Nausea and Vomiting (Patient) (cont.)
IN THIS ARTICLE
Chemotherapy and radiation therapy are the most common causes of nausea and vomiting in patients being treated for cancer.
Nausea is controlled by a part of the central nervous system that controls involuntary body functions (like the heart beating). Vomiting is a reflex controlled by a vomiting center in the brain. Vomiting can be triggered by smell, taste, anxiety, pain, motion, poor blood flow, irritation, or changes in the body caused by inflammation.
The most common causes of nausea and vomiting are:
Many factors increase the risk for nausea and vomiting.
Nausea and vomiting are more likely if the patient:
Anticipatory Nausea and Vomiting
Anticipatory nausea and vomiting may occur after several treatment sessions.
Anticipatory nausea and vomiting occur in some patients after they have had several courses of treatment. This is caused by triggers, such as odors in the therapy room. For example, a person who begins chemotherapy and smells an alcohol swab at the same time may later have nausea and vomiting at the smell of alcohol alone. The more chemotherapy sessions a patient has, the more likely it is that anticipatory nausea and vomiting will develop. The following may make anticipatory nausea and vomiting more likely:
Treatment of anticipatory nausea and vomiting should begin early.
Treatment of anticipatory nausea and vomiting is more likely to work when symptoms are treated early. Although antinausea drugs do not seem to help, the following types of treatment may decrease symptoms:
Psychologists and other mental health professional with special training in these treatments can often help patients with anticipatory nausea and vomiting.
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