Sildenafil at recommended doses has no effect in the absence of sexual stimulation.Do not use Viagra for a condition for which it was not prescribed.There were highly statistically significant improvements on the two principal IIEF questions (frequency of successful penetration during sexual activity and maintenance of erections after penetration) on Viagra compared to placebo.Physicians should advise patients of the potential for Viagra to augment the blood pressure lowering effect of alpha-blockers and anti-hypertensive medications.Nervous: ataxia, hypertonia, neuralgia, neuropathy, paresthesia, tremor, vertigo, depression, insomnia, somnolence, abnormal dreams, reflexes decreased, hypesthesia.These events, which may be accompanied by tinnitus and dizziness, have been reported in temporal association to the intake of PDE5 inhibitors, including Viagra.When Viagra was taken as recommended (on an as-needed basis) in flexible-dose, placebo-controlled clinical trials of two to twenty-six weeks duration, patients took Viagra at least once weekly, and the following adverse reactions were reported.

Find patient medical information for Viagra oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.The pharmacokinetics of sildenafil in patients with severely impaired hepatic function (Child-Pugh Class C) have not been studied.Skin and Appendages: urticaria, herpes simplex, pruritus, sweating, skin ulcer, contact dermatitis, exfoliative dermatitis.

Physicians should discuss with patients the increased risk of NAION in individuals who have already experienced NAION in one eye.It is essential to learn about the dosages and side effects of these.Results with all doses have been pooled, but scores showed greater improvement at the 50 and 100 mg doses than at 25 mg.

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However, in vitro studies with human platelets indicate that sildenafil potentiates the antiaggregatory effect of sodium nitroprusside (a nitric oxide donor).PDE5 inhibitors, including Viagra, and alpha-adrenergic blocking agents are both vasodilators with blood pressure lowering effects.Sign up for our email newsletter. order authentic viagra online.

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You can ask your healthcare provider or pharmacist for information about Viagra that is written for health professionals.

Rarely reported side effects include: an erection that will not go away (priapism).Viagra was administered to more than 3,000 patients aged 19 to 87 years, with ED of various etiologies (organic, psychogenic, mixed) with a mean duration of 5 years.Viagra has systemic vasodilatory properties and may further lower blood pressure in patients taking anti-hypertensive medications.

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This Patient Information leaflet summarizes the most important information about Viagra.

Also collected as part of the IIEF was information about other aspects of sexual function, including information on erectile function, orgasm, desire, satisfaction with intercourse, and overall sexual satisfaction.The FDA has established a reporting service known as MedWatch where healthcare professionals and consumers can report serious problems they suspect may be associated with the drugs and medical devices they prescribe, dispense, or use.Although the interaction between other protease inhibitors and sildenafil has not been studied, their concomitant use is expected to increase sildenafil levels.Studies have produced relevant data on the effects of Viagra on cardiac output.There were no severe adverse events potentially related to blood pressure and no episodes of syncope reported in this study.The time course of effect was examined in one study, showing an effect for up to 4 hours but the response was diminished compared to 2 hours.Therefore, inhibitors of these isoenzymes may reduce sildenafil clearance and inducers of these isoenzymes may increase sildenafil clearance.Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss.Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a rare condition and a cause of decreased vision including permanent loss of vision, that has been reported rarely post-marketing in temporal association with the use of all PDE5 inhibitors.

Combination with other PDE5 Inhibitors or Other Erectile Dysfunction Therapies.In the nonpregnant rat the AUC at this dose was about 20 times human AUC.Counseling of patients about the protective measures necessary to guard against sexually transmitted diseases, including the Human Immunodeficiency Virus (HIV), may be considered.Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg.

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Diary data indicated that on Viagra, 59% of attempts at sexual intercourse were successful compared to 13% on placebo.Get emergency medical help if you have any of these signs of an allergic reaction: hives.

In a double-blind study, 144 patients with erectile dysfunction and chronic stable angina limited by exercise, not receiving chronic oral nitrates, were randomized to a single dose of placebo or Viagra 100 mg 1 hour prior to exercise testing.These results demonstrated that the effect of Viagra on the primary endpoint was statistically non-inferior to placebo.Physicians should advise patients to stop taking PDE5 inhibitors, including Viagra, and seek prompt medical attention in the event of sudden decrease or loss of hearing.

Links to other sites are provided as a convenience to the viewer.There is a potential for cardiac risk of sexual activity in patients with preexisting cardiovascular disease.

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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.