Voltarol 12 Hour Joint Pain Relief Gel can be applied twice daily (morning and evening) to last all-day. The gel creates a reservoir of diclofenac when applied regularly*, which gives the skin a source of the active ingredient throughout the day for lasting relief of pain and inflammation. Unlike tablets that go through the stomach, Voltarol 12 Hour Joint Pain Relief Gel concentrates relief deep in the joint tissue to fight pain and inflammation all day long. The Emulgel technology used in this product helps the gel to penetrate deeply into the skin to enhance delivery of the active ingredient, diclofenac, to the site of pain and swelling. In addition, the Emulgel technology is a unique combination of a gel and cream providing both a cooling and soothing effect when applied to the skin. The massaging effect of applying the Emulgel can provide additional soothing benefits at the site of pain and inflammation.