Cialis is the brand name of a drug which is called "Tadalafil". It is used for treating erectile dysfunction (commonly known as Impotence). Cialis was approved for the use of ED patients at the end of 2003. Its main advantage over other drug treatments for erectile dysfunction is that it gives the patient 36-hour efficacy time, that's why it earned the nickname "The Weekend Pill." Cialis is offered in tablets of different strengths (dose to be determined by the patient's doctor). A cialis treated patient should take one tablet at least 15 minutes before sexual activity in order to be able to have an erection when sexually aroused. Cialis can be taken as often as once per 36 hours.
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