My 3 1/2 year old son has autism and our DAN physician has recommended starting DMPS cream. I am also wondering about the safety and other peoples experiences with it. My DAN physician says he prescribes it over DMSA because it doesn't has the negative effects on the gut that DMSA does. I'm concerned because of the things I've read on the DMPS backfire website. However, I want to use it if it seems to be safe and effective. Does anyone have any positive or negative experiences with DMPS? I would appreciate any feedback. Thank you.