Viagra (Sildenafil Citrate) is quite literally for many a wonder drug. It increases the blood flow to the penis and helps a man get an erection and indeed maintain it. Viagra is also used to treat hypertension too. Cheap viagra is available online meaning there is a discreet way to buy this effective drug. Our advice always remains the same though, it’s much better to talk to a health care professional first when thinking of taking any medication.