I used two cialis tablets and was not able to maintain erection

First what dosage, and why two ? Is not just ONE the correct dosage.

If your doctor gave it to you, I am sure he told you that it does not work every time ( it can let you down sometimes ,lol)

Also which type of cialis is this, they make a daily pill that you will have to take many days in a row to have any effect, or is it the one time use. Also how long did you wait before you tried sex, you have to wait about a hour for it to take effect.

But many men find cialis does not work, or does not work every time, as with the other types, They help, they normally work, but not always

Also if this was one of those "mail order" ones not from a local doctor, most of them are fake anyway.

The best person to talk to is your doctor... they know your medical history and what other factors that might cause this... Cialis or Viagra isn't a magic pill... if enough things are wrong you can't raise the flagpole.

It's a cumulative drug - you take it every day. One, two, five probably won't make a difference.

It is NOT Viagra!