Systopic Laboratories Pvt. Ltd. Manufactures Anti-inflammatory Methyl Salicylate Composition for Back Pain. Systopic Laboratories Pvt. Ltd. Manufactures innovative products aimed to deliver better therapeutic solutions. Anti-inflammatory Methyl Salicylate Composition for Back Pain includes diclofenac diethyl amine 1.16%w/w, mephenesin 5% w/w, turpentine oil 3% w/w and menthol 2%. Anti-inflammatory Methyl Salicylate Composition for Back Pain is available a tube of 25 gm. It is also used for stiff neck, frozen shoulder, joint pains, sprains & muscle pulls. This gel contains diclofenac diethyl amine inhibits the prostaglandin biosynthesis. The mephenesin relieves the adjoining area muscle spasm providing additional relief.