It lasts 4 to 5 hours, or longer if you have mild to moderate ED. It works for up to 36 hours. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines. Reading about what’s good for you is even better. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. Men with the most severe erectile dysfunction saw the greatest benefit.This gem of a shop offers WONDERFUL and AMAZING treats. The Pain d’Epices is utterly delicious. The lovely proprietress, Mireille Oster, is happy to assist in selecting something from her wide variety of gingerbread and confections. The packaging is beautiful, the shopping bag is a keeper, and she even offered us a charming pop-up map of the city!Missing: viagra. Levitra 10 mg for Cheap Price Generic Viagra in Bulk for Wholesale Price $ – $ 2, Sale! Select options. Alternatives to Viagra Generic Viagra (Cenforce mg) – USA to USA Only $ – $ 1, Sale! Select options. Alternatives of Levitra Mix and Match $ . INTRODUCTION. VIAGRA 50MG TABLET contains Sildenafil which belongs to the group of medicines called PhosphodiesSterase type 5 (PDE 5) inhibitors. It helps in relaxing the blood vessels and allows more blood flow to the penis. Avoid taking heavy meals while taking VIAGRA 50MG TABLET, as it could delay the onset of action.