Dynapar Qps Plus Spray contains Diclofenac Topical, Menthol Topical and Methyl Salicylate Topical as active ingredients. Dynapar Qps Plus Spray is used for Musculoskeletal aches and pains, Osteoarthritis pain, Back pain, Ache, Delayed onset muscle soreness, Anti-pain topical medication, Lower back pain, Arthritis, Pain, Joint pain and other conditions. Dynapar Qps Plus Spray may also be used for purposes not listed in this medication guide. Dynapar Qps Plus Spray works by decreasing the prostaglandin synthesis; providing relief of musculoskeletal aches and pains; reducing pain and delayed onset muscle soreness.