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Manage sleep around shift work: a bedroom with blackout curtains drawn against the morning sun, an alarm clock, earplugs and a glass of water on the nightstand

Better Sleep

Manage Sleep Around Shift Work

Working nights or rotating shifts means asking your body to sleep when it is naturally alert, so some sleep loss is expected, and a few well-studied steps can reduce it. This page covers sleeping and staying alert around shift schedules; jet lag and ordinary bedtime habits have their own pages.

General information, not medical advice. Last updated October 31, 2026. Written by the AlternativeMed editorial team. Not medically reviewed.

Start here

  • Protect one block of sleep that stays at about the same clock time on workdays and days off (an anchor sleep), and add naps around it when you can.
  • Use bright light early in a night shift, cut light in the second half and on the way home, and make your bedroom dark and quiet for daytime sleep.
  • Plan the drive home: if you are drowsy after a night shift, nap before driving, share a ride or use another way home.

Be careful with

  • Drowsy driving after a night shift is a real hazard. In a study of nurses, sleepiness and risky driving events were highest on the commute after a night shift, even though drives were short.
  • Melatonin, caffeine pills and other sleep or alertness aids can interact with medicines and are not for everyone; ask a pharmacist or doctor, especially in pregnancy, breastfeeding or with a chronic condition. Never stop a prescribed medicine on your own.
  • Using alcohol to get to sleep after a shift makes the rest of the sleep worse; see the linked page.

Get help when

  • Sleepiness or insomnia that stays bad for a month or more on a shift schedule, or that you cannot manage with the steps here (these are the features of shift work sleep disorder).
  • Nodding off or near misses at work or while driving.
  • Loud snoring, gasping or choking in sleep, or restless legs, which can look like shift work fatigue but need their own assessment.
  • Low mood, constant worry, stomach or digestive problems, or heavy use of alcohol or sleep aids to cope.

About Manage Sleep Around Shift Work

What this goal means

Shift work includes nights, early starts and rotating schedules. The challenge is that your internal body clock keeps pushing you to be awake by day and asleep at night, so night workers tend to feel sleepy on shift and to sleep less and worse when they go to bed in the daytime.

This goal is about getting enough usable sleep and staying alert on shift. It is not about fixing the clock for life: many people on permanent nights keep a compromise schedule that also works on days off.

1,2

What it can feel like

Common experiences are heavy sleepiness in the small hours, short or broken sleep in the day, feeling wired when you want to sleep, difficulty winding down after a shift, and feeling out of step with family and friends. Some people feel worst on the first night of a run, others after several nights in a row.

3,4

What makes it harder

Light at the wrong time (morning sun on the way home), daytime noise and light in the bedroom, long stretches awake before a first night, rapid changes in schedule, caffeine late in the shift, alcohol to switch off, and family or household demands all cut into sleep. Medical causes such as sleep apnea, pain, and restless legs can add to it.

5,1,6

When it becomes a disorder

Shift work sleep disorder is the name for ongoing insomnia or excessive sleepiness linked to a night or rotating schedule. In a community survey of 2,570 working adults in Detroit, about 10 percent of night and rotating shift workers met the criteria, and they had more ulcers, sleepiness-related accidents, absenteeism and depression than shift workers without it.

The body-clock problems page explains the wider group of circadian conditions.

4,7

Realistic expectations

Most night workers do not fully adapt, and the studies are modest. A Cochrane review of 17 trials of non-drug methods (bright light, napping and others) found the evidence low to very low quality and the results inconclusive, so treat each tip as something to try and track, not a guaranteed fix. A Cochrane review of drug and supplement trials found melatonin after a night shift may add about 24 minutes of daytime sleep (low quality evidence).

Expect to build a routine over a few weeks and to adjust it as your rota changes.

2,8

Who this applies to

Anyone who works nights, evenings, early mornings or rotating shifts, including healthcare staff, drivers, factory and warehouse workers, and security staff. Pregnant people, older adults, people with heart, metabolic or mood conditions, and those taking regular medicines should talk to a clinician before trying supplements. Travel across time zones is covered in Adjust to Jet Lag.

