Hi and thank you so much for this query. I am so sorry to hear about your ED though happy that together with medications, you have been able to achieve a normal blood pressure. Bisoprolol is well known to cause ED. To me, instead of trying to take viagra to correct this problem, I will suggest that your doctor considers trying another medication that can help you attain your Blood pressure goals without this side effect. If it proves difficult, then using viagra should be considered. Viagra is generally discouraged when taking nitrates for heart disease. Your list of medication posses no potential conflict taking viagra for now. I hope this helps and guides you. feel free to ask for more answers if need be. I wish you well and hope you get a solution to this Ed so that you can again take full control and advantage of your sexual life. Thanks. Dr. Ditah, MD