t know if taking Viagra is likely to be a problem or not (I do know that
Viagra was originally developed to be a
heart drug, they only discovered in testing that it also had the effect of causing erections!)
You should go and see a doctor about this. I guess you must already be seeing a doctor about your blood pressure, so go and speak to them and tell them you are having this problem. Only a doctor can tell you for sure if it is related, and advise what the best thing to do would be.