Hydrocodone can make you sleepy due to its ability to cause respiratory depression, which means it slows down your breathing. Hydrocodone can make you very sleepy and drowsy due to its sedating effects. This can be troublesome if you need to stay awake to drive, work, attend school, or take care of children. Vicodin and Norco can also cause poor sleep quality, which will make you even more tired during the day. Dispose of any …