How long after taking levitra will it start to work and how long can you wait before it no longer works?

Levitra (Vardenafil) has shown during clinical trials that it can work within some patients for as long as up to eight hours, however this may vary considerably from patient to patient and can get to work in as little as 30-90 minutes. This, when compared to rival treatment Viagra, is a vastly significant improvement with Viagra only managing to last for up to four hours which hardly give patients the opportunity to keep spontaneity in their sex lives which is one of the reasons people opt for the alternatives of either Cialis or Levitra over Pfizer's blue pill.