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Pain and nausea were prospectively assessed in 52 patients following elective craniotomy. When assessed at 6-hourly intervals the mean pain scores in patients during the first 24 h for all types of craniotomy were relatively low. However, for a period of at least 2 h 18% of patients complained of excruciating pain, 37% of patients complained of severe pain, 29% of patients complained of moderate pain, 4% of patients complained of mild pain and only 12% of patients complained of no pain in the 24 h following craniotomy. The mean dose of codeine phosphate used within the study period was 123 mg (SD 81). No statistically significant differences in severity of pain or use of codeine phosphate were found when comparing patients undergoing craniotomy at different sites. For at least 2 h 37% of patients complained of severe nausea or vomiting, 35% of patients complained of moderate nausea and only 29% of patients reported no symptoms of nausea during the 24-h study period. Again, no statistically significant differences were found in the severity of emetic symptoms when comparing patients undergoing craniotomy at different sites. Contrary to standard assumptions, severe or moderate pain in the first 24 h after craniotomy is common and is poorly treated with codeine phosphate alone.

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