Ibuprofen extended-release capsules can usually be taken for 3-5 days. Ibuprofen extended-release capsules are a non-steroidal anti-inflammatory drug with anti-inflammatory, analgesic and antipyretic effects. Clinical use of ibuprofen extended-release capsules is mainly used to treat muscle pain, joint pain, toothache, headache, dysmenorrhea, etc. It can also be used to relieve fever or reduce fever treatment. The main adverse effects of ibuprofen extended-release capsules are irritation of the gastrointestinal tract and increased risk of bleeding. Long-term high doses of ibuprofen extended-release capsules may cause gastrointestinal ulcers, bleeding, and in severe cases, life-threatening perforation of the gastrointestinal tract. Therefore, if you take ibuprofen capsules for 5 consecutive days without significant improvement in pain symptoms or 3 consecutive days without relief of fever symptoms, you should not continue to take them and should consult a professional doctor at a local regular medical institution.