Summary
Six parameters related to the release reaction were measured simultaneously in 10
human volunteers prior to the intake of one single dose of 1 g acetylsalicylic acid
and 1, 4, 5, 6 and 7 days later: ΔE5 with diluted collagen, ΔE10 with Thrombofax® and the serotonin-14C release by undiluted and diluted collagen, by Thrombofax and by bovine plasma. The
duration of the inhibitory effect varied according to the test used. It was the most
prolonged (through the 7th day) if serotonin-14C release by diluted collagen was measured.
A systematic investigation of the platelet release reaction in women taking a combined
oral contraceptive was also performed. There were no statistically significant differences
from a control group. No difference in acetylsalicylic acid sensitivity, measured
24 hours after intake of 1 g of aspirin, could be demonstrated.