7

Related conditions and symptoms

A manageable starting plan

An educational starting point, not a personal prescription. Adjust it to your own situation and any advice from your clinician.

Your first actions

  • Protect an anchor sleep block that stays at the same clock time on work days and days off.
  • Make the bedroom dark and quiet, and plan the commute home so you are never driving drowsy.
  • Use light early in the shift, naps if allowed, and caffeine early; stop caffeine several hours before sleep.
  • Keep a sleep diary for two to four weeks.

Optional additions

  • Add a short nap before a first night shift.
  • Ask a pharmacist about melatonin if you want to try it.
  • Request rota changes (forward-rotating and fewer rapid flips) if you can.

What to track

  • Sleep and wake times, naps, caffeine, alcohol and light on the way home.
  • Sleepiness on shift and near misses on the road.
  • Any supplement or medicine and how you sleep afterward.

When to reassess

Give a routine about two to four weeks. If you are still very sleepy, are nodding off, or have had a close call, see a clinician.

When to seek professional support

  • See a doctor if symptoms last a month or more or affect safety or mood.
  • Ask about assessment for sleep apnea and for shift work disorder.
  • Consider talking to occupational health about your rota.

What helps

Ordered by how well the research supports each step. Evidence strength is shown on every card; precautions sit next to the advice.

Start here

Anchor sleep: keep one block of sleep at the same clock time

Moderate certainty

Addresses: Keeps part of your body clock steady across work days and days off

Why it may help: NIOSH training for nurses suggests a compromise schedule in which some sleep hours are the same every day. For example, after nights sleep as soon as you get home, and on days off stay up late and sleep until around noon, so a shared block (such as 8 a.m. to noon) is kept on both. Swinging fully between night and day schedules can leave a lasting jet-lag-like state. The AASM practice parameters give planned sleep schedules their strongest rating (Standard) for shift work disorder.

How to apply it: Pick the block that fits your family and rota, put it in your calendar, and protect it. Add a second shorter sleep before or after as needed.

Who it may suit: Night and rotating shift workers.

Precautions: Do not use the day off to stay awake for 24 hours or more; long stretches awake raise the risk of accidents.

1,7

Nap before and during night shifts

Low certainty

Addresses: Reduces sleepiness and improves alertness for a while

Why it may help: A systematic review of 13 studies found that planned naps during night shifts usually reduced sleepiness and improved performance, with a short period of grogginess (sleep inertia) after waking; none looked at safety outcomes. In a lab study of 68 people and a field study of 53 shift workers, an evening nap before the first nights plus caffeine improved alertness and performance. A Cochrane review rated the nap evidence very low to low quality.

How to apply it: Try a short nap (NHS trust guides suggest about 15 to 20 minutes, no longer than 45) before a night shift or in a break if your workplace allows it, and allow 15 to 30 minutes to wake up fully before safety-critical tasks.

Who it may suit: Anyone who feels very sleepy at night, where workplace rules allow.

Precautions: Napping on shift may not be permitted or safe in every job. Longer naps cause more grogginess on waking.

9,10,2

Use bright light early in the shift and cut light later

Low certainty

Addresses: Helps alertness at work and sleep afterward

Why it may help: NIOSH advises time in a brightly lit area in the first half of a night shift to stay alert, and less light in the second half so it is easier to sleep after getting home. A Cochrane review pooled two trials (184 people) and found bright light at night reduced sleepiness by about 0.8 points on a 7-point scale, but rated the evidence very low quality.

How to apply it: Work in the brightest area you can early in the shift. Dim your own light later, and avoid screens and bright kitchens before bed.

Who it may suit: Night workers who can control their lighting.

Precautions: Bright light can keep you awake if used late in the shift. A sleep specialist can fine-tune timing.

5,2

Make the bedroom dark, quiet and cool for daytime sleep

Moderate certainty

Addresses: Protects the sleep you do get

Why it may help: NHLBI lists a quiet, dark, relaxing and cool bedroom as a core sleep habit. The same applies to daytime sleep, when daylight and noise are the main obstacles.

