Ibuprofen 400mg tablets are a nonsteroidal anti-inflammatory drug (NSAID) that works by inhibiting the production of prostaglandins, chemicals in the body that cause inflammation, pain, and fever. It is commonly used to treat conditions such as arthritis, muscle pain, back pain, headaches, and menstrual cramps. Ibuprofen is also effective at reducing fever and is often used for pain management following surgery or injury. Unlike paracetamol, ibuprofen has the added benefit of reducing inflammation, making it more suitable for conditions involving swelling and inflammation, such as arthritis. While generally well-tolerated, ibuprofen should be taken with caution in individuals with a history of stomach ulcers, kidney disease, or heart problems, as it can cause gastrointestinal issues, including stomach bleeding, or kidney damage with prolonged use. Ibuprofen should also be taken with food to minimize stomach irritation.