B.C.
My dermatologist prescribed Tri-Luma Cream which contains 4 % hydroquinone, tretinoin .05% and fluocinolone acetonide .01 %. About 23 % of the population doesn't respond to it and I am part of that population! A girlfriend used it and her skin looks wonderful; she has absolutely no dark blotches. Because it's prescription grade, it might be a better route -- better quality, more reliable source -- if you're gonna gamble with an ingredient that makes you nervous. Although insurance won't pay for it, presumably your doctor will be on top of any side effects!