Diclofenac, Linseed Oil, Methyl Salicylate, and Mentho gel for Fast Relief From Pain Sprain and Strain is a pain-reliever gel formulated with linseed oil, diclofenac diethylamine, methyl salicylate, and menthol, which can help provide relief from pain, swelling, and inflammation caused due to low back pain, shoulder pain, neck stiffness, joint pain, and sports injury.