Diclofenac sodium in the clinic is mainly used for the treatment of joint pain, can be used for tenosynovitis, pain after surgery, dysmenorrhea, toothache, headache and so on. Diclofenac sodium is a kind of anti-inflammatory and analgesic drugs in the clinic, mainly through the inhibition of cyclooxygenase activity, inhibit leukotriene synthesis, so as to play an anti-inflammatory and analgesic effect, in the clinic can be used for rheumatoid arthritis, osteoarthritis, gout treatment. The use of diclofenac sodium attention, allergy to it, liver failure, renal failure, active ulcers, severe heart failure patients are prohibited. For children under 12 months and patients in the last trimester of pregnancy is prohibited. The main clinical side effects of diclofenac sodium in the clinic are adverse reactions in the digestive system, nausea, vomiting, stomach pain, diarrhea, etc., may also be manifested as an increase in blood pressure, sweating, headache, dizziness and other symptoms. It is important to avoid combining diclofenac with other NSAIDs and to use the lowest effective dose for the shortest duration of treatment while controlling symptoms. Diclofenac sodium should be used under medical supervision.