I have a 15 year old daughter who has had JIA for the past 14 years. She takes methotrexate 17.5mg by injection once a week. Her periods have been very frequent recently, stopping and starting all over the place which is starting to get her down. Can methotrexate effect your menstrual cycle or is it more likely to be the fact that her body hasn't developed a regular cycle yet?
Any advice would be greatly appreciated.