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Check out side-by-side comparisons of all four drugs. Viagra, Cialis, Levitra, and Stendra are oral medications for treating erectile dysfunction. For further . You can buy Levitra tablets online from The Independent Pharmacy, quickly and discreetly in 5mg, 10mg & 20mg doses. We use cookies to offer you a better experience. These drugs work by blocking the PDE5. Viagra, Cialis, Levitra, and Stendra are all in a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil is similarly effective as sildenafil in the treatment of ED. In comparison. Tadalafil has a longer duration of action than sildenafil and vardenafil. Eddie by Giddy treatment is the most effective and affordable wearable in its class. A science-backed over-the-counter, body-safe, natural treatment for erectile dysfunction. You may also know them by their generic names: sildenafil (Viagra) tadalafil ; vardenafil (Levitra). Viagra, Cialis, Levitra, and Stendra are oral medications used to treat erectile dysfunction (ED). Ziel war die Behandlung von Bluthochdruck und Angina pectoris, bekannt als Brustenge. Sildenafil wird heute nicht nur zur Behandlung von Erektionsstörungen, sondern auch bei pulmonaler Hypertonie eingesetzt. Der Unterschied von Viagra, Cialis und Levitra liegt also nicht in der Funktionsweise als PDEHemmer, sondern vielmehr in den enthaltenen Wirkstoffen. Der Wirkstoff von Viagra: Sildenafil. Der Arzneistoff Sildenafil wurde durch Zufall von Pfizer entdeckt. You will be able to enjoy the benefits of this medication. Product Price Quantity Total; Sailor Professional Gear Fountain Pen - Sunset . Levitra 10/20/40mg works quick and lasts for hours. Tadalafil (Cialis) is as effective as sildenafil (Viagra), and vardenafil (Levitra) with similar side effects except for back pain that occurs occasionally with. The. The effects of Cialis (tadalafil) last much longer than those for Viagra or Levitra (up to 36 hours) so many men prefer it as involves less planning.