Analgesic activity of dipipanone hydrochloride in student volunteers.

Dipipanone hydrochloride raised the threshold to ischaemic pain in healthy human volunteers. The lowest dose producing a significant rise in pain threshold was 10.0 mg. The peak effect for all doses was reached after about 2 hr. Side effects, the most common of which were drowsiness, nausea, and vertigo, are described and analysed. The drug was shown to be a histamine liberator and to cause pain and tenderness at injection sites.