Aspirin is available in 100mg size and is usually taken 1 to 3 tablets at a time. Clinically aspirin belongs to the salicylic acid class of drugs. Due to its strong antipyretic and analgesic effects, it is mainly used in the treatment of headache, toothache, muscle pain, dysmenorrhea and other diseases, and also can relieve the redness, swelling, heat, pain and other uncomfortable symptoms caused by rheumatoid arthritis. If it is used for the treatment of antipyretic and analgesic, the specification of 100mg aspirin, you can take 1~3 tablets at a time, that is, 0.3~0.6 grams. If used for rheumatoid treatment, take 3 tablets, or 0.6 grams at a time, and gradually reduce the dosage after the symptoms have subsided. Aspirin has the function of affecting platelets, usually low concentration of aspirin, can reduce the generation of thromboxane a2 in platelets, so as to have anti-platelet aggregation and anti-thrombosis, to achieve the effect of anticoagulation. For the treatment of ischemic heart disease, atrial fibrillation and other diseases, the size of 100 mg of aspirin, each time to take 1 tablet. Usually for aspirin allergy, severe heart failure patients are prohibited to take, and for pregnant and lactating women need to be used with caution. Avoid combining it with other non-steroidal anti-inflammatory drugs. Secondly, if nausea, vomiting, abdominal pain and other symptoms occur, you need to stop the drug and consult a doctor. The specific dosage of aspirin should follow the doctor’s instructions, do not unauthorized use of medication, in order to avoid serious consequences.