Vilitra 20 mg (vardenafil 20 mg) can sometimes be prescribed at a lower dose, but you should not assume that splitting the tablet will give an accurate 10 mg dose unless the specific tablet is designed to be split. Standard vardenafil tablets are available as 5, 10, and 20 mg strengths, so getting the appropriate lower-strength tablet is generally preferable to splitting a 20 mg tablet. The usual starting dose is 10 mg, with adjustment to 5 or 20 mg depending on effectiveness and tolerability, and it should not be taken more than once daily. If your particular Vilitra 20 tablet has a score line and its package information specifically says it can be divided, follow that instruction; otherwise, ask a pharmacist or doctor before splitting it. If you are considering half a Vilitra 20 mg tablet to take 10 mg, using a 10 mg tablet is the more reliable option.