Fenbid, also known as ibuprofen extended-release capsules, is an over-the-counter drug in the antipyretic and analgesic category. Fenbendazole inhibits the synthesis of prostaglandins and has analgesic, antipyretic and anti-inflammatory effects, and is an extended-release dosage form that allows the drug to be released gradually in the body, with each dose lasting 12 hours for pain relief. The indications for ibuprofen are mainly for the relief of mild to moderate pain, such as headache, arthralgia, migraine, toothache, muscle pain, neuralgia, dysmenorrhea, and also for fever caused by the common cold or influenza. The specific dosage is 1 capsule once, 2 times a day for adults. Adverse reactions may include nausea, vomiting, heartburn or mild indigestion, gastrointestinal ulcers and bleeding, elevated transaminases, headache and dizziness, tinnitus, blurred vision, nervousness, drowsiness, lower limb edema, or sudden weight gain in a few patients. Rare adverse reactions include skin rash, allergic nephritis, cystitis, nephrotic syndrome, renal papillary necrosis or renal failure, and bronchospasm.