You must stay on the isotretinoin for the full course in order for it to work. 20 mg. is a very light dose. The usual dose is 40 mg a day, more if you have severe acne. It has a lot of side effects that are not fun, but if you stay the course, you will have much clearer skin for a very long time. I took a course and a half at 40 mg a day. I now have one or two pimples a month and they last a shorter time than they used to. Be patient and try to stay the course.
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Posted to Salicylic Peel for Mild Acne (Forehead, Nose and Cheeks) - India on 18 Feb 2010