tinea versicol
"I was diagnosed with Tinea Versicolor.  This is basically an overgrowth of yeast on your skin, it causes the affected areas to lose pigment; such as a tan. Locals in Hawaii call it Haole rot. I'm not entirely sure if this medicine is working yet because it can take a long time for your skin tone to even out. My pharmacist did not tell me that Xanax should not be taken with this medicine. I'm really happy that I didn't take any. I can't find out how long it stays active in your system though.  I took the medicine yesterday (400mg) and I am going to take another 400mg dose in one week. Today my face burns as though I have a chemical burn. It's kind of an odd side effect."