For other uses, see. Sildenafil, sold as the brand name. Viagra among others, is a medication used to treat erectile dysfunction and how much is viagra pulmonary arterial hypertension. 3, its how much is viagra effectiveness for treating sexual dysfunction in women has not been generic viagra demonstrated. 3, common side effects include como hacer viagra natural headaches and heartburn, as well as flushed skin. Caution is advised in those who have cardiovascular disease. Rare but serious side effects include prolonged erections, which can lead to damage to the penis, and sudden-onset hearing loss. Sildenafil should not be taken by people who take nitrates such as nitroglycerin (glycerin trinitrate as this may result in a severe and potentially fatal drop in blood pressure. 3, sildenafil acts by inhibiting cGMP-specific phosphodiesterase type 5 (phosphodiesterase 5, PDE5 an enzyme that promotes degradation of cGMP, which regulates blood flow in the penis. Pfizer scientists, andrew Bell, David Brown, and Nicholas Terrett originally discovered sildenafil as a treatment for various cardiovascular disorders. 4 5, since becoming available in 1998, sildenafil has been a common treatment for erectile dysfunction; its primary competitors what would happen if a woman takes viagra are tadalafil (trade name Cialis) and vardenafil (Levitra). Contents Medical whats viagra uses 50mg tablets of sildenafil Sexual dysfunction The primary indication of sildenafil is treatment of erectile dysfunction (inability to sustain a satisfactory erection to complete intercourse). Its use is now one of the standard treatments for erectile dysfunction, including for men with how much is viagra diabetes mellitus. 6 Antidepressant-associated sexual dysfunction Tentative evidence suggests that sildenafil may help men who experience antidepressant -induced erectile dysfunction. 7 Pulmonary hypertension While sildenafil improves some markers of disease in people with pulmonary arterial hypertension, it does how much is viagra not appear to affect the risk of death or serious side effects as of 2014. 8 Raynaud's phenomenon Sildenafil and other PDE5 inhibitors are used off-label to alleviate vasospasm and treat severe ischemia and ulcers in fingers and toes for people with secondary Raynaud's phenomenon ; 9 10 these drugs have moderate efficacy for reducing the frequency and duration. 9 As of 2016, their role more generally in Raynaud's was not clear. 10 Adverse effects In clinical viagra.com trials, the most common adverse effects of sildenafil use included headache, flushing, indigestion, nasal congestion, and impaired vision, including photophobia and blurred vision. 2 Some sildenafil users have complained of seeing everything tinted blue ( cyanopsia ). 11 Some complained of blurriness and loss of peripheral vision. In July 2005, the FDA found that sildenafil could lead to vision impairment in rare cases 12 and a number of studies have linked sildenafil use with non-arteritic anterior ischemic optic neuropathy. 13 Rare but serious adverse effects found through postmarketing surveillance include prolonged erections, severe low blood pressure, myocardial infarction (heart attack ventricular arrhythmias, stroke, increased intraocular pressure, and sudden hearing loss. 2 In October 2007, the FDA announced that the labeling for all PDE5 inhibitors, including sildenafil, required a more prominent warning of the potential risk of sudden hearing loss. 14 Interactions Care should be exercised by people who are also taking protease inhibitors for the treatment of HIV infection. Protease inhibitors inhibit the metabolism of sildenafil, effectively multiplying the plasma levels of sildenafil, increasing the incidence and severity of side effects. Those using protease inhibitors are recommended to limit their use of sildenafil to no more than one 25 mg dose every 48 hours. 2 Other drugs that interfere with the metabolism of sildenafil include erythromycin and cimetidine, both of which can also lead to prolonged plasma half-life levels. The use of sildenafil and an 1 blocker (typically prescribed for hypertension or for urologic conditions, such as benign prostatic hypertrophy ) at the same time may lead to low blood pressure, but this effect does not occur how much is viagra if they are taken at least. 15 Contraindications Contraindications include: 2 :11 Concomitant use of nitric oxide donors, organic nitrites and nitrates, 16 such as: Concomitant use of soluble guanylyl cyclase stimulators, such as riociguat Known hypersensitivity to sildenafil Sildenafil should not be used if sexual activity is inadvisable due. 18 Sildenafil's trade name, Viagra, is widely recognized in popular culture, and the drug's association with treating erectile dysfunction has led to its recreational use.

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InfoStat, can viagra prevent premature ejaculation, more Research Articles ». Google, sources: 1 See section 20 Part D Exclusions within chapter 6 (Rev. 10, 02-19-10) of the Pub. 100-18 Medicare Prescription Drug Benefit Manual. Centers for Medicare Medicare Services. Last accessed November 11, 2013. Some state pharmaceutical assistance programs offer assistance with regard to Medicare Part D excluded drugs. 2 Each category or class must include at least two drugs (unless only one drug is available for a particular category or class, or only two drugs are available but one drug is clinically superior to the other for a particular category or class regardless. The two drug minimum requirement must be met through the provision of two chemically distinct drugs. 30.2.1 - Formulary Categories and Classes within chapter 6 (Rev. There are exceptions to the two drug minimum in cases where unless only one drug is available for a particular category or class, or only two drugs are available but one drug is clinically superior to the other for a particular category or class. Medicare also requires that all, or substantially all, of the drugs in the following 6 drug classes to be covered: Antidepressant medications, antipsychotic drug medications, anticonvulsant medications, antineoplastic drugs (used by cancer patients immunosuppressant (used by transplant patients and antiretroviral (used by patients with HIV). 3 The catastrophic coverage protection within the Medicare Part D program only applies to on-formulary medications for an enrollee within a Medicare drug plan. See Understanding True Out-of-Pocket (TrOOP) Costs. Last accessed December 3, 2013. Drug sales are for all of the.S. Regardless of Medicare enrollment. 5 Some medications treat multiple conditions. 6 Biologics for Rheumatoid Arthritis Treatment. Generic Name: sildenafil (oral) (sil DEN a fil brand Names: Revatio, Viagra, medically reviewed on October 12, 2017. Viagra (sildenafil) relaxes muscles found in the walls of blood viagra drug class vessels and increases blood flow to particular areas of the body. Viagra is used viagra drug class to treat erectile dysfunction (impotence) in men. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. Do not take Viagra while also taking Revatio, unless your doctor tells you. Important information, some medicines can cause unwanted viagra drug class or dangerous effects when used with Viagra. Tell your doctor about all your current medicines, especially viagra drug class riociguat (Adempas). 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. Contact your doctor or seek emergency medical attention if your erection is painful or lasts longer than 4 hours. A prolonged erection (priapism) can damage the penis. Stop using Viagra and get emergency medical help if you have sudden vision loss. Before taking this medicine, you should not use Viagra if you are allergic to sildenafil, or: if you take other medicines to treat pulmonary arterial hypertension, such as riociguat (Adempas). Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems. This includes nitroglycerin, isosorbide dinitrate, and isosorbide mononitrate. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite poppers. Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

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