Cialis vs. Viagra: Effectiveness, Dosage, and Safety

Cialis and Viagra both work in very similar ways and have similar effects on your erections and sexual performance. Cialis and Viagra, as well as their generic equivalents, belong to a class of drugs referred to as PDE5 inhibitors. These medications work by inhibiting the actions of an internal enzyme called phosphodiesterase type 5 (or PDE5 viagra levitra and cialis The Food and Drug Administration has approved four similar drugs for erectile dysfunction, sold under such names as Viagra (sildenafil), Cialis (tadalafil), Levitra (vardenafil) and Stendra Cialis and Viagra are both phosphodiesterase type 5 (PDE5) inhibitors. PDE5 is an important enzyme involved in erections that s one of the biggest culprits behind ED. Here s how Cialis and

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