Olfen hydrogel is a medicinal product with analgesic, anti-inflammatory and anti-swelling properties for use in injuries of various origins, such as sprains, strains and bruises, as well as in inflammation of joints and soft tissues. Olfen can be used in adolescents over 14 years of age and adults. Olfen hydrogel additionally has a cooling effect. The active substance is: diclofenac sodium (Diclofenacum natricum).