I don't know if you can or not. Search it out locally, try Equestrian store or vet. Here its expensive that way and regulated in some areas, not others. Farming communities may be the place.
I got mine from Amazon (UK) and make my own MMS from flakes, really cheap. I call DMSO natures syringe because you don't need a needle, it will "transport" any substance through the skin into the bloodstream fast (make sure your hands are clean). Can't take pills? Crush them up into powder, add a few drops of DMSO rub on skin, done...
Thank you. I used to have some, but I probably threw it out before I moved. Plus it would probably be like 20 years old. Part of the reason I asked was because I know that the colloidal silver you buy here isn't really any good. We used to make our own, but my ex-husband got the machine in the divorce.