Viagra sildenafil pill main purpose is to help men who are facing a difficulty in achieving and maintaining an erection. It comes in doses of 25mg, 50mg, and 100 mg tablets. Its effect lasts up to 4 hours. These and many more answers on FAQs about Viagra sildenafil pill. --- Read more at Viagra Sildenafil Pill - For impotence treatment Buy Viagra sildenafil pill