HOW DOES THE MEDICATION WORK?
Erectile dysfunction medication interferes with the process that allows blood to leave the penis.
Men with erectile dysfunction would benefit from having the chemicals leading to the erection outweigh the actions of the chemicals that cause the penis to lose its firmness, to have the systems that cause the INFLOW outweigh the chemicals that cause the OUTFLOW.
The chemicals that cause the OUTFLOW are called phosphodiesterases.
To give you a stronger erection, the medications block or inhibit the phosphodiesterases, which enables the blood vessels in the penis to stay open and receive more blood, creating a firmer and longer lasting erection.
This is why the drugs are called phosphodiesterase inhibitors (PDE-5 inhibitors for short).