Relative potency of propiram and morphine for analgsia in man.
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Biomedical subjects
Publications and source records attributed to W H Forrest.
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Lorazepam (0.5, 1, 2, and 4 mg) was compared with pentobarbital (60 and 180 mg) for its effect on sleep in "hospital insomnia." Subjective-response data were collected by research nurses. Lorazepam was found to be a potent nighttime sedative: 1 to 1.25 mg of lorazepam is equivalent to 100 mg sodium pentobarbital for measures of sleep quality and duration. At this dose level it is less effective than 100 mg of pentobarbital as a sleep inducer. Studies at higher doses (up to 4 mg) indicate that lorazepam has a wide therapeutic index.
To increase the sensitivity of the method for evaluating oral analgesics in postoperative patients, we designed a combined oral/parenteral bioassay. Drugs studied were parenteral morphine, parenteral propiram, and oral codeine at two dose levels each and oral propiram at four dose levels. Results from data on 308 patients suggest that future studies designed to establish the relative potencies of oral analgesics should use parenteral morphine as the standard in a combined oral/parenteral study because this approach provides a very sensitive measure of analgesia. Further, with one drug as the reference compound, results from many sources would be more readily compared.
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