Patient Leaflet Updated 15-Sep-2025 | Morningside Healthcare Ltd
Ondansetron 4 mg & 8 mg Orodispersible tablets
Ondansetron
4 mg and 8 mg Orodispersible Tablets
1. What Ondansetron Orodispersible Tablets are and what they are used for
2. What you need to know before you take Ondansetron Orodispersible Tablets
3. How to take Ondansetron Orodispersible Tablets
4. Possible side effects
5. How to store Ondansetron Orodispersible Tablets
6. Contents of the pack and other information
Ondansetron Orodispersible Tablets contain a medicine called ondansetron. This belongs to a group of medicines called anti-emetics. Ondansetron Orodispersible Tablets are a special type of tablets that dissolves very quickly when put on top of the tongue.
Ondansetron Orodispersible Tablets are used for:
Ask your doctor, nurse or pharmacist if you would like any further explanation about these uses.
Talk to your doctor, nurse or pharmacist before taking Ondansetron Orodispersible Tablets if:
If you are not sure if any of the above applies to you, talk to your doctor, nurse or pharmacist before taking Ondansetron Orodispersible Tablets.
Tell your doctor, nurse or pharmacist if you are taking, have recently taken or might take any other medicines. This includes medicines that you buy without a prescription and herbal medicines. This is because Ondansetron Orodispersible Tablets can affect the way some medicines work. Also some other medicines can affect the way Ondansetron Orodispersible Tablets works.
In particular, tell your doctor, nurse or pharmacist if you are taking any of the following medicines:
If you are not sure if any of the above applies to you, talk to your doctor, nurse or pharmacist before having Ondansetron Orodispersible Tablets.
Tell your doctor or pharmacist immediately if you get any of these symptoms during and after the treatment Ondansetron Orodispersible Tablets
Only use during the first trimester of pregnancy after discussion with your doctor of the potential benefits and risks to you and your unborn baby of the different treatment options. This is because Ondansetron Orodispersible Tablets can slightly increase the risk of a baby being born with cleft lip and/or cleft palate (openings or splits in the upper lip and/or the roof of the mouth). If you are already pregnant, think you might be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking Ondansetron Orodispersible Tablets. If you are a woman of childbearing potential you may be advised to use effective contraception.
Do not breast-feed if you are taking Ondansetron Orodispersible Tablets. This is because small amounts pass into the mother’s milk.
Ondansetron Orodispersible Tablets should not affect your ability to drive or operate machinery. However, if you feel dizzy or drowsy or unable to concentrate after taking Ondansetron Orodispersible Tablets, do not drive or operate machinery until these effects wear off.
This medicine contains aspartame (which is a source of phenylalanine). If you have an inherited illness called phenylketonuria speak to your doctor before taking this medicine.
Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure. The dose you have been prescribed will depend on the treatment you are having.
Place the orodispersible tablet on top of the tongue, where it will disperse quickly and then swallow.
On the day of chemotherapy or radiotherapy:
On the following days:
Children aged over 6 months and adolescents:
The doctor will decide the dose depending on the child’s size (body surface area) or weight. Look at the label for more information.
The usual adult dose is 16 mg before your operation.
Children aged over 1 month and adolescents:
Tablets are not a suitable dosage form for this age group.
Ondansetron in injectable form is recommended for children aged over 1 month and adolescents.
The total daily dose should not be more than 8 mg.
Ondansetron Orodispersible Tablets should start to work within one or two hours of taking a dose.
If you continue to feel sick, tell your doctor or nurse.
If you or your child accidentally take more Ondansetron Orodispersible Tablets than you should, contact your doctor at once or go to the nearest hospital casualty department. Always take the labelled medicine package with you, whether there are any Ondansetron Orodispersible Tablets left or not.
If you miss a dose and feel sick or vomit:
If you miss a dose but do not feel sick:
Do not stop taking Ondansetron Orodispersible Tablets unless your doctor tells you to.
If you have any further questions on the use of this medicine, ask your doctor or pharmacist.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
If you have an allergic reaction, stop taking it and see a doctor straight away. The signs may include:
Very common (may affect more than 1 in 10 people)
Common (may affect up to 1 in 10 people)
Uncommon (may affect up to 1 in 100 people)
Rare (may affect up to 1 in 1,000 people)
Very rare (may affect up to 1 in 10,000 people)
If you get any side effects, talk to your doctor, nurse or pharmacist This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.
By reporting side effects you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not use this medicine after the expiry date which is stated on the blister and carton after ‘EXP’. The expiry date refers to the last day of that month.
This medicinal product does not require any special storage conditions.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
The active substance is ondansetron. Each orodispersible tablet contains 4mg or 8mg ondansetron.
The other ingredients are: mannitol, silica, colloidal anhydrous, basic butylated methacrylate copolymer, mannitol granular, crospovidone, aspartame (E951), flavour-strawberry and magnesium stearate.
Ondansetron 4mg Orodispersible Tablets are round, white to off-white, flat, bevelled edged, tablets plain on both the surfaces, having strawberry odour.
Ondansetron 8mg Orodispersible Tablets are round, white to off-white, flat, bevelled edged, tablets plain on one surface and “8” engraved on opposite surface, having strawberry odour.
Ondansetron Orodispersible Tablets are available in blisters of 7, 10, 14, 15, 20, 28, 30, 56, 60, 84, 90, 100, 112 and 120.
Not all pack sizes may be marketed.
This leaflet was last revised in April 2025.
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http://www.morningsidehealthcare.com
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+44 (0)116 204 5950