Diclac Relief 1% Diclofenac Pain Relief Gel (30g). Diclac belongs to a group of medicines called nonsteroidal anti-inflammatory drugs (NSAIDs), which are used to treat pain and inflammation.. Diclac Gel can be used topically to treat pain and inflammation in: - Osteoarthritis of superficial joints such as the knee - Localised forms of soft tissue rheumatism - Trauma of tendons, ligaments, muscle and joints e.g. due to sprains, strains and bruises.
