Do not have any caffeine in the afternoon or evening before an overnight sleep study. This includes coffee, tea, cola, and chocolate. Also avoid drinking any alcohol. You do not want any substance to affect your sleep. Try not to take any naps that day. Before going to the sleep center, wash your hair with shampoo only. Dry your hair and do not apply any hair sprays, oils or gels. If used, they could interfere with the sensors during the study.
Pack an overnight bag to take with you to the center. Bring comfortable pajamas and a change of clothes for the morning. Include the same items you would take for a stay at a hotel. You may also want to bring your own pillow. Bring your medications if you will need to take them while you are away from home. If you have special needs or concerns, tell the sleep center staff ahead of time. They will do all they can to help you feel relaxed and at ease.