Voltarol Thermal Patch Voltarol Thermal Patch effectively & naturally provides pain relief & deep muscle relaxation for muscle pain, back, neck & shoulder pain. The Voltarol Thermal Patch is applied directly to the skin, on the site of your muscular pain. You feel the heat & relief instantly. The patch provides 10 hours of penetrating heat that works to unwind tight, aching muscles & increases circulation to help soothe pain away. Thin, discrete & designed to work on your body where it hurts, the patch helps you to get active again soon & takes your mind away from pain. Ingredients The ingredients are Iron Powder, Activated Charcoal, Water, Acrylic Polymer & Sodium Salts Directions Make sure your skin is clean dry & non-greasy. Remove the patch from the packaging & apply directly onto the affected area. Leave on for up to 10 hours. If needed, apply a patch to the same area 24 hours later. The patch can be used with other medicines except those that are applied directly to the skin & on injection sites.