The process is extremely simple and streamlined. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects. However, there will be some baseline similarities between each company. Some prescription medications may also have erectile dysfunction as a side effect. When taken at the correct time and paired with sexual stimulation, the erection lasts long enough for successful intercourse. Tell your doctor right away if you become pregnant.1. Check your insurance coverage. Since Cialis is available as a generic, many insurance plans now cover it (to varying degrees). Generally, Medicare does not cover Cialis, since it’s not considered medically necessary. 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. Price. FAQs. Generic vs. brand-name. Lowering long-term drug costs. Help paying for Cialis. Next steps. Introduction. If you’re looking at treatment options for erectile dysfunction (ED), you may.