1,6-DIMETHYL-4-OXO-1,6,7,8,9,9A-HEXAHYDRO-4H-PYRIDO [1,2-A]PYRIMIDINE-3-CARBOXAMIDE (CHINOIN-127), A POTENT NON-NARCOTIC ANALGESIC AND ANTI-INFLAMMATORY AGENT

  • 1 January 1979
    • journal article
    • research article
    • Vol. 29-1  (5) , 766-773
Abstract
1,6-Dimethyl-4-oxo-1,6,7,8,9,9a-hexahydro-4H-pyrido[1,2-a]pyrimidine-3-carbamide (Chinoin 127), a non-narcotic analgesic with potent antiinflammatory activity is described. Chinoin-127 is more potent as an analgesic in the hot plate, Randall-Selitto and writhing tests than is acetylsalicylic acid (ASA) and an effective antiphlogistic agent in a battery of tests (carrageenin, kaolin and dextran induced rat paw edema, Northover test, carrageenin induced abscess, implanted cotton pellet method, adjuvant arthritis) used for measuring antiinflammatory activity. The PG-synthesis inhibitors (indometacin, suprofen) were found to be devoid of analgesic activity, and great test-dependent variations in their antiinflammatory effect were observed. They proved to be inactive in the Northover test. Unusual grade of inhibition in the carrageenin-induced rat paw edema test was obtainable by the simultaneous administration of Chinoin 127 and indometacin.