Cialis is often compared with an array of similar medication drugs, such as Viagra, Levitra, Sildenafil, Adcirca, Staxyn, Vardenafil etc., for treating sexual dysfunction in males. Sexual dysfunction in men commonly includes conditions like erectile dysfunction (ED) or impotence, premature ejaculation (early orgasm), showing no interest in sexual desire and sex drive, and other associated conditions. Generally, these conditions are diagnosed and treated using medication drugs that are prescribed by licenced doctors and general practitioners (GP).