Not Medical Advice. A round, red pill with 44 and 291 on one side is 200mg of ibuprofen. Ibuprofen is used in the treatment of pain, back pain, headache, osteoarthritis, rheumatoid arthritis, etc. It belongs to the drug class nonsteroidal anti-inflammatory agents. It works by stopping the body's production of a substance that causes pain, fever, and inflammation.
Here is a short video on ibuprofen: