These include itraconazole Sporanox, Tolsura , ketoconazole Extina, Ketozole, others and ritonavir Norvir. When a man is sexually stimulated, his body’s normal response is to increase blood flow to his penis to produce an erection. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. This medicine is available only with your doctor’s prescription.Cialis, known by its scientific name ‘Tadalafil’, is a medication commonly known for treating erectile dysfunction (ED) and symptoms of benign prostatic hyperplasia (BPH). While it’s primary usage might be clear, the plethora of benefits it brings to one’s health is profound and worth exploring. Brand-name and generic Cialis: The price for brand-name Cialis can be pretty high and might be outside of many people’s budgets. We included services that offer brand-name Cialis and generic. Roman sells the following versions of Cialis: Generic: available in tablets of 5, 10, and 20 milligrams (mg), starting from $11 Daily Generic: available in doses of and 5 mg at $8 Branded.