I was prescribed lexapro for major depression. I have been on it for about 3 weeks. I am coping with side effects well, however for the last 10 days or so I am having so hard erections that it hurts. Pain usually occurs on the side of my penis. After a research I found that Peyronie's disease has similar symptoms that may develop into erectile dysfunction. I am not having erections longer than 30 min, but I am concerned it may cause permanent sexual problems in the future. Could lexapro be the cause of it?