Tadalafil is the active ingredient in a branded drug called Cialis. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. While each PDE5 inhibitor differs slightly, they’re very similar in treating erectile dysfunction. The starting dose we generally recommend is the 10mg pill. There are many safe, reliable online services offering ED prescriptions. A higher dose of tadalafil is needed if your body does not respond to the recommended dose. It’s available in 10 mg and 20 mg tablets.Cialis is a long-lasting erectile dysfunction treatment, and is effective for up to hours. Cialis is available as tablets that you take daily (mg or 5mg) or just before you want to . Get Cialis and Tadalafil pill online. Try the generic Cialis option for a fraction of the cost, after speaking with one of our online medical professionals. stockcam / Getty Images What is generic Cialis? Generic Cialis is called tadalafil, which is the active ingredient in Cialis. Cialis is Food and Drug Administration (FDA) approved to .