Some people experience trouble sleeping or vivid dreams when they wear the patch for 24 hours. You could take the patch off before you go to sleep, but this might lead to withdrawal symptoms early in the morning. If you can tolerate the vivid dreams, they should improve as your body gets used to the 24 hour patch. If you are having trouble sleeping and are considering taking a sleep aid, please talk to your doctor first.
Source: (1) Abrams DB, et al. The Tobacco Dependence Treatment Handbook: A Guide to Best Practice. 2003. pp235-6