Diclofenac diethylamine | Linseed Oil | Methyl Salicylate and Menthol. Diclofenac diethylamine and Menthol are non-steroidal anti-inflammatory drugs (NSAIDs) which work by blocking the release of certain chemical messengers that cause pain and inflammation (redness and swelling). Linseed Oil is a plant-based oil which further reduces inflammation and improves blood circulation at the site of application.It also increases the penetration of Diclofenac diethylamine through the skin. Methyl Salicylate produces a cooling effect on the skin. A muscle relaxant that relieves muscle stiffness and spasms.