Unlike tablets which travel through the stomach, Voltarol Joint Pain Relief 2.32% Gel penetrates deeply into the skin towards the joint, which can help provide targeted all-day relief from pain and inflammation in joints and muscles caused by overuse during physical activity such as walking, exercise or gardening. This 30g Joint Pain Relief Gel works for up to 12 hours and contains a Non-Steroidal Anti-Inflammatory Drug - diclofenac diethylammonium - which is retained in the joint tissue, to provide targeted all-day relief at the source of pain. Always read packaging before use. Keep out of reach of children.