I've used dmso for everything. I'm a retired chemistry teacher - taught high school and college. DMSO didn't do anything to your hearing dont know about the d-minonene. Daily I find more and more physicians recommending the use of DMSO. I only use 99.9% pharmaceutical grade. Its plant based. Much of the DMSO is manufactured in China and is petroleum based. I have no knee problems, no back problems, no injuries that haven't been treated with DMSO. I take DMSO daily 1 tsp in my orange juice. I have no ailments and my skin is wrinkle-free and clear. At the age of 73, I have no health problems. I used it for sinus problems in the ears letting it go into my inner ear and hoping it would cler my eustachian tubes. My sister is an anesthetist and she uses it to remove scar tissue on her ear drum. My appendix scar is about half the size it was before DMSO. Found another MD today, Dr. Williams, who says DMSO is the closest thing to a wonder drug we have and it's a shame FDA won't approve it for other uses. I did graduate research at FDA and they are politically run in favor of the pharmaceutical companies and lobbies for goods like sugar. They go with them so they aren't to do much about DMSO which would profit no one.