Tried Viagra and it didn’t work?

The appearance on the market of Viagra (Sildenafil) was a wonderful step forward for men with erectile dysfunction. It was the first in a family of medication called the PDEF5 inhibitors, of which there are now four sold in Australia. It has been joined by Tadalafil (Cialis), Avanafil (Stendra), and Vardenafil (Levitra). Millions of men […]