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Clinical studies have shown that when compared to placebo, Cialis and the other drugs in the same class, result in significant improvement in erectile function. Although established to be a safe and effective drug, Cialis is not appropriate for everyone and may not work in all cases. Cialis is one of a class of drugs known as PDE-5 (Phosphodiesterase type 5) inhibitors. Cialis and the other PDE-5 inhibitors can help men with erectile dysfunction (male impotence) by enhancing the erectile response when a man is sexually stimulated.

With increased blood flow, the penis can more easily receive blood to develop an erection during sexual stimulation. It also can alleviate symptoms of an enlarged prostate, such as&nbsp