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    Tadalafil vs. Sildenafil: Which is Better? - REX MD

    Yes, Viagra (sildenafil) is only taken "as needed" with doses of 25 mg, 50 mg, and 100 mg. Cialis (tadalafil) can be prescribed for daily use with doses of 2.5 mg or 5 mg, but also "as needed" like Viagra at 10 mg or 20 mg. Since Cialis (tadalafil) will stay in your body longer, it changes the options for the prescription a little when ...

    Cialis vs Viagra, the treatments for ED - Simple Online Doctor

    Cialis, contains the active ingredient tadalafil which is also a PDE5 Inhibitor, increasing the blood flow to the penis. It is loved for its longer duration of effect. Cialis will not cause an erection without sexual stimulation. It has few dosing options. Cialis has a daily dose or an as-needed dose regime. The strengths vary from 2.5 mg to 20 mg.