I've been on TRT for 3 years...been using Viagra, Levitra and most recently Cialis with good results for about 10. Wife had some surgery which kind of took her out of commission for about 2 months. I didn't take any ED pills for that time. When she finally gets cleared in hot, I don't feel like the Cialis is working well at all. Just barely even. Now it's in my head...the fear of failure thing. Is it possible for Cialis to just stop working? It's the same lot I was using prior to her surgery. These pills are only about 6 months old so I don't think they would have lost some potency. No other health changes. In fact I stopped drinking alcohol so I would have thought things would have gotten slightly better. I know, I need to talk to my doctor. I just thought I would ask the group if it's possible for a body to stop responding to Cialis after being on it about 2 years. Appreciate any info.