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4Unfortunately, Viagra is a medication known to cause quite a few side effects, some of them quite serious. What is encouraging, however, is the fact that most people suffer from only the least serious side effects of Sildenafil, which include flushing, nasal congestion, minor vision and metabolism impairments. Severe side effects are observed in extremely rare cases and may include heart attack or stroke, sudden hearing loss, priapism and arrhythmia. If you experience any symptoms of the latter after taking Viagra, seek emergency medical assistance immediately. why is levitra so expensive When taking CIALIS once-a-day (5mg), it may take up to 1 week for a full effect on Erectile Dysfunction.The rate and extent of absorption of tadalafil are not influenced by food; thus Cialis may be taken with or without food.

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Advise patients to contact the prescribing physician if new medications that may interact with Levitra are prescribed by another healthcare provider.Since both Viagra and Levitra have moderate vasodilatory and hypotensive effects, they should not be given in the presence of marked arterial or orthostatic hypotension, and should only be administered with caution in aortic stenosis or hypertrophic obstructive cardiomyopathy. how to get viagra prescription 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.

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buying levitra online Effects of Vardenafil on Other Drugs?Guanylate Cyclase (GC) Stimulators, such as riociguat: Concomitant use is contraindicated [see Contraindications (4.2)].

Viagra (sildenafil) must be used with caution in patients taking an antihypertensive medication. You would want to discuss with your doctor what class of antihypertensive medication you are taking, what dose, and what the possible risks might be. Do not take Viagra (sildenafil) if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin (Nitrostat, Nitrolingual, Nitro-Dur, Nitro-Bid and others), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket). Taking sildenafil with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack.

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