It was invented “Viagra”?
In the history of medicine has a lot of facts, when the emergence of miraculous discoveries were the result of random observations or findings. Two of the most striking example so far is the discovery of X-ray radiation and antibiotics.
In 1895 German scientist Wilhelm Conrad Röntgen drew attention to the unusual green light effect in the dark items that shortly before that time were employed in the vicinity of high - cathode tubes. He also drew attention to what was happening zasvechivanie packed photographic film, which was also near a high employee tubes. These unexpected observations allowed ingenious physics suggest the existence of radiation, which had not previously been known to mankind. In the future, as we know, so bold was fully confirmed.
The history of antibiotics is the opening sequence even more amazing coincidence. In 1928, a British researcher Alexander Fleming accidentally discovered that a dirty mold destroyed almost all types of bacteria, which he grew for bacteriological experiments. However, rather than subjecting laboratory dishes for growing bacteria sterilization experiments and start anew, Fleming carefully studied the properties of dirty mold, which we now known under the name “Penicillin.” So were opened antibiotics, which carried out the coup in medicine.
Opening “Viagra” was, apparently, the third greatest “accidental” discoveries in medicine. This is evidenced by the fact that all of the kind described above, were awarded the Nobel Prize. The same high honors in autumn 1998 was awarded to researchers find, among other things, properties “drug Viagra.”
The history of “Viagra” started in 1992 in Britain, in the locality of Pfayzers Sendvich in pharmacological research firm Pfizer. ” Researchers conducting clinical trials of new medicinal substance-Tsitrata Sildenafila, which was developed as a means to treat a number of cardiac ailments. Scientists had hoped that the citrate sildenafila will boost blood to the heart muscle and reduce blood pressure. However, it was noted that citrate sildenafila not have a significant impact on either the blood circulation in heart muscle (myocardium), or on blood pressure. Parallel found that many male patients who participated in the study, refused to return the pills sildenafila, despite the end of the test. The reason for the denial of all these patients was an all-hosting, they noted a sharp improvement in the quality erektsy. Thus, despite the minimal impact of new drugs on blood circulation in the heart, sildenafil caused sizeable inflow of blood to the male genitalia.
Researchers pharmacological companies “Pfizer” listened to the unexpected properties tsitrata sildenafila with due care and attention have been able to recognize it a powerful tool in the fight against violations erektsy. The new drug, has been termed the “Viagra” name - was born as a result of a merger would be the words “Vigor” (power, energy, strength), and Niagara is the most powerful waterfall in North America.
Since 1993, began extensive clinical trials necessary to demonstrate the properties of “Viagra”. As a result of these tests has been demonstrated high efficiency “Viagra” to treat impotency, and high security of this drug. And as a legitimate finals-March 27, 1998 The Department of dollars on food and medicines approved the use of “Viagra”.