Diclegis making me so sleepy!

Anyone else taking diclegis and finding it wipes you out? I got it last week to ease my constant nausea and it does help a lot but the regular dose (2 pills at bedtime) makes me want to sleep for like 12+ hours. That's fine on the weekends but it's making me a zombie, which is not much better for work than feeling like crap w/out the medication while being fully awake. Any advice?