctor ya pharmacist se salah lein.