I take Metformin 500mg 2 x day and Diovan 160/251 x day. My Dr. has given me trial pills of Cialis in different strengths. It works well. My flaccid penis is much bigger when I take Cialis, my prostate feels great, and urinating is great, too. However, after I take Cialis for a time, my legs start to hurt quite a bit, and my heart feels strange. Is it safe to keep taking it? I actually like Levitra better, but that causes rectal bleeding for me. Is rectal bleeding from Levitra normal?