hi and welcome.
well with your stents in place , and you are pain free, you dont require nitrates . the only drug that has profound side effect with viagra
. nitrates that relieves in chest pain actually drops you r blood pressure. viagra is also known to drop the blood pressure. thus using these two together have great threat of signifacant hypoyension and even deaths are reported during sexual intercourse.
using viagra with nitrates is thus contra indicated.. please consult youor cardiologist when ever you will be using nitrates with it eg the pill that you keep under your tongue during acute chest pain
. with your current medications nitrates are not seen but if your BP is very much controlled with other drugs even then see your primary physician . regards