Fenbid, also known as ibuprofen extended-release capsules, is a non-steroidal anti-inflammatory pain medication that has an onset of action of between 20-30 minutes, while the specific duration of effectiveness of the drug can reach 4-6 hours. If the pain is severe, a capsule of Fenbuterol can be taken after 4-6 hours for pain relief. Fenbid capsules are generally used for anti-inflammatory and analgesic purposes in rheumatoid arthritis, rheumatoid arthritis, gouty arthritis and osteoarthritis, as well as for post-operative wound pain relief. However, the drug has certain gastrointestinal reactions, which may lead to gastrointestinal symptoms such as nausea and vomiting, so patients are advised to take it after meals, and if this happens, patients are advised to stop the drug in time to avoid serious complications.