Erectile dysfunction medications require a prescription from a licensed provider. It also alleviates the symptoms of benign prostatic hyperplasia i. To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and site usage information with other information we have about you. Tadalafil is also used in both men and women to treat the symptoms of pulmonary arterial hypertension to improve your ability to exercise. For example, in an article published in the journal Clinical Interventions in Aging, experts found that 88 percent of men with erectile dysfunction reported successful erections after using Cialis, versus approximately 64 percent of men who used a non-therapeutic placebo.Duration of effects. The biggest difference between Viagra and Cialis is the amount of time their effects last. Viagra remains effective for 4 to 6 hours, which offers ample opportunity to have sex on multiple occasions if you wish. However Cialis typically allows you to achieve erections for up to 36 hours after taking a tablet. Cialis is a medication approved by the Food and Drug Administration (FDA) often used to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BPH) in . Cialis: Cialis is often referred to as the “weekend pill” because it can provide effects for up to 36 hours. This longer erection time allows for more spontaneity in sexual activity. Viagra: Viagra typically remains effective for about 4 to 6 hours. Cialis provides penile hardness over a longer period than Viagra.