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This lower selectivity is thought to be the basis for abnormalities related to color vision [see Pharmacodynamics]. Feenstra J, vanDriePierik RJHM, Lacle CF, Stricker BHC "Acute myocardial infarction associated with sildenafil." Lancet 352 (1998): 957-8 16. Especially tell your healthcare provider if you take any of the following: VIAGRA does not protect against sexually transmitted diseases, including HIV. This way, it is possible to see what side effects occur, how often they appear, and how they compare to the group not taking the medicine.   Based on these studies, the most common side effects of Viagra (occurring in more than 2 percent of people) include:   Headaches --in up to 16 percent of people Facial flushing -- up to 10 percent Indigestion, known as dyspepsia -- up to 7 percent  Nasal congestion -- up to 4 percent Urinary tract infections (UTI) -- up to 3 percent Vision problems, including trouble telling the difference between blue and green, increased sensitivity to light, or blurred vision -- up to 3 percent Diarrhea -- up to 3 percent Dizziness -- up to 2 percent Unexplained rash -- up to 2 percent.   There were some other common side effects (also seen in more than 2 percent of people) that were just as common in people taking a sugar pill instead of Viagra as they were in people taking the actual drug. Whether or not Viagra is safe for you will depend on the reason for your heart valve replacement.

Of the twenty subjects who were ultimately assigned to treatment, a total of 13 subjects successfully completed dose period 1, and seven had successfully completed the previous doxazosin study (using VIAGRA 50 mg). Israilov S, Baniel J, Shmueli J, et al. "Treatment program for erectile dysfunction in patients with cardiovascular diseases." Am J Cardiol 93 (2004): 689-93 6. Most pharmaceutical companies then charge a lot of money for the drugs to make up for these costs.

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Furthermore, it was only possible that this side effect was related to treatment and a causal relationship to Viagra was uncertain. 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. Taking Viagra with a nitrate medicine can cause a sudden and serious decrease in blood pressure. 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). For more specific information, consult with your doctor or pharmacist for guidance based on your health status and current medications, particularly before taking any action.To bring you the best content on our sites and applications, Meredith partners with third party advertisers to serve digital ads, including personalized digital ads.

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The combination of medications can cause a serious drop in blood pressure. When you take the drug depends on the condition being treated: For ED: You can take this drug at any time of day.

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A: Brand-name prescription drugs are protected under patent. In fact, some of these side effects (such as high blood pressure) can be attributed to enjoying a healthy sex life as a result of taking Viagra. Read More Vietnam, Hep C was unknown then so I was treated for Hep B and believed cured until I started developing various side effects due to Hep C around 2000. Hypersensitivity Reactions VIAGRA is contraindicated in patients with a known hypersensitivity to sildenafil, as contained in VIAGRA and REVATIO, or any component of the tablet. However, it is now known that the drug does not increase heart-related deaths, say researcher Linda J. Testosterone is a steroid hormone present in both men and women that is responsible for sex drive. There were four subjects with a decrease from baseline in standing systolic BP > 30 mmHg following VIAGRA 100 mg, one subject with a decrease from baseline in standing systolic BP > 30 mmHg following placebo and one subject with a decrease from baseline in standing systolic BP > 30 mmHg following both VIAGRA and placebo. This can help prevent levels of this drug from building up in your body. Lori Mendoza, PharmD Q: Are there different types of Viagra? Lori Mendoza, PharmD Q: Are there different types of Viagra?