What is the difference between Viagra and Cialis?
Both these medians work the same way; they both work by relaxing arteries so that more blood could penetrate into penile tissues, and make veins contract to prevent outflow of the blood. This provides hard and long lasing erection. The difference consists in the activation time of the drugs and duration of the effect. The activation time for Cialis is 15 minutes, while for Viagra it is 30 minutes. Cilais lasts up to 16 hours, while Viagra may last 5 hours maximum.
