Best acne treatment for pustules and cysts?

After researching the different types of acne on the internet I have come to the conclusion that I have pustular acne with occasional cysts. I have acne for seven years now, and now that it has outlasted adolescents and the teen years, I think its time for it to go! I am pretty sure it has something to do with my hormones since I have Polycystic Ovarian Syndrome. I have tried every drug store brand and higher end brands of acne wash, cream, toner or spot gel and have tried systems like Acne Free and ProActive. None of these have helped in the slightest. My skin, although I have moderate-moderately severe acne and does typically oily, gets dried out VERY easily and salycylic acid and benzoyl peroxide especially irritate it. I have found sulfur and zinc to be much milder, but they have done little to help my acne. At this point I have given up hope on a topical treatment and am looking for suggestions for prescription antibiotics or medications. Accutane is my last resort, and am unable to take birth control pills due to a medical reason. My doctor is being not very helpful with this, so I have decided I will do the research then specifically ask her for that medication. Thanks you so much for your help!

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