Quinapril
high blood pressure
"People mention a cough as a potential side effect-I've hardly noticed this at all, but what I HAVE noticed, is that this medicine interferes with getting a good erection.
Skipping a dose (or delaying it until after sex) does help(assuming your doctor says that it is okay to skip or delay a dose. Of course on the other hand, I was on a different high blood pressure medicine years ago, and it was WAY worse in this regard.
And, YES, erectile dysfunction medicines will help overcome the effect. I've been using Quinapril for many years-started with 20 MG once a day, and eventually went to 40 MG once a day. 
It has worked reasonably well...note that users of the medicine in this class (ACE Inhibitors) sometimes end up with cold hands and feet.
This is generally an issue in cold climates."