Sildenafil citrate, the active ingredient in Viagra, is a PDE5 inhibitor that was introduced to the market in 1998. The patent for this well-known medication expired in 2013 and this established a basis for other leading pharmaceutical companies to manufacture generic Viagra and other Viagra alternatives.

People in the UK and Europe can buy Sildenafil online and now have a great selection of hard tablets, soft tablets and fast acting oral jelly versions to choose from as outlined in the table below – simply click on a product to view usage guidelines along with prices

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