KefenTech Anti Inflammatory & Analgesic Plaster is a topical pain relief plaster containing ketoprofen, a non steroidal anti inflammatory drug. It is used for local relief of pain and swelling associated with conditions such as arthritis, backache, joint pain, muscle pain, tennis elbow, tendinitis, sprains, strains, bruises, and sports related injuries when recommended by a doctor or pharmacist. Ketoprofen works by reducing substances in the body called prostaglandins, which are involved in pain and inflammation. The plaster delivers the medicine through the skin to the affected area for local action. It should be applied only to clean, dry, intact skin and should not be used on wounds, infected skin, eyes, mucous membranes, or irritated areas. Possible side effects may include redness, itching, rash, burning sensation, irritation, dryness, or sensitivity at the application site. These are not all the possible side effects. Talk to your healthcare provider if symptoms persist, worsen, or if any side effect bothers you.