gel for the relief of muscle, joint and back pain. Diclofenac diethylamine gel 1.16% http://www.mybodypain.ca/index.html http://www.voltarengel.com/consumer/default.aspx http://en.wikipedia.org/wiki/Diclofenac http://bodyandhealth.canada.com/drug_info_details.asp?brand_name_id=240 http://bodyandhealth.canada.com WIKIPEDIA  - "Diclofenac (marketed under many brand names, see below: Trade names ) is a non-steroidal anti-inflammatory drug (NSAID) taken to reduce inflammation and as an analgesic reducing pain in certain conditions.