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Viagra (sildenafil) belongs to a class of medications, known as phosphodiesterase inhibitors, which are indicated for the treatment of erectile dysfunction in men. Other phosphodiesterase inhibitors include Levitra (vardenafil) and Cialis (tadalafil). These medications are not necessarily different types of Viagra, but treatment alternatives. Viagra, commonly referred to as the "little blue pill" was the first erectile dysfunction medication to be approved by the U.S. Food and Drug Administration (FDA). By inhibiting phosphodiesterase, Viagra enhances the effect of nitric oxide allowing for smooth muscle relaxation and increasing blood flow to specific areas of the body in the presence of sexual arousal or stimulation. Viagra exhibits no therapeutic responses in the absence of sexual stimulation. Possible side effects associated with treatment with Viagra include flushed skin, nausea or abdominal pain, congestion in the nose, diarrhea, vision clouded with a blue tint, headache and digestive problems. Reduced blood flow to the penis. This is, by far, the most common cause of ED in men over the age of 40. Like in other parts of the body, the arteries which take blood to the penis can become narrowed. The blood flow may then not be enough to cause an erection. Risk factors can increase your chance of narrowing of the arteries. These include getting older; high blood pressure; high cholesterol; smoking. levitra 20 mg There are several different devices. Basically, you put your penis into a plastic container. A pump then sucks out the air from the container to create a vacuum. This causes blood to be drawn into the penis and cause an erection. When erect, a rubber band is placed at the base of the penis to maintain the erection. The plastic container is then taken off the penis and the penis remains erect until the rubber band is removed (which must be removed within 30 minutes).Overdose changes in vision medicines called alpha-blockers such as Hytrin (terazosinNo tome vardenafil más de una vez al día. Permita que pasen 24 horas antes de tomar otra pastilla.

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CIALIS for Use as NeededBlood pressure was measured manually pre-dose at two time points (-30 and -15 minutes) and then at 1, 2, 3, 4, 5, 6, 7, 8, 10, 12 and 24 hours post dose on the first day of each doxazosin dose, (1 mg, 2 mg, 4 mg), as well as on the seventh day of 4 mg doxazosin administration.

These pharmacies have American doctors on staff to examine your medical records before they issue a prescription for Viagra. If you are a candidate for Viagra, your medication will be shipped straight to your door, overnight if necessary. How much does Viagra cost on these websites? They are all reasonably priced, but vary slightly from month to month. See the websites for their latest pricing before you buy Viagra online. cialis Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.Viagra is a prescription medicine used to treat erectile dysfunction (ED). You will not get an erection just by taking this medicine. Viagra helps a man with erectile dysfunction get and keep an erection only when he is sexually excited (stimulated).blurred visionDeje de usar vardenafil y llame de inmediato a su médico si usted tiene:

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