Parameters of platelet thromboxane biosynthesis were measured 24 h after ingestion of equivalent salicylate doses (500 mg) of aspirin (ASA) and choline magnesium trisalicylate (CMT), a non-acetylated salicylate. In random order, 10 healthy volunteers received these drugs on 2 separate days, 2 weeks apart. While ASA significantly prolonged bleeding time, and decreased plasma thromboxane generation and serum thromboxane B2 levels, CMT failed to produce such effects. Thus CMT, which lacks an acetyl moiety in its structure, has no inhibitory effect on platelet thromboxane biosynthesis, and may therefore be considered safer than ASA for therapeutic use, when inhibition of platelet function can be hazardous.

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