The main measure of effectiveness was based on the ability of the men to get and maintain an erection. Can you buy Calpol in Spain? This medication is taken with or without food an hour before sex. Most Farmacias are open between the hours of am until 2 pm and then open again from around 5 pm to pm from Monday to Friday. Vardenafil usually works for 4 to 5 hours. This medication is taken with or without food an hour before sex.Save. I will be taking a holiday in Spain in a few days. I am wondering if I am permitted to carry Viagra through uk and spainsh customs in my suitcase. It will be a small amount. . Quite possibly. Many drugs that are prescription only in UK are available over the counter in Spain. I forgot to take my prescription indigestion tablets with me a couple of weeks ago . Viagra is used to treat adult men with erectile dysfunction (sometimes called impotence), when they cannot get or keep a sufficiently hard penis (erection) for satisfactory sexual .