So I've been taking Vyvanse for a couple of weeks now and I've found whilst I started really good taking my meds at 9am or so, I've ended up back to taking them at 12pm as I need a couple hours to wake up, and then I've found all day even after taking my meds I've been really sleepy till early evening then I'm awake.

Have I missed up my sleep rhythm or something? As of late I've been sleeping from 1am-10am and waking 1-2 times, so a lack of sleep hours isn't an issue, but I wonder if perhaps the sleep quality could be impacted by the meds.

I've got a medication review in a week, but meanwhile I was wondering if anyone else has had similar issues and what worked for them?