"i have to say after all the other medicines i&#039;ve tried i&#039;m not sure why this was the last resort. this was the only medicine that worked for my cystic acne caused by my pcos. i&#039;ve tried birth control antibiotics topical treatments you name it. nothing beside this has really worked for me i a on 100 mg once a day and this has been my savior. although i found it took a good month to see oil reduction. only con was irregular periods but after 5 months it straightened out."