I have been taking 10 mg of Aygestin for about 18 months now for endometriosis. I have had incredible results with it and my symptoms are gone. I have tried to go off of the Aygestin a few times but the symptoms reappear almost immediately. I am concerned about the length of time I have been taking the medication. My gyno has told me not to worry about it but I am still concerned. Does anyone have any info on how long you can safely remain on Aygestin?