The usefulness of oral morphine to alleviate pain has been tested in 70 patients with cancer. The efficacy was found to be 87% (61/70). The starting dose was 10 mg/d-12 mg/d (mean 36 mg/d), and the maximum dose was 10 mg/d-3,600 mg/d. Twenty four of these patients were able to stay at home or go to the hospital for dose treatment. In 27 patients, oral morphine dose were able to administrated until death. Although vomiting and constipation were frequent side effects, the administration of adjuvant drugs relieved these symptoms. It was found that these oral morphine doses did not shorten a patient's life span. Thus we have concluded that oral morphine proved a useful, safe, and convenient drug for the control of cancer pain.
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