Articles: nausea.
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Available clinical data on the use of oral ondansetron for the prevention of nausea and vomiting in patients undergoing cancer chemotherapy or surgery are reviewed. Injectable ondansetron hydrochloride is very effective in preventing nausea and vomiting associated with even the most emetogenic antineoplastic drugs. In December 1992, 4- and 8-mg oral tablets (ondansetron hydrochloride dihydrate) became available. ⋯ Oral ondansetron is more effective than placebo in preventing post-operative nausea and vomiting in gynecologic surgery patients; however, there have been no comparative studies, and routine use of antiemetics in most surgical patients may be unnecessary because newer anesthetics are less emetogenic. Although the adverse effects of oral ondansetron are milder than those of standard antiemetics, this may not compensate for the drug's high cost. Oral ondansetron is not superior to traditional antiemetics for the prevention of nausea and vomiting caused by chemotherapy or surgery.
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Ann Acad Med Singap · Mar 1994
ReviewManagement of common opioid side effects during long-term therapy of cancer pain.
For most patients with cancer pain, the primary goal of opioid pharmacotherapy is a satisfactory balance between analgesia and side effects. Consequently, the assessment and treatment of opioid side effects is a fundamental aspect of therapy, which may increase the likelihood of a favourable treatment outcome, potentially allow higher and more efficacious opioid doses, and improve quality of life by reducing other uncomfortable symptoms. This review describes the presentation, assessment and management of adverse neuropsychological and gastrointestinal effects due to opioid drugs. These common side effects pose the major challenge for the clinician who undertakes the long-term opioid therapy of patients with cancer pain.
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Current research on chemotherapy-induced nausea and vomiting in cancer patients is reviewed, and some hypotheses to explain why anticipatory and post-chemotherapy nausea and vomiting appear are suggested. Methodological problems are also discussed. It is suggested that future research should focus on post-chemotherapy nausea and emesis, rather than anticipatory nausea and emesis, in order to achieve a deeper understanding of the psychological factors involved in the development of chemotherapy-induced nausea and vomiting.
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Although the aetiology of postoperative nausea and vomiting is not completely clear, a number of key contributing factors increase the risk for an individual patient. The inhalational agents are variably associated with postoperative nausea and vomiting, and nitrous oxide is particularly emetogenic. Older inhalational anaesthetics, such as cyclopropane, are associated with a high incidence, while the currently used agents, isoflurane, enflurane and halothane, cause less, but still significant postoperative nausea and vomiting. ⋯ Furthermore, a previous history of postoperative nausea and vomiting or motion sickness is a known risk factor. Superimposed on this is the type of surgery--abdominal and gynaecological surgery are particularly emetogenic, and the incidence of postoperative nausea and vomiting following strabismus surgery is high. Increased quality of healthcare, and a growing awareness of the importance of patient satisfaction, are providing new incentives to ensure that postoperative nausea and vomiting is dealt with adequately.
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Postoperative nausea and vomiting is one of the most common complications of inpatient and day case surgical procedures. In a climate where total cost of an illness is becoming increasingly important, postoperative nausea and vomiting is a major contributor to direct and indirect costs for both the hospital and patient. ⋯ Postoperative nausea and vomiting is perceived by patients to account for equal or more debilitation than surgery itself and may cause them to lose wages due to absence from work. Reducing the incidence of nausea and vomiting and its associated problems may therefore provide opportunities to improve patient care, decrease the size of waiting lists and improve utilisation of scarce healthcare resources.