I don't know about therapain - but Traumeel works great (a homeopathic cream). I get it at the health food store.
The other thing I use for pain is a Qi Gong Machine - it puts out random low-frequency sound waves. I don't see the one I bought on the internet now, but there are lots of them out there.
Even my husband is impressed with how it reduces pain, and he's not into any of the new age stuff. He was pretty surprised that it actually works. I've used it for 10 years or so.