okay first off 'deca dick' isn't caused by high prolactin or high progesterone. it is caused by high DDA because it swamps out your DHT in the body.. hence why you don't lose your head hair on deca.
so the solution is always run proviron with deca. guys in the old days used to do this before AI's or caber were ever even invented, they did not know why it worked, but it did. now we know why. so run proviron
and Viagra/Cialis will help increase blood flow to the penis, helping you achieve erection..