Do you take the XR version or do you take regular adderall? I've taken regular adderall on and off for the last 10 years. It helped me so much in the past but

Do you take the XR version or do you take regular adderall? I've taken regular adderall on and off for the last 10 years. It helped me so much in the past but I started to feel very fatigued by it. These days I have an extremely difficult time focusing and have been contemplating going back on it.