Chemotherapy involves strong medications that eliminate cancer cells from the body. Because these medications target fast-dividing cells, anti-cancer medicines also negatively impact fast-dividing healthy cells; this includes cells in the stomach and brain. This article discusses side effects of chemotherapy that can trigger nausea and vomiting. Most patients will experience these side effects just shortly after chemotherapy is initiated. Doctors frequently prescribed anti-nausea medications for these side effects. While chemotherapy is effective in combating cancer, the anticancer effect comes along with a “sick” feeling that invariably makes a patient feel uncomfortable since it impinges on the body’s normal functions.
Why does chemotherapy cause nausea and vomiting?
Chemotherapy causes nausea and vomiting because it affects both cancer cells and healthy cells. These medicines target fast-growing cells. Cancer cells grow quickly, but so do some normal cells, especially in the stomach lining and brain. When chemotherapy damages these healthy cells, the body sends signals to the brain’s vomiting centre. These signals cause a person to feel sick, lose appetite and sometimes throw up.
Chemotherapy also affects a part of the brain that controls nausea. Some drugs cause the body to release chemicals like serotonin. When serotonin levels go up in the stomach and blood, the brain senses danger and triggers nausea and vomiting to protect the body. It is the body’s natural reaction to unwanted chemicals.
Which kinds of chemotherapy-induced nausea and vomiting (CINV) are there?
There are different types of chemotherapy-induced nausea and vomiting (CINV). Chemotherapy-induced nausea and vomiting can happen at different times and for different reasons. Here are the main types:
- Acute CINV:
This takes place in the initial twenty-four hours after chemotherapy and occurs frequently. - Delayed CINV:
This condition starts more than 24 hours after chemotherapy. It can last for a few days. - Anticipatory CINV:
This happens before chemotherapy. The patient feels sick just by thinking about the treatment, often from past experience. - Breakthrough CINV:
This happens even after taking anti-nausea medicine. The patient still feels sick and may vomit. - Refractory CINV:
This type does not get better even after using medicines in previous treatments.
Each type of chemotherapy-induced nausea and vomiting needs a different way to manage it. Doctors give specific medicines to help stop or reduce these side effects. Patients can recover and remain resilient during therapy with the right care.
Does every chemotherapy patient experience vomiting?
No, not every chemotherapy patient experiences vomiting. Each person’s body reacts differently to chemotherapy. Some people may feel very sick, while others may not vomit at all. Some people have delayed vomiting, which happens a day or two later. Vomiting usually happens because chemotherapy affects certain parts of the brain and stomach. These areas send signals to the brain that make a person feel sick or nauseous. Certain chemotherapeutic agents induce vomiting with greater frequency compared to other medications. It is variable based on many things, for example, what type of chemotherapy it is, how much medicine, the person’s health, and how their body reacts. To avoid or decrease vomiting, there will usually be medicines called antiemetics that will be given by the doctor.
Antiemetics function by obstructing the signals that trigger vomiting and nausea. These medicines are very helpful and allow many patients to eat and rest better. Sometimes, people may still feel a little sick just by thinking of chemotherapy (called anticipatory vomiting), but antiemetics reduce the chances of serious vomiting. Doctors choose the right antiemetics based on the patient’s needs. With the correct medicine and care, most people can manage nausea and vomiting during chemotherapy and feel more comfortable throughout treatment.
Can nausea from chemotherapy be prevented?
Yes, nausea from chemotherapy can be prevented or reduced with the right steps. Doctors can proactively mitigate nausea from chemotherapy treatment by giving patients special medicines called antiemetics. Patients usually take these medications before chemotherapy and, often, even after chemotherapy, with the hope of feeling better. Most patients do not experience nausea, but some patients are simply more prone to nausea and vomiting than others. Encourage the cancer patient to eat small amounts of food, drink water, and rest as much as possible. Physicians choose the antiemetics that are most appropriate for the patient based upon the type of chemotherapy treatment that the patient is receiving and the needs of the patient. Relatively speaking, because of a variety of preemptive measures, physicians can help the vast majority of cancer patients avoid or reduce the intensity of their nausea and vomiting while improving one’s level of comfort throughout the course of treatment.
The sick person can benefit from the presence of immediate family members. Regarding this unfortunate reality of CINV (Chemotherapy Induced Nausea and Vomiting), family may offer the following:
- Help them eat small, light meals to avoid an upset stomach.
- Make sure the patient remembers to take their medications on schedule.
- Keep the house calm and quiet to reduce stress.
- Offer fluids like water or juice to prevent dehydration.
- Talk to the doctor if nausea and vomiting from chemotherapy become worse.
With care, love, and proper medicine, patients can feel better and manage their symptoms during treatment.
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