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Currently, there are three oral medications terminator salvation asian actress in viagra by the FDA for the treatment of erectile dysfunction: sildenafil (Viagra), vardenafil (Levitra), and tadalafil (Cialis). They block the enzyme phosphodiesterase type 5 (PDE-5) and belong to a class called phosphodiesterase (PDE) inhibitors. Since introduction of the first PDE-5 inhibitor Viagra, there has been a fundamental change in the treatment of erectile dysfunction. Although there are a number of options available for non-surgical treatment, it is clear that oral therapy dosiering revolutionized the treatment approach to patients with erectile dysfunction. The development of the PDE-5 inhibitors Levitra and Cialis prompts the question of whether and how these sexual medications differ in terms of kolanuss dosierung viagra efficacy and adverse effects.

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Marmor MF "Sildenafil (Viagra) and ophthalmology. " Arch Ophthalmol 117 (1999): 518-9. Vobig MA "Retinal side-effects of sildenafil. " Lancet 353 (1999): 1442. Boshier A, Pambakian N, Shakir SA "A case of nonarteritic ischemic optic neuropathy (NAION) in a male patient taking sildenafil. " Int J Clin Pharmacol Ther 40 (2002): 422-3.

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