The company supplies ED medications, such as common and branded sildenafil and tadalafil, categorized as phosphodiesterase-5 PDE5 inhibitors. Tadalafil requires a prescription. This service is specifically designed to help those who would rather not visit a doctor in person, spend time waiting for appointments, and who desire a greater possibility of achieving powerful erections. Can I get generic Cialis mailed to me? Individuals who have had congestive heart failure, unstable angina, low blood pressure, or uncontrolled high blood pressure in the past should not take ED pills and should instead speak with a medical professional about other possible ways to treat erectile dysfunction. Disadvantages of Avanafil: Shorter duration: The effects of avanafil typically last for about 6 hours, which may be shorter compared to other ED medications.Along with other medications used to treat ED, Cialis and generic tadalafil are only available by prescription. Tadalafil, like other phosphodiesterase type 5 (PDE5) inhibitors, can. Tadalafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, tadalafil works by increasing blood flow to the penis to. Generic Cialis, or Tadalafil, is available in several doses in tablet form: milligrams (mg), 5 mg, 10 mg, and 20 mg. Depending on the dose for ED, you can use it as needed before sexual.