Ladies, have any of you tried anastrozole or letrozole to treat endometriosis? My symptoms returned 4 years after surgery. My gyn put me on Arimidex + OCP (oral contraceptive). I am premenopausal. The combination is supposed to suppress ovary, but I am still feeling stimulated. Esp since I have been through IVF and know exactly what a hyperstimulated ovary feels like. I barely started the cycle for this treatment, but I am already dealing with so many side effects. If you have been through the sane treatment before, can you share your experience? How long were you on AI? Did symptoms return after you stop the treatment? If so, how soon?