Among the three drugs for impotence, Viagra was the first FDA approved drug for impotence. No doubt it attained high popularity. Later FDA approved two other medicines, Cialis and Levitra. All these medicines have the same functioning. They work by increasing the flow of blood towards penis.

So why would a person suffering from erectile dysfunction choose Cialis? Why is Cialis considered to be better choice? The answer to these questions lies in the time Cialis takes to be effective and the duration for which it is effective. Cialis is generally referred to as Weekend pill. After taking the recommended dosage for Cialis, it takes about 30 minutes to show its effect. Also, it remains effective for around 36 hours. This gives flexibility to a couple to choose their perfect moment as these impotence drugs are not responsible for sexual stimulation.

Cialis contains Tadalafil and is available in the dosage of 10mg and 20mg. It should be strictly taken as advised by the doctor. In other words, the purchase of Cialis should be followed only by the prescription of doctor.

New Cialis-a-day pill has also been launched which is prescribed to be taken daily. It comes in the tablet of 2.5mg and 5mg. Unlike traditional Cialis, this new Cialis-a-day helps a man in achieving an erection at any moment of a day.
Cialis is now available at online pharmacies. You should buy Cialis only from sources which will provide you with a prescription.