Cialis Vs. Tamsulosin For BPH

I'm 72. I do not want to be done with my sex life. I have BPH and have been taking tamsulosin for quite a few years. I do ok as far as the urinating thing is concerned. Pretty slow sometimes, pretty often lots of times... all of that. But sexually, it takes me 2 or 3 weeks to get done doing what I really want to do. I can get an erection, and have lots of feeling, but then the gas tank goes to empty and I'm done.

Recently I read that this is a known side effect to the tamsulosin, not really a problem of the bph. So the question comes can I or should I arm-twist my doc to try cialis 5mg instead? Again, the erection thingy isn't really a problem, it's the finishing up that doesn't get done.

Does cialis seem to work as well for bph as tamsulosin? Better?

Also, I have emphysema. Once again, I'm not going to let a little old thing like that spoil my day. But one thing that can happen with emphysema is you can get this silly little right congestive heart failure thing going because your lungs are doing a crappy job of oxygenating the blood. One of the treatments for that? Cialis, but in a 20 mg dose. Much higher dose than that recommended for bph or ed. So I'm wondering that even at a lower dose I might get some relief for the pulmonary hypertension thingy. Some would help with energy levels for instance.