Voltaren Gel: From WebMd
This medication is used to relieve joint pain from arthritis. Diclofenac belongs to a class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs).
http://www.webmd.com/drugs/2/drug-150270/voltaren-topical/details
...as a bonafide Olde Pharte I have had doctors write prescriptions for this several times. Knees, hips, back, neck whatever. I dunno how much the total cost for it was when ya had to have a prescription for it but the co-pay was $80.00. I am told it is good medicine. It was so expensive I got one prescription filled and then decided the pain in the wallet was more severe than the pain in the all over I was experiencing.
...time passed. Ya no longer have to have a prescription to get it. The same size tube with the same ingredients is now $20.00
...big pharm may not be conspiring against us, but they are certainly gouging us when we ain't looking.

Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!