WebMay 13, · Both Viagra and Cialis belong to a class of medications known as Phosphodiesterase Type 5 (PDE 5) inhibitors. The mechanism by which both these drugs work is the same. PDE 5 is an enzyme that .Even though priapism is an overall uncommon condition, it commonly occurs in people with preexisting health conditions such as those suffering from sickle cell anemia. Is 20mg of Cialis better than mg of Viagra? No matter what the case, talk to your physician, and under no circumstance whatsoever, adjust the dosage or combine these medications by yourself. Here’s some links:. However, it stays in your body for up to 36 hours and can be taken every 24 hours, so it can work for you constantly.WebOctober 9, Medically reviewed by Anthony Puopolo, MD For the vast majority of men of men dealing with erectile dysfunction, drugs like Viagra and Cialis will help them . WebFeb 24, · Need professional opinion about the risks involved in taking these two drugs (Cialis 5mg & Viagra 25mg) together. I am taking Cialis 5mg daily for BPH treatment. . WebAug 22, · How do ED medications work? Viagra, Cialis, Levitra, and Stendra are all in a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. These drugs .Phosphodiesterase type 5 PDE5 inhibitors. Both Cialis and Viagra are PDE5 inhibitors used for the treating of erectile dysfunction and impotence issues. If you ever have this problem after taking an ED drug s , your first line of defense should be Sudafed. Significant Differences Between Cialis and Viagra To help us understand why these two medications should not be combined, one should gain proper insight into the mechanism of action of both the pills. The typicaldose of Viagra is 50 mg.