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Vardenafil (Levitra) is almost 10 times more biochemically potent than sildenafil, therefore a lower dose is needed to facilitate the penile erection, potentially resulting in less side effects. Selectivity is the ability of the drug to attach to the specific enzyme PDE 5 found in penile tissues. Vardenafil (Levitra) is more selective than sildenafil and tadalafil (Cialis) to PDE5, which again means a lower dose is needed with potentially less side effects. Tadalafil is very specific for PDE5 and is also very specific for the enzyme PDE11.
And plenty of Cialis users will be more successful in achieving an erection after just 30 minutes. In comparison, Viagra or generic unbranded Sildenafil will need to be taken about an hour before anticipated sexual intercourse to give the best chance of effectiveness. Cialis is often called the "weekend pill" as it’s effects can last up to 36 hours, meaning your sex life can have a certain amount of sponteneity not possible with other erectile dysfunction drugs. Tadalafil often takes less than 30 minutes to take effect, which makes it quicker than other ED drugs.
Men who regularly require Cialis more than twice a week sometimes prefer to take a lower dose 2.5mg or 5mg tablet each day, at the same time of day. These low dose tablets are specifically for daily use and provide a continuous level of treatment. Although sildenafil and tadalafil are different drugs that both block PDE5, they do not complement each other. In fact,