The most common medications used to treat erectile dysfunction (ED) are Viagra, Cialis, Sildenafil, and Levitra. They belong to a class of drugs called phosphodiesterase 5 inhibitors (PDE5 inhibitors), which will be explained below. An erection occurs when someone is stimulated by an erotic thought or sexual contact. That leads to a series of chemical reactions in the blood vessels of the penis that results in 6 times the blood flow getting trapped in the penis. An erection might last indefinitely if it weren’t for chemicals called phosphodiesterases. They work at reversing the process that keeps the penis erect. Usually there is a balance between the chemicals that cause an erection and those that would return the penis to being flaccid. They pull in opposite directions with one dominating over the other in a perfect sequence that lets a man have an erection as long as it is needed. Levitra is an oral therapy for the treatment of erectile dysfunction. This monohydrochloride salt of vardenafil is a selective inhibitor of cyclic guanosine monophosphate (c GMP)-specific phosphodiesterase type 5 (PDE5). The active component of this medicine is Vardenafil. It affects particular brain zones, which are responsible for sexual excitement. It amplifies blood circulation in cavernous bodies of a penis and causes erection in case of stimulation of different erogenous zones. The principle of Levitra action is simple: this medicine blocks a chemical component, which interferes with the vasocongestion, and the brain gives certain signals that intensify emission of the chemical responsible for the normalization of blood circulation in the intimate organ. The duration of medicine’s action is about 5-6 hours, the exact time depends on specific features of an organism. Of course, it doesn't mean that the erection won't stop for several hours: you can have sexual contact at your convenience.
Mar 31, 2017. Vardenafil, or Levitra is effective in treating male erectile dysfunction, but users should be aware of the possible adverse effects. Find out more. Aug 18, 2014. Viagra, Levitra, Cialis – what's best? I am often asked which is the best of the three most common erectile dysfunction treatments Viagra.