Is it safe to use DMSO on humans for pain relief?

These are some things I found
Its an antioxident, anti inflammatory, pain reliever and more
It is recommended that you take some time off on a regular basis, say two days in a row each week. For example, just take Saturday and Sunday off every week. If you are using it daily, long term, take two to four weeks off, in a row, every six months. Or, you could do 30 days on and 30 days off.
Side effects
Skin rash, chest tightness or breathing problems, bad taste in mouth, women who are pregnant or expect to become pregnant should discuss the appropriateness of DMSO use during pregnancy and breastfeeding.

Not without a prescription and the advice of your physician, there are some pretty serious side effects and drug interactions associated with DMSO.