Viagra (sildenafil) and Cialis (tadalafil) are the most common drugs used to treat erectile disfunction among men. These are generally oral medications and are quite similar but differ in their reaction time, side effects etc. Viagra and Cialis are both PDE-5 inhibitors and function by obstructing phosphodiesterase type 5 and boosts nitric oxide in body. This results in prolonged erection due to increased blood flood through the relaxed muscles. However, while Viagra’s presence in system lasts for four to six hours, Cialis is recorded to be present in system for about seventeen to eighteen hours.
Both are suitable to be stored in room temperature. Effect of food prior or later to consumption of either doesn’t have any difference in performance. However, both has potential side effects and both have a potential for misuse.
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