Comparison of ED Medications: Cialis, Viagra & Levitra
Levitra, Viagra, Cialis are drugs that belong to the group of phosphodiesterase inhibitors of type 5. The blood vessels leading to the corpus cavernosum are lined with smooth muscle cells. They constrict the arteries, preventing blood from entering the genital organ. To relax smooth muscles, cyclic guanosine monophosphate is needed. Its release launches the process…