Less serious Viagra side effects may include: warmth or redness in your face, neck, or chest; stuffy nose; headache; memory problems; upset stomach; or back pain. The pharmacokinetics of sildenafil in patients with viagra image impaired hepatic function (Child Pugh class C) have not been studied. Viagra Generic Name: sildenafil (oral) (sil DEN uh fil) Brand Names: Revatio, Viagra What is Viagra? Viagra relaxes muscles and increases blood flow to particular areas of the body. However, Viagra may be taken anywhere from 4 hours to 0.5 hour viagra image sexual activity.
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The erection goes viagra image Ask your health care provider any questions you may have about how to use Viagra. Headache 16% 4% Flushing 10% 1% Dyspepsia 7% 2% Nasal Congestion 4% 2% Urinary Tract Infection 3% 2% Abnormal Vision* 3% 0% Diarrhea 3% 1% Dizziness 2% 1% Rash 2% 1% Other adverse reactions occurred at a rate of >2%, but equally common on placebo: respiratory tract infection, back pain, flu syndrome, and arthralgia. The adverse events were viagra image transient and mild to moderate in nature. In trials of all designs, adverse events reported by patients receiving Viagra were generally similar. A prolonged erection (priapism) can damage the penis. The titration studies, in which most patients received 100 mg, showed similar results. If you become pregnant, contact your doctor. Viagra was shown to potentiate the hypotensive effects of nitrates and its administration in patients who use nitric viagra image donors or nitrates in any form is therefore contraindicated. It is not meant to take the place of your doctor's instructions. Store at room temperature away from moisture and heat. If you are taking medicines called alpha-blockers for the treatment of high blood pressure or prostate problems, your blood pressure could suddenly drop. • POSSIBLE SIDE EFFECTS Like all medicines, Viagra can cause some side effects. viagra image can help you have an erection when sexual stimulation occurs. Do not start a new medication without telling your doctor. Sildenafil and its major circulating N-desmethyl metabolite are both approximately 96% bound to plasma proteins. Taking Viagra with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack. One-third to one-half of the subjects in these studies reported successful intercourse at least once during a 4-week, treatment-free run-in period. These effects may be worse if you take it with alcohol or certain medicines.
What should I discuss with my healthcare provider before viagra image sildenafil? Do not take sildenafil if you are also using a nitrate drug for chest pain or heart problems. This lower selectivity is thought to be the basis for abnormalities related to color vision observed with higher doses or plasma levels (see Pharmacodynamics). Viagra is usually taken about 1 hour before sexual activity; however, it may be taken anywhere from 4 hours to a half hour before sexual activity. Do not take Viagra if you are also using a nitrate drug for chest pain or heart viagra image including nitroglycerin viagra image Nitrolingual, Nitro-Dur, Nitro-Bid, Minitran, Deponit, Transderm-Nitro), isosorbide dinitrate (Dilatrate-SR, Isordil, Sorbitrate), and isosorbide mononitrate (Imdur, ISMO, Monoket), or recreational drugs such as amyl nitrate or nitrite ("poppers"). There was no effect on sperm motility or morphology after single 100 mg oral doses of Viagra in healthy volunteers. Before taking sildenafil, tell your doctor about all other medications you use for erectile dysfunction, or if you are using any of the following medications: bosentan (Tracleer); cimetidine (Tagamet, Tagamet HB); conivaptan (Vaprisol); diclofenac (Arthrotec, Cataflam, Voltaren, Flector Patch, Solareze); imatinib (Gleevec); isoniazid (for treating tuberculosis); rifampin (Rifadin, Rimactane); an antidepressant such as nefazodone; an antibiotic such as clarithromycin (Biaxin), dalfopristin/quinupristin (Synercid), erythromycin (E.E.S., EryPed, Ery-Tab, Erythrocin), or telithromycin (Ketek); an antifungal medication such as clotrimazole (Mycelex Troche), itraconazole (Sporanox), ketoconazole (Nizoral), or voriconazole (Vfend); heart or blood pressure medication such as diltiazem (Cardizem, Dilacor, Tiazac), doxazosin (Cardura), nicardipine (Cardene), quinidine (Quinaglute, Quinidex, Quin-Release), or verapamil (Calan, Covera, Isoptin, Verelan); or HIV/AIDS medicine such as atazanavir (Reyataz), delavirdine (Rescriptor), fosamprenavir (Lexiva), indinavir (Crixivan), nelfinavir (Viracept), saquinavir (Invirase), or ritonavir (Norvir). The pharmacokinetics of sildenafil in patients with severely impaired hepatic function (Child Pugh class C) have not been studied. You may report side effects to FDA at 1-800-FDA-1088. You will not get an erection just by taking this medicine. This metabolite has a PDE selectivity profile similar to sildenafil and an in vitro potency for PDE5 approximately 50% of the parent drug. It is not possible to determine whether these reported events are related directly to the use of Viagra, to the patient’s underlying risk factors for hearing loss, a combination of these factors, or viagra image other factors (see PRECAUTIONS, Information for Patients). Pharmacokinetics and Metabolism Viagra is rapidly absorbed after oral administration, with a mean absolute bioavailability of 41% (range 25–63%).