Diclofenac sodium extended-release tablets and capsules have the same main components, indications, contraindications and adverse reactions are basically the same, only the dosage form is different. Diclofenac sodium extended-release tablets and diclofenac sodium extended-release capsules are common non-steroidal drugs with strong antipyretic, analgesic and anti-inflammatory effects, the composition of the drug is diclofenac sodium, the main difference lies in the different dosage forms, the former is a tablet, the latter is a capsule, but the indications, contraindications and adverse reactions are basically the same. Both are suitable for the relief of all kinds of chronic arthritis during the acute attack or persistent joint swelling and pain symptoms, all kinds of soft-tissue rheumatic pain and post-exercise injurious pain symptoms, as well as toothache, headache, menstrual cramps and other acute mild and moderate pain; also used for antipyretic. Contraindications to the use of both are hypersensitivity to the product, taking non-steroidal anti-inflammatory drugs to cause anaphylactic reactions or gastrointestinal bleeding perforation, a history of active peptic ulcer/bleeding or the occurrence of the presenting symptoms, severe heart failure, used for coronary artery bypass grafting surgery perioperative pain treatment. The most common adverse reactions include gastrointestinal discomfort, which may include gastric discomfort, nausea, poor appetite, burning sensation, acid reflux, etc., and may disappear with discontinuation of the drug or symptomatic treatment. Specific medication should be under the guidance of a physician, not unauthorized use of medication.