Fastum Gel 50gFastum gel 50g contains Ketoprofen 2. 5% w w which is used in rheumatic pain and musculoskeletal pain. Fastum Gel is a non steroidal anti inflammatory drug (NSAID). It works by blocking the release of certain chemical messengers that cause fever, pain and inflammation (redness and swelling). How to use Fastum Gel is for external use only: Gently massage the gel on the area you need to treat Wash your hands immediately after use Do not apply Fastum Gel