Viagra tablets and its uses

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In healthy male volunteers, there was no evidence of a clinically significant effect of azithromycin mg daily for 3 days on the systemic exposure of sildenafil or its major circulating metabolite. Viagra sildenafil and the other drugs for erectile dysfunction,Levitra vardenafil and Cialis tadalafilwork by inhibiting the chemical phosphodiesterase, which leads to an increase in the effect of nitric oxide.

Side Effects

Blood pressure was measured after administration of VIAGRA at the same times as those specified for the first doxazosin study. It should be taken 30 minutes to an hour before it is needed, but can be taken up to 4 hours before it is needed.

The concomitant administration of the protease inhibitor ritonavir substantially increases serum concentrations of sildenafil fold increase in AUC. Consider a starting dose of 25 mg in patients treated with strong CYP3A4 inhibitors e. Taking sildenafil with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack.

I recently suffered a mild stroke. Check with your doctor if you notice any symptom that worries you while you are taking this medication.

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Avoid using any other medicines to treat impotence, such as alprostadil or yohimbine, without first talking to your doctor. Viagra, commonly referred to as the "little blue pill" was the first erectile dysfunction medication to be approved by the U. When sexual stimulation causes local release of NO, inhibition of PDE5 by sildenafil causes increased levels of cGMP in the corpus cavernosum, resulting in smooth muscle relaxation and inflow of blood to the corpus cavernosum.

Administration of VIAGRA with nitric oxide donors such as organic nitrates or organic nitrites in any form is contraindicated. Sildenafil may be taken with or without food, but taking it with a high-fat meal may increase the time before the medication starts working.

US residents can call their local poison control center at VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if it is taken with certain other medicines.

What is Viagra?

Please leave us your comments and suggestions for improving DrEd, or email the team. Consult your doctor before breast -feeding. Single oral doses of sildenafil up to mg produced no clinically relevant changes in the ECGs of normal male volunteers. 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.

If you are taking any of these medications, speak with your doctor or pharmacist. Viagra begins to work within about an hour and the effects can last for up to four hours. If you have an erection that is painful or lasting longer than 4 hours, you should seek immediate medical attention.

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Percentage of Patients Reporting an Improvement in Erections. The effectivity of Viagra, or how long Viagra will last for, depends on a number of things. Rarely, a sudden decrease or loss of hearing, sometimes with ringing in the ears and dizziness, may occur. Since discovering Viagra my sex life and attitude has risen. Sildenafil, the active ingredient in Viagra, is also marketed as Revatio, which is indicated for the treatment of pulmonary arterial hypertension to improve exercise ability and delay clinical worsening in men and women.

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Viagra's main competitors are Cialis tadalafil and Levitra vardenafil.

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