This is Dr. David
you need to check your testosterone levels. if your testosterone is low, this can affect erections.
what dose of viagra are you using? you might need the 100mg dose.
you might need a penile vacuum pump and a soft silicone or rubber elastic ring at the base of the penis to help hold in blood and keep your erection longer.
have you tried this before?
let me know if you have other questions.
if done for now, please leave positive rating above the chat box so I can get credit for helping you today
we only get credit for helping clients after positive feedback
you can always reach me with "a question for Dr. David" in the medicine or oncology categories if you have any other questions
here is my website if you need to reach me again:
Thanks for using JustAnswers.com