Hello Friend
There are no Pharmaceutical grade products of dmso, because as far as I know it hasn't been approved yet for use on humans in the States. So don't wait for it to happen, it won't. You can purchase the liquid form for livestock at any "Tractor Supply". That's what I did before I moved to Europe. I used to diluted it with distilled water, 50%/50%. Then I would put it in a GLASS spray bottle. I used it once a week and very sparingly. Dmso and Serrapeptase is a good combo. Don't use it with hydrogen peroxide. or ozone gel together, wait a day.