Are over the age of 65 years Have or had Stroke, low blood pressure or uncontrolled high blood pressure Have liver or kidney problems Have sickle cell anemia an abnormality or disease of red blood cells , multiple myeloma cancer of bone marrow or leukemia cancer of white blood cells Are allergic to sildenafil or any other ingredients in Viagra Have peptic ulcers or other bleeding problems Have deformed penis shape Have a rare inherited eye disease called retinitis pigmentosa Ever had severe loss of vision, including a condition known as NAION Have had an erection that lasted for more than 4 hours What Medicines Can Interact With Viagra? If chest pains, dizziness, or nausea are experienced during sex, the exertion should be stopped and your doctor informed. How Does Viagra Work in the Body? Insurance: If you plan to use insurance, make sure the online provider accepts it. Viagra should be taken approximately 30 to 60 minutes before engaging in sexual activity. Finally, we checked customer reviews to better understand user experiences with each platform.You can order brand name medications as well as generic drugs through our secure site 24 hours a day or toll-free over the phone 7 days a week. Our Canadian online . One such supplier is test1.ru, which sells only FDA-approved medications, including Viagra, Cialis, Levitra, Staxyn and Stendra. test1.ru also sells generics for . CIALIS VIAGRA Toll Free Phone: Toll Free Fax: 24 hours / 7 days a week See what customers have to say about our products and services. .