You may be unable to get an erection at all, or you may lose the erection during before you are ready. Erectile Dysfunction (ED) Ciallis also referred to as impotence, is the inability to achieve or maintain an erection suitable for sexual intercourse. Find information about treatment, diagnosis and decision support. Find information about treatment, diagnosis and decision support. Patients should consult their doctors about using medicine and follow the erectile pill information. This page covers Cailis erectile dysfunction medications, including tablets cialas taken orally and drugs that are injected.