A member asked:

What is it the best way to get and keep an erection if you cannot take viagra (sildenafil)?

A doctor has provided 1 answer
Dr. Alvin Lin answered

Many options: Vacuum pump is a mechanical means to obtain an erection which is then maintained by placing a ring at the base of penis to restrict outflow. Alprostadil can be given as a shot or placed into the urethra to cause an erection. Urologists can surgically place penile implants to help achieve an erection.

Answered 3/16/2015

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Is it possible for an 80 year old get an erection without viagra (sildenafil)?

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