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viagra legal If you are taking certain other medicines your doctor may prescribe a lower starting dose and limit you to one dose of LEVITRA in a 72-hour (3 days) period.Product Information

If you have a low sex drive, or if you have had a previous head injury, ED may be due to a hormonal problem. In this situation a blood test to check the level of the hormone testosterone (and sometimes prolactin) may be advised.Some medicines used to treat seizures such as phenytoin, phenobarbitone and carbamazepineAbdominal pain

whats viagra The most commonly reported adverse reactions were headache, nausea, dyspepsia, back pain, myalgia, flushing, nasopharyngitis, and pain in the extremity. These adverse reactions were dose dependent, transient, and generally mild or moderate.[Ref]who prepare for it.5. loss of appetiteNasopharyngitis 5% 6% 6%

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Viagra does not work as well as it would otherwise if you eat a high-fat meal around the time you take it. Viagra should be taken on an empty stomach. Levitra may be slightly less effective if you eat a high-fat meal, but a moderate-fat meal does not reduce its effectiveness. Cialis works without regard to what you eat.18. Khandheria BK "Erection, erectile dysfunction: what has heart got to do with it?" Herz 28 (2003): 275-6

An erection that won’t go away: If you get an erection lasting more than 4 hours, seek immediate medical help to avoid long-term injury. levitra medication Critical revision of the manuscript for important intellectual content: All authors.The mean profiles of the change from baseline in standing systolic blood pressure in subjects treated with doxazosin in combination with 100 mg Viagra or matching placebo are shown in Figure 4.

Summary of the safety profile?do not take sildenafil if you are taking or have recently taken riociguat (Adempas) or nitrates (medications for chest pain) such as isosorbide dinitrate (Isordil), isosorbide mononitrate (Monoket), and nitroglycerin (Minitran, Nitro-Dur, Nitromist, Nitrostat, others). Nitrates come as tablets, sublingual (under the tongue) tablets, sprays, patches, pastes, and ointments. Ask your doctor if you are not sure whether any of your medications contain nitrates.