Both medications are PDE5 inhibitors, meaning that they are extremely useful for the treatment of erectile dysfunction. Tadalafil is its active ingredient and is available as a generic drug. Cialis works in two different ways. According to the FDA, generic medications contain the same active ingredients as brand names, meaning there’s no difference in effectiveness or safety. If you want your voice to be heard by your healthcare provider, this is the telehealth clinic for you! · Taking Cialis depends on why you need it. For erectile dysfunction (ED), as needed, start with 10 mg before sexual activity, and your doctor may adjust it to 20 mg or 5 mg. For daily use, take mg daily, possibly increased to 5 mg. 1. If you’re taking Cialis for benign prostatic hyperplasia (BPH), the standard dose is 5 mg taken. Cialis: available in doses of 5, 10, and 20 mg, starting at $65 per tablet; Daily Cialis: 5 mg tablet with pricing starting from $50 per tablet. Quoted prices are for cash-paying customers and are not valid with insurance plans. This price guide is based on using the discount card which is accepted at most U.S. pharmacies. A generic version of Cialis is available. .