In 1998, Pfizer, Inc. received FDA approval to license Sildenafil Citrate for the treatment of ED under the brand name Viagra®. Their Patent has expired in Europe, it will expire in the US in 2020.
Sildenafil has been proven to be effective in helping men get an erection. It has been available since 2013 as a less expensive generic drug.
Viagra® is what the Brand Name Medication is. The name is not what helps a man's erection, it's Sildenafil Citrate, what the brand is made of. It could have been called anything, it's Sildenafil that does the work!
Pricing is one thing, quality is another. If we're swallowing something we want to be damn sure it's good for us. That's why there are standards. To assure quality and safety. The USA is not the only country in the world that has manufacturing regulations and standards, many countries do. Canada and India are two of them. Because of the variables that determine a product's cost, the same item in one country can sell for a different price in a different country.
That's why we advise purchasing medication for ED where the price is lowest. If the quality is the same, the dosage the same, the safety the same, why not save money and enjoy your sex life without financial concern.
Drug store chains all have their generic brands for many things, including medications whose patent has expired. Aspirin is aspirin whether it be a National brand name or the drug store chain's brand. The difference is always price. The Generic "Private Label" drug store chain price is always lower.
Sildenafil Citrate is the generic ingredient major pharmaceutical companies have used for ED. Under brand names there has been a monopoly, controlled by a patent that has expired in Europe and will expire in the US in 2020.