The d2 polymers, or D-dimers, are elevated uncertain how long to take aspirin to normalize. D-dimer is a degradation product of fibrin that is formed through processes such as activated hydrolysis. When elevated, it indicates the presence of hypercoagulability or secondary hyperproteolysis, which can be seen in hypercoagulability, renal disease, disseminated intravascular coagulation, organ transplant rejection and other diseases. Aspirin is effective in hypercoagulable states caused by platelet aggregation, but is not as effective in conditions such as rejection in renal disease, so it is uncertain how long it takes for D-dimer to fall to normal on aspirin, depending on the nature of the disease and the individual’s sensitivity to the drug. Aspirin in the use of aspirin may cause stomach pain, indigestion and other adverse reactions, for acute gastric ulcers, acute heart, liver and kidney dysfunction is not to use aspirin. It is also contraindicated for people with bleeding disorders. Therefore, if the phenomenon of elevated D-dimer, you need to further check the renal function, renal ultrasound, blood routine and other items to find the cause, under the guidance of the doctor to take medication, do not recommend self-medication.