This medicine contains the active substance diclofenac which belongs to a group of medicines called non-steroidal anti-inflammatory drugs (NSAIDs). It is specially formulated for rubbing into the skin. Voltarol Joint & Back Pain Relief 2. 32% Gel is used to relieve pain and reduce inflammation and swelling in a number of painful conditions affecting the joints and muscles. This medicine can be used to treat: muscle and joint injuries (e. g. sprains, strains, bruises, backache, sports injuries), relieving pain and helping recovery back to normal function tendonitis (e. g. tennis elbow), swelling around elbow or knee. Voltarol Joint & Back Pain Relief 2. 32% Gel is intended for use in adults and children aged 14 years and older. What Voltarol Joint & Back Pain Relief 2. 32% Gel looks like and contents of the pack This medicine is a white to practically white, cooling, non-greasy, non-staining cream-like gel. The product comes in packs of 30 g and 50 g. Not all pack sizes may be marketed.