The national flag and the text are an integral part of the logo. If you buy sildenafil for erectile dysfunction, it can also be known by the brand names Viagra, Aronix, Liberize and Nipatra. It comes as standard tablets, chewable tablets, and as a liquid that you swallow. Generic versions of sildenafil, vardenafil and tadalafil are available. This medicine is authorised for use in the European Union. If you have erection problems sildenafil works by temporarily increasing blood flow to your penis when you get sexually excited. It affects the way the medicine works.Getting a 3-month supply. You may be able to get a day supply of Viagra. If approved by your insurance company, getting a day supply of the drug could reduce your number of trips to the Missing: europe. Health editor, BBC News online. Men will no longer require a prescription to obtain the impotence drug Viagra and will instead be able to buy it over the counter at pharmacies. The decision. By Jim Edwards. Updated on: November 20, / AM / MoneyWatch. Pfizer continues to meet resistance to its attempt to transform Viagra from a legitimate drug for a real medical condition.