Ibuprofen extended-release capsules are not hormonal drugs, but belong to non-steroidal anti-inflammatory drugs, which play an analgesic and anti-inflammatory role by inhibiting the synthesis of prostaglandins by cyclooxygenase, and play an antipyretic role through the hypothalamus thermoregulatory center. The extended-release dosage form allows the drug to be released gradually in the body, producing a sustained pain-relieving effect. It is often used to relieve mild to moderate pain, such as headache, joint pain, dysmenorrhea, etc. It can also be used for fever caused by the common cold or influenza. It is best taken during or after a meal to reduce gastrointestinal irritation. It should be swallowed whole and should not be opened, dissolved or chewed to avoid damaging the dosage form and losing its slow-release effect. Long-term users may experience gastrointestinal adverse reactions, such as nausea and vomiting, which generally do not need to be discontinued and can be tolerated with continued use; less than 1% of patients will progress to gastric ulcers and gastrointestinal bleeding. Rare adverse reactions also include renal insufficiency, abnormal liver function and leukopenia, therefore blood picture and liver and kidney function should be monitored regularly during long-term use of the drug.