I Had A Radical Prostatectomy Done 9 Months Ago Through

I had a Radical prostatectomy done 9 months ago through Da Vinci equipment. I feel great about the procedure. My PSA is less than 0.06 and I have not had any complications whatsoever. Except for my sex life. I have taken Viagra, cialis and other drugs prescribed by my doctor, but so far it hasn´t work. Is there any thing else that I should try?