Preliminary clinical experience with meptazinol, a new analgesic

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Abstract
The analgesic effect of intravenous meptazinol at various dosage levels was studied in 30 patients suffering from acute renal colic. Out of a total of 41 injections (dose range: 20 to 120 mg.) a favourable analgesic response was recorded on 39 occasions. The onset of action was rapid with the minimum duration of action of 1 hour. Higher doses increased the drug's action but were accompanied by nausea and dizziness. There was no overall effect on blood pressure or heart rate.

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