At present, there are many commonly used non-steroidal anti-inflammatory drugs, which can be roughly divided into the following categories: 1, salicylic acid: the most commonly used is acetylsalicylic acid, that is, aspirin. Its efficacy is relatively certain, but the side effects are also very obvious. Aspirin preparations are now mostly enteric tablets, used for antipyretic and analgesic, generally 0.3 to 0.5 grams each time, 3 times a day, taken orally after meals. When used for anti-rheumatism, 1.0-1.5 grams 3-4 times a day. Pay close attention to its side effects. 2. Propionic acid: Common varieties in the market are: ibuprofen, fenbid, naproxen, etc. Fenbid is an extended-release agent of ibuprofen, which has fewer adverse reactions and is easy for patients to receive. Naproxen has a long half-life of 14 to 16 hours, and can be taken once or twice a day. Usage: ibuprofen 0.4 to 0.6 grams per time, 3 times a day; fenbid 0.3 to 0.6 grams per time, 2 times a day; naproxen 0.5 to 0.75 grams per time, 1 to 2 times a day. 3, indole class: there are indomethacin (anti-inflammatory pain), chinolitic (sulindac), etc.. Such drugs have outstanding anti-inflammatory effect, antipyretic and analgesic effect similar to aspirin. Among this class of drugs, the strongest anti-inflammatory effect of anti-inflammatory pain, chinolig is the least nephrotoxic. Dosage: anti-inflammatory pain 3 times a day orally, 50 mg each time; Chironolactone 2 times a day, 0.2 to 0.4 grams each time, the elderly and renal dysfunction should be preferred. 4.Anti-acid: mefenamic acid, chloromefenamic acid, diclofenac and fluoromefenamic acid, etc.. Clinically, fluoromethacrylic acid is mostly used, 3 times a day, 0.2 grams each time. 5.Acetic acid: Diclofenac sodium, i.e. fotarine, is the most commonly used. Usage: 50 mg 3 times a day. It is available not only in oral formulations, but also in emulsions that can be applied topically as well as in extended-release form, which can alleviate gastrointestinal side effects. It is certainly effective. 6, Xikang class: there are inflammatory pain Xikang, etc., because of its side effects, has been rarely used recently. 7, pyrazolone class: there are pau taisong, hydroxy pau taisong, etc.. This drug has been rarely used because of its toxicity.