Shift Work Disorder in a Nurse
A 32-year-old female nurse works rotating shifts: two day shifts (7 AM–7 PM) followed by two night shifts (7 PM–7 AM), then 4 days off. She reports difficulty sleeping during the day after night shifts and excessive sleepiness during night shifts, which has led to medication errors. She has no other medical or psychiatric conditions and takes no medications. She has tried sleep hygiene measures without success. She is seeking help to improve her sleep and alertness.
1. What is the most appropriate initial intervention for this patient's shift work disorder?
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The most appropriate initial intervention is behavioral and scheduling strategies. These include strategic napping before night shifts, maintaining a consistent sleep schedule, using bright light exposure during the early part of night shifts, and wearing sunglasses during the morning commute to avoid light exposure that can disrupt daytime sleep. Sleep hygiene education should be reinforced. If these measures are insufficient, short-term use of caffeine or modafinil (if approved) may be considered, but they are not first-line. Therefore, the initial intervention is behavioral and scheduling strategies.
2. If behavioral measures fail, what pharmacologic options are appropriate for shift work disorder, and what are the key considerations?
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If behavioral measures fail, pharmacologic options include caffeine (e.g., 200 mg at the start of the night shift), modafinil (approved for shift work disorder) taken before the night shift, or melatonin taken before daytime sleep. Key considerations include: caffeine should be used judiciously and not too close to the end of the shift to avoid interfering with daytime sleep; modafinil is a controlled substance and may have side effects (headache, nausea, anxiety) and interactions; melatonin is generally safe but evidence is modest. All medications should be used in conjunction with behavioral strategies. Therefore, appropriate options are caffeine, modafinil, or melatonin, with attention to timing and potential side effects.