They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction ED. Kidney disease that needs to be treated with dialysis. Its effects often last for 4 to 5 hours. This medication is taken with or without food an hour before sex. Often, these are prescribed for chest pain called angina. The products discussed in this site may have different product labeling in different countries. Oral medicines for ED usually work well and cause few side effects.$ retail Save 94% $ Get free savings directions Closest store Rite Aid. Viagra is available as the generic drug sildenafil. A generic drug is considered as safe and effective as the original drug. And generics tend to cost less than brand-name drugs. If . Many online companies claim to sell Viagra without a prescription, but this is illegal. What many of these sites actually sell is counterfeit Viagra. It is worth noting that these kinds of.