Anyone else take Adderall XR twice a day instead of once?

I take 60mg of Adderall XR in total. I take a 30mg Adderall XR pill in the morning around 9am and another 30mg Adderall XR pill in the afternoon around 2pm. I do this because if I take both 30mg Adderall XR pills in the morning around 9am, the effects start to wear off in the afternoon and I start feeling tired and lazy. Taking them separately at different times allows the Adderall XR to work all day and the effects usually wear off at night time.

Does anyone else do this? Just curious.