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If a person has been told not to have sex by a healthcare provider, this recommendation needs to be discussed with a doctor before using Viagra or Levitra. As neither drug prevents sexually transmitted diseases, use pill a condom for protection is advised. Drug Interactions. Patients taking ;ills to lower blood pressure should use Viagra and Levitra under medical advice and with caution, Both medications enhance the effects of lowering blood pressure, so patients with hypertension and angina who are taking nitrates such as isosorbide dinitrate (Isordil), isosorbide mononitrate (Imdur, Ismo, Monoket), and nitroglycerin (Nitro-Dur, Transderm-Nitro), as female viagra pills video as alpha-blocking drugs such as terazosin (Hytrin), should avoid Viagra and Levitra, unless cleared by a doctor. A common side effect of Viagra and Levitra in these patients is chest pain and lowered blood pressure, conditions that require prompt medical attention. Other medications, such as Cimetidine (Tagamet), erythromycin, ketoconazole (Nizoral), itraconazole (Sporanox), and mibefradil (Posicor), can cause significant increases in the amount of sildenafil and vardenafil in the body, leading to a sudden drop in blood pressure. Patients on these medications should be impotenza psicologica e viagra dosage carefully when taking Viagra or Levitra. Similarly, Rifampin decreases the blood levels of sildenafil and can reduce its effectiveness. Vardenafil excretion is inhibited by erythromycin, ketoconazole (Nizoral), itraconazole (Sporanox), indinavir (Crixivan) and ritonavir (Norvir), so these drugs increase the concentration of vardenafil in the blood.

Cleveland Clinic, ‚Priapism. ‚ U. National Library of Femle. NIH. ‚Treatment of Nonarteritic Anterior Ischemic Optic Neuropathy. ‚ Next Article. Erectile Dysfunction Guide. further reading. Today on WebMD. Can You Avoid ED.

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These PDE-5 inhibitors share many similarities, but they have differences as well.

George Nurnberg, MD, of the department of psychiatry at the University of New Mexico School of Medicine, and colleagues found that 54. 5 of the men who took Viagra had much or very much improved scores on overall sexual function compared with only about 4 of those who did not take the drug. Researchers say measures of erectile function, arousal, ejaculation, orgasm, and overall sexual satisfaction improved significantly among the men treated with Viagra compared with those who received the placebo. The most common side effect was headache, occurring in 40 of patients who took Viagra. Both groups remained in relapse from depression throughout the study.

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