What viagra used for

In addition, patients were asked a global efficacy question and an optional partner questionnaire was administered.Treatment with doxazosin continued for at least 7 days after dose period 1.

In addition, the combination of heparin and Viagra had an additive effect on bleeding time in the anesthetized rabbit, but this interaction has not been studied in humans.All Consumer Professional Pill ID Interactions News FDA Alerts Approvals Pipeline Clinical Trials Care Notes Encyclopedia Dictionary Natural Products.Safety and effectiveness have not been established in pediatric patients.

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In placebo-controlled clinical studies, the discontinuation rate due to adverse reactions for Viagra (2.5%) was not significantly different from placebo (2.3%).When Viagra is taken with a high fat meal, the rate of absorption is reduced, with a mean delay in T max of 60 minutes and a mean reduction in C max of 29%.A total dose of 40 mg sildenafil was administered by four intravenous infusions.

Digestive: vomiting, glossitis, colitis, dysphagia, gastritis, gastroenteritis, esophagitis, stomatitis, dry mouth, liver function tests abnormal, rectal hemorrhage, gingivitis.

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You may take Viagra between 30 minutes to 4 hours before sexual activity if needed.Abnormal Vision: Mild and transient, predominantly color tinge to vision, but also increased sensitivity to light or blurred vision.In some of the cases, medical conditions and other factors were reported that may have also played a role in the otologic adverse events.Sildenafil is also marketed as REVATIO for the treatment of PAH.The use of Viagra offers no protection against sexually transmitted diseases.

Use caution when co-administering alpha-blockers with Viagra because of potential additive blood pressure-lowering effects.This is when a man cannot get, or keep, a hard erect penis suitable.This eMedTV segment describes how Viagra works to treat ED, and also covers off-label.Similar values for pharmacokinetic parameters were seen in normal volunteers and in the patient population, using a population pharmacokinetic approach.There were no severe adverse events potentially related to blood pressure and no episodes of syncope reported in this study.Although the interaction between other protease inhibitors and sildenafil has not been studied, their concomitant use is expected to increase sildenafil levels.A causal relationship between Viagra and these events has not been established.

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Diary data indicated that on Viagra, 48% of intercourse attempts were successful versus 12% on placebo.Ask your healthcare provider or pharmacist for a list of these medicines, if you are not sure.Physicians should advise patients to stop use of all PDE5 inhibitors, including Viagra, and seek medical attention in the event of a sudden loss of vision in one or both eyes.Serious cardiovascular, cerebrovascular, and vascular events, including myocardial infarction, sudden cardiac death, ventricular arrhythmia, cerebrovascular hemorrhage, transient ischemic attack, hypertension, subarachnoid and intracerebral hemorrhages, and pulmonary hemorrhage have been reported post-marketing in temporal association with the use of Viagra.NO then activates the enzyme guanylate cyclase, which results in increased levels of cyclic guanosine monophosphate (cGMP), producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood.

Sildenafil metabolism is principally mediated by CYP3A4 (major route) and CYP2C9 (minor route).Viagra can be used for its treatment according to the prescription of doctor.If a subject did not successfully complete this first dosing period, he was discontinued from the study.

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Diary data indicated that on Viagra, 59% of attempts at sexual intercourse were successful compared to 13% on placebo.Information about the drug sildenafil (Viagra) prescribed for the treatment of impotence (erectile dysfunction, ED) and pulmonary arterial hypertension.

In studies with healthy volunteers of single doses up to 800 mg, adverse reactions were similar to those seen at lower doses but incidence rates and severities were increased.The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation.Thereafter, 17 subjects were treated with Viagra 25 mg or matching placebo in combination with doxazosin 4 mg (15 subjects) or doxazosin 8 mg (2 subjects).When a single 100 mg dose of Viagra was administered with erythromycin, a moderate CYP3A4 inhibitor, at steady state (500 mg bid for 5 days), there was a 160% increase in sildenafil C max and a 182% increase in sildenafil AUC.PDE5 inhibitors, including Viagra, may potentiate the hypotensive effects of GC stimulators.Patients who demonstrate hemodynamic instability on alpha-blocker therapy alone are at increased risk of symptomatic hypotension with concomitant use of PDE5 inhibitors.