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INDICATION VIAGRA (sildenafil citrate) is prescription medicine used to treat erectile dysfunction (ED). The rare side effects can include loss of vision/blindness, and a prolonged erection (greater than 4 hours). A: Brand-name prescription drugs are protected under patent. Disclaimer: Our goal is to provide you with the most relevant and current information. Hypersensitivity reactions have been reported, including rash and urticaria [see ADVERSE REACTIONS].

How does this affect behavior or alter men and women's sexual intimacy? Il fait partie de la classe des inhibiteurs de la PDE-5. This can result in the drug building up to toxic levels in the body. Although plasma levels of sildenafil at 24 hours post dose are much lower than at peak concentration, it is unknown whether nitrates can be safely co-administered at this time point [see CONTRAINDICATIONS]. Others were reported to have occurred hours to days after the use of VIAGRA and sexual activity. Although the interaction between other protease inhibitors and sildenafil has not been studied, their concomitant use is expected to increase sildenafil levels.

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When filling your prescription, be sure to call ahead to make sure your pharmacy carries it. Such an event may be a sign of non-arteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including possible permanent loss of vision, that has been reported rarely post-marketing in temporal association with the use of all PDE5 inhibitors.

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Nevertheless, Osol says the findings being reported "are exciting because they suggest that Viagra (or other drugs that inhibit PDE-5, the enzyme that normally inhibits blood vessels' ability to expand) may have beneficial effects in hypertensive pregnancy and, possibly, preeclampsia. We reinforce this constantly in our society (just look at ads – men are generally depicted as active, women as body parts, or still lives, or close-ups). Sudden Loss of Vision 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.

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Women writing to Dear Abby, for example, were either no longer interested in sex (and thus Viagra created new unwelcome pressure to be sexually active again), or fearing their husbands were having affairs in the context of their newfound sexual potency, and/or experiencing sometimes painful physiological effects of reigniting their sex lives later in life. The recommended initial dose for once daily Cialis treatment is 2. Examples of these drugs include: HIV drugs, such as ritonavir, indinavir, saquinavir, or atazanavir. It is hard to give yourself a stinging shot everyday if you think it is doing no good. A starting dose of 25 mg should be considered in patients with any degree of hepatic impairment [see DOSAGE AND ADMINISTRATION and CLINICAL PHARMACOLOGY]. The most common side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as changes in color vision (such as having a blue color tinge) and blurred vision; stuffy or runny nose; back pain; muscle pain; nausea; dizziness; rash. A: I do not know what strength Viagra (sildenafil) you take, but your physician may want to increase the strength you take. Drug Interaction Studies Effects of Other Drugs on VIAGRA Sildenafil metabolism is principally mediated by CYP3A4 (major route) and CYP2C9 (minor route). Patti Brown, PharmD Q: My husband is recovering from prostate cancer surgery and was told to take one-half of a Viagra pill every other day to increase blood flow.