Silvitra is the trade name for sildenafil citrate and vardenafil citrate used in the same preparation for double effects. Sildenafil is the international nonproprietary name for Viagra, while vardenafil is a generic name for Levitra. Silvitra is an oral treatment for erectile dysfunction or impotence in men. Impotence is defined as an inability to achieve or maintain an erection sufficient for sexual activity. Silvitra helps restore erectile dysfunction by increasing blood flow to the penis. Sexual stimulation is necessary for the use and effectiveness of Silvitra. Silvitra is a treatment reserved for men.