are allergic to sildenafil, as contained in Viagra® and Revatio, or any on the ingredients in Viagra®. Begin to see the stop of the leaflet for a whole listing of substances in Viagra®.Sildenafil je aktivna sestavina, ki jo vsebuje ve?ina u?inkovitih pripravkov za potenco. Ta komponenta zagotavlja pretok krvi v penis in povzro?a mo?no in trdno e