Adderall 10mg is available as both immediate-release (IR) and extended-release (XR) formulations. Doctors will usually start patients at a low dose, such as 5mg or 10mg, that can be taken throughout the day. Adderall XR only needs to be taken once per day. Some doctors prefer Adderall IR because there are more flexible dosing options that go up incrementally, allowing them to better tailor a patient’s dose.