This is high blood pressure that occurs in the main artery that carries blood from the right side of the heart the ventricle to the lungs. Conclusion Purchasing Cialis online offers numerous advantages, from convenience to cost-effectiveness. Our erectile dysfunction Rx options We offer prescription medications clinically proven to help improve erections. You should take tadalafil one time a day. John’s wort. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. Kidney disease that needs to be treated with dialysis.When you buy from an unknown company, you run the risk of getting counterfeit medicines. By some estimates, more than half of all ED drugs sold online are fakes. Some of these drugs include. For the as-needed dose, plan to take Cialis at least 30 minutes before sexual activity, but bear in mind it may take as long as 2 hours to take effect. Also, Cialis requires sexual stimulation to. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide.