%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20100.6%2073.7'%20style='enable-background:new%200%200%20100.6%2073.7;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill:%23AF001E;}%20.st1{fill:%23FFFFFF;}%20%3c/style%3e%3cg%3e%3crect%20class='st0'%20width='100.6'%20height='73.7'/%3e%3cpath%20class='st1'%20d='M25.2,36.3l-0.5,2.3c-0.2,0.7-0.2,1-0.2,1.2c0,0.5,0.2,1,0.5,1.6L31.5,53c0.5,0.9,1,1.3,2.3,1.3h5.9%20c0.8,0,1.7-0.5,0.8-1.8l-7.9-13.1c2.7-1.7,5.6-4.1,5.6-9.3c0-6.8-3.8-10.6-12.2-10.6H13.9c-1.1,0-1.4,0.4-1.4,1.5v32%20c0,1.1,0.3,1.5,1.4,1.5h5c1.1,0,1.4-0.4,1.4-1.5V26h5.2c3.3,0,4.8,1.2,4.8,4.2c0,2.8-1.2,3.6-2.5,4.2C26.3,35,25.7,34.3,25.2,36.3z%20'/%3e%3cpath%20class='st1'%20d='M45.9,48.8L45.3,53c-0.1,0.8,0.3,1.1,1,1.2c1.6,0.2,5.5,0.5,9.4,0.5c8.6,0,14.9-2.8,14.9-10.9%20c0-4.7-2.1-8.3-9.2-10.1l-4-1c-2.7-0.7-4-1.6-4-3.6c0-2.8,2.6-3.4,5.1-3.4c3.4,0,6.8,0.3,8.1,0.4c1.4,0.1,1.8-0.1,2-1.2l0.7-4.1%20c0.1-0.8-0.3-1.1-1-1.2c-1.6-0.2-5-0.5-9.4-0.5c-9,0-13.3,3.9-13.3,10.1c0,5.6,3,8.9,8.3,10.3l4,1c3.3,0.9,4.7,1.8,4.7,3.9%20c0,3-2.1,3.6-7.1,3.6c-2.3,0-6.2-0.3-7.6-0.4C46.5,47.4,46.1,47.6,45.9,48.8z'/%3e%3cpath%20class='st1'%20d='M79.4,52.9c0,1.1,0.3,1.5,1.4,1.5h5c1.1,0,1.4-0.4,1.4-1.5v-32c0-1.1-0.3-1.5-1.4-1.5h-5%20c-1.1,0-1.4,0.4-1.4,1.5V52.9z'/%3e%3c/g%3e%3c/svg%3e)
Il Viagra compie vent’anni. Da quando è stato introdotto sul mercato, è diventato così famoso da essere ribattezzato come la "pillola blu”. Il farmaco contro le disfunzioni erettili è stato approvato dalla Food and Drugs Administration americana il 27 marzo 1998, e con la sua introduzione sul mercato ha cambiato anche i costumi facendo finalmente emergere dei problemi che prima erano “innominabili”.
Va detto che tra i vari primati del farmaco c'è anche quello di essere diventato il sinonimo della scoperta casuale di potenzialità di molecole. Il sildenafil infatti, il suo principio attivo, era studiato dall'azienda produttrice, Pfizer, come rimedio contro l'angina per la sua azione dilatatoria per i vasi sanguigni.
Nei test sull'uomo dei primi anni '90 i miglioramenti del problema cardiovascolare sono risultati minimi, ma si è notato soprattutto l'effetto collaterale dell'aumento delle erezioni. Da qui l'utilizzo “principe” del farmaco, che in Europa è avvenuta pochi mesi dopo l’esordio sul mercato USA.
Reuters/ANSA/EnCa
Entra nel canale WhatsApp RSI Info
Iscriviti per non perdere le notizie e i nostri contributi più rilevanti
https://whatsapp.com/channel/0029Vat6p4zL2ATyO8IRFJ2C
