Oral tablet: 2.5 mg, 5 mg, 10 mg, or 20mg Oral tablet: 20 mg, 40 mg Oral suspension: 20 mg per 5 mL: Typical dosage: As needed dosing: 5 20 mg prior to sexual activity Daily: 2.5 5 mg 5 mg once daily 40 mg once daily: Maximum dosage: Max dose if taken as needed: 20 mg Max dose if taken daily: 5 mg Max ivermectin-12mg.com Tadalafil comes as a tablet to take by mouth. It may be taken with or without food. If you are taking tadalafil to treat erectile dysfunction, follow your doctor’s directions and the guidelines in this paragraph. There are two different ways to take tadalafil, either daily or on an as needed basis.