Levitra 2.5 mg is used to solve erectile disorders in adult men. The mechanism of action of Levitra 2.5mg is based on its ability to inhibit phosphodiesterase type 5 (PDE5), an enzyme that breaks down a chemical called cyclic guanosine monophosphate (cGMP). cGMP is responsible for relaxing the smooth muscles in the penis, which allows blood to flow into the cavernous bodies and causes an erection. It is safe for ED. But before you start taking it you first consult with your doctor about your health condition then use it.