How many times a day to take aspirin How many tablets to take is determined by the purpose of treatment. Aspirin can be used to relieve fever, analgesia and anti-platelet aggregation. For analgesia and antipyretic, take 0.3~0.6g each time, 3 times a day, or once every 4 hours if needed. For rheumatic diseases 1 time 0.6~1g, 1 day 3~4g; for the inhibition of platelet aggregation, it is recommended to take 75~150mg once a day. For people with gastrointestinal bleeding, hemophilia or thrombocytopenia and a history of allergy to aspirin or other non-steroidal anti-inflammatory drugs, it is forbidden to use the drug. In the use of the process should also pay attention to the presence of bleeding, regular rechecking of routine blood and coagulation, the use of drugs must be under the guidance of a professional doctor.