Sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are three remedies for erectile dysfunction, the mechanism of action of which does not differ from each other.
Meanwhile, for promotional purposes, manufacturers of each drug claim that it is better than others. If earlier, in the first Viagra advertising campaign, a middle-aged Senator Bob Dole was shot, now men of no more than forty are becoming heroes of the commercials.
How it works?
All three drugs belong to the group of phosphodiesterase inhibitors of the fifth type (PDE-5). It is an enzyme that suppresses the expansion of the blood vessels of the penis, and therefore – weakens erections. “Viagra” and “Levitra” are very similar in structure and properties, and the structure of “Cialis” is somewhat different.
But in practice, the main difference between the drugs is that one of them (“Levitra”) is absorbed faster, and the other – “Cialis” – is displayed more slowly. That is, the effect of all PDE-5 blockers is exactly the same in essence, but differs in the time of onset and the timing of action.
The first people who began to receive such drugs were people who got really impotence. On the prescription of a doctor, sex life could be adjusted to people suffering from diabetes, neurological disorders or side effects of antidepressants.
However, subsequently, the demand can viagra be bought over the counter increased sharply. First, the doctors began to write prescriptions to everyone who asked without any extra questions. Secondly, there were numerous online pharmacies that offered drugs for impotence without a prescription and with delivery.
Accordingly, the circle of buyers has expanded. “Patients” became healthy people who wanted to hedge against an exciting date.
Simply put, Viagra, Levitra and Cialis are now bought by anyone who wants to be confident in their sexual abilities, regardless of the circumstances. Manufacturers of drugs at the same time emphasize that the ingestion of food or alcohol does not affect their effectiveness.
Is it possible to try to recreate the collective image of the consumer of these “playful” drugs? According to psychologists, the need for “Viagra” and its counterparts is primarily detected in residents of large cities. The sexual revolution has led to the fact that more and more sexual contacts occur between unfamiliar people: work colleagues, met at a party or on an ad on the Internet.