You're patient recently started a job as an emergency room nurse. She works rotating shifts, meaning that she sometimes works at night and sometimes during the day. She reports that she is frequently drowsy and that it is impacting her ability to work and drive safely.

Questions: Explain why your patient is experiencing these symptoms in terms of circadian rhythms, the suprachiasmatic nucleus, non-rem sleep, rem sleep, drugs and sleep, sleep disorders, or sleep depreciation. What would you recommend to this patient in terms of supplements and/or medications to help regulate her sleep/wake cycles and stay alert during her shifts?