Active ingredients in Viagra and Levitra are almost identical to each other. The duration of effect totals 4-6 hr. According to customers’ reviews, Levitra has somewhat shorter reaction time – even though the official package inserts tell you to take Levitra 60 minutes before sexual activity and Viagra – 30 to 120 minutes before sex.
Cialis works faster, stays effective for longer periods of time, has fewer side effects and gives you erections even when taken along with fatty food or a little alcohol. It is a little more expensive, however, which prevents it from seizing the flawless victory in this battle of three.