"so i&#039;ve been taking 100mg for a week now. my skin has been noticeably less oily and i&#039;ve had no new breakouts. however, yesterday i noticed a tingling feeling in my back that last for a few hours then subsided. i toook it today and in about 30mins i started experiencing that tingling feeling in my back again. think i&#039;m going to stop. i&#039;d rather deal with the oil and acne than experience this tingling feeling."