how long does the effects of aspirin last in your system
7 Hpw long would it take for (1) 81mg of aspirin to be completely out of your system...On for about 1 year. Dr. Venkata Chilakapati Dr. Chilakapati. Aspirin: For small dose of Aspirin elimination half life is 2 to 4.5 hours. So within 24 hours it will be completely eliminated from the body.