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20138.2%2048'%20style='enable-background:new%200%200%20138.2%2048;'%20xml:space='preserve'%3e%3cstyle%20type='text/css'%3e%20.st0{fill-rule:evenodd;clip-rule:evenodd;fill:%23AF001E;}%20.st1{fill-rule:evenodd;clip-rule:evenodd;fill:%23FFFFFF;}%20%3c/style%3e%3cpath%20class='st0'%20d='M0,48h138V0H0V48z'/%3e%3cpath%20class='st1'%20d='M9.3,31.7l-0.4,2.7C8.8,35,9,35.2,9.5,35.3c2,0.2,4,0.3,6.1,0.3c5.6,0,9.7-1.8,9.7-7.1c0-3.1-1.3-5.4-6-6.6%20l-2.6-0.7c-1.8-0.5-2.6-1-2.6-2.3c0-1.9,1.7-2.2,3.3-2.2c2.2,0,4.4,0.2,5.3,0.2c0.9,0.1,1.2,0,1.3-0.8l0.4-2.6c0-0.1,0-0.2,0-0.3%20c0-0.1-0.1-0.2-0.1-0.3s-0.1-0.1-0.2-0.2c-0.1,0-0.2-0.1-0.3-0.1c-2-0.2-4.1-0.3-6.1-0.3C11.8,12.4,9,14.9,9,19c0,3.6,2,5.8,5.4,6.7%20l2.6,0.7c2.1,0.6,3,1.2,3,2.5c0,2-1.3,2.3-4.6,2.3c-1.5,0-4-0.2-4.9-0.3C9.6,30.9,9.4,31,9.3,31.7'/%3e%3cpath%20class='st1'%20d='M36.4,23.6l-0.3,1.5C36,25.4,36,25.6,36,25.9c0,0.4,0.1,0.8,0.4,1.1l4.2,7.6c0.1,0.3,0.3,0.5,0.6,0.7%20c0.3,0.2,0.6,0.2,0.9,0.2h3.8c0.5,0,1.1-0.3,0.5-1.2l-5.1-8.6c1.7-1.1,3.6-2.6,3.6-6.1c0-4.4-2.5-6.9-7.9-6.9h-7.8%20c-0.7,0-0.9,0.2-0.9,1v20.8c0,0.7,0.2,1,0.9,1h3.2c0.7,0,0.9-0.2,0.9-1V16.8h3.3c2.1,0,3.1,0.8,3.1,2.8c0.1,0.6,0,1.2-0.3,1.6%20c-0.3,0.5-0.7,0.9-1.3,1.1C37.1,22.7,36.8,22.3,36.4,23.6z'/%3e%3cpath%20class='st1'%20d='M66.1,34V22.7c0-0.7-0.2-1-0.9-1h-5.8c-0.7,0-0.9,0.2-0.9,1v2.5c0,0.7,0.2,0.9,0.9,0.9h1.7v5%20c-0.6,0.1-1.1,0.1-1.7,0.1c-4.8,0-6-3.1-6-7.4c0-5.4,2-6.8,6.5-6.8c1.3,0,3.1,0.1,4.1,0.2c1,0.1,1.2,0,1.3-0.8l0.4-2.5%20c0.1-0.7,0-1-0.8-1.1c-1.8-0.2-3.6-0.3-5.4-0.2c-8.2,0-11.6,4.3-11.6,11.3s2.7,11.9,11.3,11.9c2,0.1,4,0,6-0.4%20C65.9,35.2,66.2,34.9,66.1,34'/%3e%3cpath%20class='st1'%20d='M74.9,31.7l-0.4,2.7c-0.1,0.5,0.2,0.7,0.6,0.8c2,0.2,4,0.3,6.1,0.3c5.6,0,9.7-1.8,9.7-7.1c0-3.1-1.3-5.4-6-6.6%20l-2.6-0.7c-1.8-0.5-2.6-1-2.6-2.3c0-1.9,1.7-2.2,3.3-2.2c2.2,0,4.4,0.2,5.3,0.2c0.9,0.1,1.2,0,1.3-0.8l0.4-2.6c0-0.1,0-0.2,0-0.3%20c0-0.1-0.1-0.2-0.1-0.3s-0.1-0.1-0.2-0.2c-0.1,0-0.2-0.1-0.3-0.1c-2-0.2-4.1-0.3-6.1-0.3c-5.8,0-8.6,2.6-8.6,6.6%20c0,3.6,2,5.8,5.4,6.7l2.6,0.7c2.1,0.6,3,1.2,3,2.6c0,2-1.3,2.3-4.6,2.3c-1.5,0-4-0.2-4.9-0.3C75.3,30.8,75,30.9,74.9,31.7'/%3e%3cpath%20class='st1'%20d='M93.1,31.7l-0.4,2.7c-0.1,0.5,0.2,0.7,0.6,0.8c2,0.2,4,0.3,6.1,0.3c5.6,0,9.7-1.8,9.7-7.1c0-3.1-1.3-5.4-6-6.6%20l-2.6-0.7c-1.8-0.5-2.6-1-2.6-2.3c0-1.9,1.7-2.2,3.3-2.2c2.2,0,4.4,0.2,5.3,0.2c0.9,0.1,1.2,0,1.3-0.8l0.4-2.6c0-0.1,0-0.2,0-0.3%20c0-0.1-0.1-0.2-0.1-0.3c-0.1-0.1-0.1-0.1-0.2-0.2c-0.1,0-0.2-0.1-0.3-0.1c-2-0.2-4.1-0.3-6.1-0.3c-5.8,0-8.6,2.6-8.6,6.6%20c0,3.6,2,5.8,5.4,6.7l2.6,0.7c2.1,0.6,3,1.2,3,2.6c0,2-1.3,2.3-4.6,2.3c-1.5,0-4-0.2-4.9-0.3S93.1,30.9,93.1,31.7'/%3e%3cpath%20class='st1'%20d='M120.2,23.6l-0.3,1.5c-0.1,0.3-0.1,0.5-0.1,0.8c0,0.4,0.1,0.8,0.3,1.1l4.2,7.6c0.1,0.3,0.3,0.5,0.6,0.7%20c0.3,0.2,0.6,0.2,0.9,0.2h3.8c0.5,0,1.1-0.3,0.5-1.2l-5.1-8.6c1.7-1.1,3.7-2.7,3.7-6.1c0-4.4-2.5-6.9-7.9-6.9H113%20c-0.7,0-0.9,0.2-0.9,1v20.8c0,0.7,0.2,1,0.9,1h3.2c0.7,0,0.9-0.2,0.9-1V16.8h3.3c2.1,0,3.1,0.8,3.1,2.8c0.1,0.6,0,1.2-0.3,1.6%20c-0.3,0.5-0.7,0.9-1.3,1.1C120.9,22.7,120.6,22.3,120.2,23.6'/%3e%3c/svg%3e)