Blood pressure meds can do this. After all, an E is pumped up by blood. My dh is also on blood pressure meds, and this was a potential side effect his doctor talked with him about. I suggest that your dh take this up with his doc next time he's in for a bp check-up. If the bp is under control, then maybe he can reduce the med levels. If not, then he'll have to check with the doc before taking cialis or the like, as it might interact with the bp-regulation. For now, he should assume it's the meds and not himself as such that's causing the problem.