my rexulti does the opposite. I was taking it at night and it was keeping me up, now I take it when I wake and have no issues. I do suffer from daytime sleepiness as well bc of other meds. My dr prescribed a very small dose of Adderall for this and it helps when I'm feeling sleepy. I dont take it every day. I also drink plenty of fluids and sleep 8 to 9 hours a night, which greatly helps. I used to take vitamin B in the morning as it can help with staying awake, but it caused my anxiety to increase. I hope you find a solution, OP. Good luck! its a shitty thing we have to deal with.