How to Manage Chemotherapy-Induced Nausea and Vomiting With Proper Care and Medication

Chemotherapy is physically draining, and nausea can make an already difficult time even more so. The mere thought of eating, of drinking water or of getting ready for another treatment session can be quite uncomfortable when the sickness is coming back.

The good news is that CINV (chemotherapy-induced nausea and vomiting) can frequently be prevented or minimised with the appropriate medicines and supportive care. The exact approach will depend on the chemotherapy regimen being used, the patient's history of nausea and their general health.

Managing nausea is about more than feeling comfortable. It can help patients stay hydrated, eat enough, and continue their cancer treatment as prescribed.

Key Takeaways

Why does chemotherapy cause nausea and vomiting?

Chemo medicines target rapidly dividing cells, but they can also affect nerves in the gut and the signals to the brain, which can lead to nausea and vomiting.

The risk of these side effects varies. Some chemo regimens are inherently more likely to cause side effects than others, and of course the dose, the combination of meds and the individual's own sensitivity all play a part.

Symptoms may appear in different ways:

• Acute nausea: starts within the first 24 hours after chemo.

• Delayed nausea: occurs more than 24 hours after treatment and can persist for several days.

• Anticipatory nausea: occurs prior to a treatment session, often as a result of having been very sick during earlier sessions.

• Breakthrough nausea: occurs despite prophylaxis.

Recognizing the pattern helps the oncology team decide whether the current treatment plan needs modification.

How can you manage nausea during chemotherapy?

Simple changes to your eating and drinking habits can make day-to-day life much easier. They don't replace your prescribed medication; they can be used in addition to it.

1. Eat smaller meals throughout the day

Large meals can be daunting when your appetite is low. Try eating smaller amounts more frequently rather than waiting until you're really hungry.

Plain rice, toast, crackers, porridge, bananas or other similar foods may be easier to tolerate. Choose foods you're comfortable with, and that meet your appetite and dietary requirements, rather than forcing yourself to eat a big meal.

2. Drink fluids in small, regular amounts

Vomiting can lead to dehydration, which can in turn lead to dizziness, weakness and reduced urine output. If it's difficult to drink a full glass, have small sips of water or another appropriate fluid throughout the day.

If you can't keep fluids down, contact your treatment team straight away. You may need a medical assessment and/or fluids given through a vein.

3. Reduce food smells and other triggers

Strong cooking smells can be a trigger for nausea in some people. Cooler foods (with less aroma) are likely to be better, and good ventilation is important. Sometimes the only solution is to ask someone else to cook.

Resting in a comfortable position after eating, along with slow breathing or relaxation exercises, can also help. If nausea is starting up before the treatment due to anxiety or previous experiences, then it's worth telling your oncology team. Psychological support and specific treatment may help in such cases.

Which preventative medications help with chemotherapy-induced nausea?

Preventive meds (the antiemetics) are an essential component of supportive cancer care. They work through different aetiological pathways involved in nausea and vomiting. The specific antiemetic(s) that are prescribed will depend on the chemotherapy regimen. It could be one medicine or a combination.

Common options include:

• Serotonin (5-HT3) receptor antagonists: medicines such as palonosetron and ondansetron, which block serotonin signals involved in vomiting.

• Neurokinin-1 (NK1) receptor antagonists: medicines such as netupitant, which block substance P (a chemical mediator in the vomiting reflex). Nykron tablet combi pack, for example, has both netupitant and palonosetron

• Corticosteroids: Dexamethasone is generally used in combination with other antiemetics.

• Olanzapine: Can be part of a preventative regimen in certain circumstances, particularly where the chemo is likely to cause severe nausea and vomiting.

What if nausea continues despite medication?

Some patients will still be nauseated even if they're taking their medication as prescribed. That doesn't mean they have to put up with it.

Keep a simple record of when the nausea starts, how often you vomit, what medication you've taken and whether you can eat or drink. Pass this on to your doctor or oncology nurse.

The team may review the chemotherapy-related risk, adjust the preventative combination, or prescribe a different medication for breakthrough symptoms. Other aetiologies (constipation, infection, side effects of other medications, etc.) would also be considered.

If vomiting is continuing, fluids won't stay down, urine output becomes very low, you're getting very dizzy or confused, then you need to get urgent medical advice. Fever during chemo also needs to be dealt with promptly in accordance with the emergency instructions from your cancer team.

Conclusion

Nausea/Vomitting can impact sleep, appetite, energy and confidence for the next session. Tell your care team about any symptoms early, even if they seem mild.

With the right preventive medicines, sensible changes at home and regular contact with the oncology team, many people can manage these side effects much more effectively. The goal is to make treatment as tolerable as possible while protecting hydration, nutrition, and overall well-being.

Medical Disclaimer: This article is intended for general educational purposes only. It is not a substitute for professional medical advice, diagnosis or treatment. Consult a qualified healthcare professional for guidance based on your symptoms and medical history.