This is important for your overall health and safety, as certain medications can negatively interact with each other or cause existing conditions to worsen. Yes, ED pills can cause side effects. Insurance: If you plan to use insurance, make sure the online provider accepts it. Privacy: Confirm that your personal data and payment details are confidential. Read our editorial process. Insurance: If you plan to use insurance, make sure the online provider accepts it.Generic name: tadalafil [ ta-DAL-a-fil ] Brand names: Adcirca, Cialis Drug class: Impotence agents Medically reviewed by Sanjai Sinha, MD. Last updated on Uses Warnings Before taking Dosage Side effects Interactions FAQ What is Cialis? 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. · What is Cialis? Cialis is a brand-name prescription medication. It’s FDA-approved to treat the following in males:* erectile dysfunction (ED), a condition in which you can’t get or keep an.