Hi,
Viagra will prolong your erection but I’ll suggest you to consult your physician before starting on Viagra and rule out certain important diseases like hypertension, coronary artery disease before starting on
Viagra.
Viagra can cause hypotension (low BP) and can tend to worsen hypertension and coronary artery disease.
I hope that helps. Take care and pls do keep me posted on how you are doing or if you have any additional doubts. Kind regards.