Treating oily skin with Isotretinoin (Accutane)

I have extremely oily skin.  I have tried Retina A, and a sulfur wash.  Neither one helped with the oil, they only made my pores appear smaller.  My dermatologist suggested I take Isotretinoin (accutane).  She said it will shrink my oil glands in my skin.  I looked online and haven't seen any result to use this for treatment of oily skin.  I am aware of the side affects and pregnancy risks.  If this will help me with my oily skin then I am willing to take it.  Any advise?  Thank you