Tadalafil is a molecule that acts on cGMP (inhibitors of phosphodiesterase), which causes it to act on the smooth muscle and increase blood flow in the corpora cavernosa of the penis, favoring the erection and making it more durable.
Therefore Cialis is used as a medication for erectile dysfunction, so it improves and promotes male sexual relations during 36h.
All the positive information and contraindications in the following video of MedicinaClara.

Medicina Clara with Doctor Bueno. Medicine videos on YouTube explained with easy words for the general audience. Clear Medicine becomes an excellent medical consultation tool for each person. Medicina Clara is a Youtube channel specialized in health, which offers reliable information managed by Doctor Bueno, Doctor surgeon and university professor.

To join as like a channel member:    / @medicinaclara  

http://www.medicinaclara.tv (vídeodiccionario MedicinaClara)
  / medicinaclara   (facebook MedicinaClara)
  / medicinaclara   (twitter MedicinaClara)
http://plus.google.com/+medicinaclara... (Google + MedicinaClara)
  / drbuenoenmedicinaclara