Fig. (5) Effect of a single dose of 50 mg of rofecoxib (A, n=12) and of aspirin in doses of 80 mg (B, n=16), 500 mg (C, n=8), and 1000 mg (D, n=8) on plasma levels of 6-keto-PGF1α . Means ± SEM. * = p<0.05.