Nausea and Vomiting (PDQ®): Supportive care - Health Professional Information [NCI] - General Risk Factors and Etiologies
Not all cancer patients will experience nausea, vomiting (emesis), or both. The most common causes are emetogenic chemotherapydrugs and radiation therapy to the gastrointestinal (GI) tract, liver, or brain. Several patient characteristics have also been identified. These include incidence and severity of nausea and vomiting (N&V) during past courses of chemotherapy, history of chronic alcohol use, age, and gender. Patients with poor control of N&V during prior chemotherapy cycles are likely to experience N&V in subsequent cycles. N&V is less likely in patients with a history of chronic high intake of alcohol  and more likely in women [2,3] and in patients younger than 50 years.
Other possible causes include fluid and electrolyte imbalances such as hypercalcemia, volume depletion, or water intoxication; tumor invasion or growth in the GI tract, liver, or central nervous system, especially the posterior fossa; constipation; certain drugs such as opioids; infection or septicemia; or uremia. The psychological variables of state anxiety (level of anxiety during chemotherapy infusions) and pretreatment expectations for N&V (self-fulfilling prophecy) have also been investigated as predictors of posttreatment nausea.[4,5,6,7,8,9] At present, studies have found mixed results that vary due to different research methods. Better designed studies, however, have found state anxiety and patient expectations for nausea to be predictors of posttreatment nausea, even after controlling for known physiological predictors (susceptibility to nausea during pregnancy and motion sickness) and emetogenic potential of the chemotherapy drugs.[6,7,8,10,11] It is important to note, however, that patients' fears and expectations about chemotherapy can be variable and change over time. In a longitudinal study, patients' anticipatory fears of vomiting decreased significantly from pretreatment to a period 3 to 6 months later, particularly when their chemotherapy included antiemetic medications.
Purpose of This Summary
This PDQ cancer information summary for health professionals provides comprehensive, peer-reviewed, evidence-based information about endometrial cancer screening. It is intended as a resource to inform and assist clinicians who care for cancer patients. It does not provide formal guidelines or recommendations for making health care decisions.
Reviewers and Updates
This summary is reviewed regularly and updated as necessary by the PDQ Screening and Prevention...
Clinicians treating N&V must be alert to all potential causes and factors, especially in cancer patients who may be receiving combinations of several treatments and medications. (Refer to the PDQ summary on Pain for more information on opioid-induced N&V.)
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