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Patti Brown, PharmD Q: Is it safe to take Viagra? D., a professor at The Johns Hopkins University School of Medicine and its Heart Institute.  “Sildenafil effectively puts a ‘brake’ on chemical stimulation of the heart,” says Kass.  The researchers’ findings, which appear in the journal Circulation online Oct. Taking sildenafil with a nitrate medicine can cause a sudden and serious decrease in blood pressure.

A: Viagra (sildenafil) must be used with caution in patients taking an antihypertensive medication. You may take VIAGRA between 30 minutes to 4 hours before sexual activity if needed.

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Patti Brown, PharmD Q: Is it safe to take Viagra? We spoke with young men who had purchased Viagra out of insecurity—a "just in case" situation where they felt they had to live up to some social standard their first time and had purchased the pills (or borrowed them) to have some assurance of adequate performance. Approx 5 weeks ago I developed veins showing on both hands.

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Ritonavir And Other CYP3A4 Inhibitors Co-administration of ritonavir, a strong CYP3A4 inhibitor, greatly increased the systemic exposure of sildenafil (11-fold increase in AUC). A: Viagra (sildenafil) works by inhibiting the chemical phosphodiesterase, which leads to an increase in the effect of nitric oxide. 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. Sildenafil is only about 10-fold as potent for PDE5 compared to PDE6, an enzyme found in the retina which is involved in the phototransduction pathway of the retina. The maximum recommended dose is 100 mg with a maximum recommended frequency of administration of once daily. Viagra was originally developed by Pfizer but is now off patent and available as a generic.

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I dont have prescription so I can't get it from pharmacies... The primary measure in the principal studies was a sexual function questionnaire (the International Index of Erectile Function -IIEF) administered during a 4-week treatment-free run-in period, at baseline, at follow-up visits, and at the end of double-blind, placebo-controlled, at-home treatment. VIAGRA should be used with caution in patients with anatomical deformation of the penis (such as angulation, cavernosal fibrosis or Peyronie's disease), or in patients who have conditions which may predispose them to priapism (such as sickle cell anemia, multiple myeloma, or leukemia). When they looked at the individual measures, they found women treated with Viagra were significantly more likely to reach orgasm than those in the placebo group. Megan Uehara, PharmD Q: Is there a generic viagra available? A: Viagra (sildenafil) (//www.everydayhealth.com/drugs/viagra) is a phosphodiesterase type 5 inhibitor (PDE5). It is also the first PMED available for erectile dysfunction in the UK, meaning you can purchase without a doctor's prescription. Another thing to consider is that sexual activity is associated with a degree of cardiac risk. Viagra Connect Side Effects Viagra Connect has the same side effects as Viagra. Arruda-Olson AM, Pellikka PA "Appropriate use of exercise testing prior to administration of drugs for treatment of erectile dysfunction." Herz 28 (2003): 291-7 9.