How to apply it: Fit blackout curtains or blinds, use earplugs or steady white noise, set phones to do-not-disturb and ask the household to hold calls and noise during your sleep block.

Who it may suit: Anyone sleeping by day.

Precautions: Keep a smoke alarm and an emergency contact route working if you use earplugs.

6

Time caffeine early in the shift and stop well before sleep

Moderate certainty

Addresses: Improves alertness without wrecking sleep

Why it may help: A Cochrane review of 13 trials, mostly young people in simulated conditions, found caffeine may improve performance in shift workers and reduced errors in two trials; none measured injuries. Another Cochrane review found caffeine plus pre-shift naps decreased sleepiness. NHLBI advises avoiding caffeine for at least about six hours before bed.

How to apply it: Use your normal caffeine early or in the middle of the shift, then stop several hours before your planned sleep, not at the end of the shift.

Who it may suit: Adults who already use caffeine.

Precautions: Caffeine can cause jitteriness, palpitations and anxiety, and is a concern in pregnancy at high intakes; keep your usual amount.

11,8,6

Additional options

Eat regular light meals and avoid heavy meals before sleep

Low certainty

Addresses: May ease digestion and sleep

Why it may help: NHLBI notes that a light snack at bedtime is fine but large meals can disturb sleep. Shift workers in the Detroit survey with shift work sleep disorder reported more ulcers, so gentle, regular eating is a sensible habit.

How to apply it: Eat your main meal early in the shift, take light snacks, and keep water handy.

Who it may suit: Night workers with digestive upset.

Precautions: Not a treatment; see a clinician for ongoing stomach pain.

6,4

Limit rapid schedule flips and long stretches awake

Moderate certainty

Addresses: Cuts accident risk and sleep debt

Why it may help: NIOSH advises against staying awake all day before the first night shift or all day after the last. In the nurse driving study, hazards rose after 16 or more hours awake.

How to apply it: Take a short sleep before the first night and a shorter sleep after the last, then go to bed earlier that night.

Who it may suit: Rotating shift workers.

Precautions: Do not drive when sleepy.

1,3

Keep a sleep diary and share it with a clinician

Moderate certainty

Addresses: Shows patterns and supports treatment

Why it may help: The AASM practice parameters say a sleep log is indicated in assessing suspected circadian rhythm sleep disorders, and actigraphy can help.

How to apply it: Record sleep times, naps, caffeine, light, shifts and how alert you felt for two to four weeks.

Who it may suit: Anyone with persistent trouble.

Precautions: None.

7

Still being studied

Planned light and darkness schedules (specialist-guided)

Low certainty

Addresses: Can shift the body clock toward a compromise position

Why it may help: In a lab study of 19 healthy people on simulated night shifts, a program of timed bright light, dark sunglasses outdoors, scheduled dark sleep and afternoon light moved the body clock to a compromise phase and improved night-shift performance. This was a small lab study.

How to apply it: Ask a sleep specialist before attempting timed light and sunglasses; the wrong timing can make things worse.

Who it may suit: People on long runs of permanent nights.

Precautions: Dark sunglasses on a drive home can worsen drowsy driving; NIOSH advises wearing them only if someone else drives.

12,5

Timed melatonin after the night shift

Low certainty

Addresses: May add some daytime sleep time

Why it may help: A Cochrane review (low quality evidence) found melatonin 1 to 10 mg after the night shift may increase daytime sleep by about 24 minutes, with no clear effect on how long it takes to fall asleep. A 2022 systematic review of 10 trials in health workers (low-grade evidence) reported decreased daytime sleepiness and increased sleep time.

How to apply it: If you try it, discuss product, timing and any medicines with a pharmacist or clinician first.

Who it may suit: Adults without contraindications, after advice.

Precautions: Can cause drowsiness; avoid before driving. Not for pregnancy, breastfeeding or children without medical advice.

8,13

Learning your own chronotype and shift tolerance

Not enough evidence

Addresses: May help choose which shifts suit you

Why it may help: The AASM report considered chronotype questionnaires but found insufficient evidence to justify routine use in clinical evaluation of shift work disorder, so this is a self-awareness tool only.

How to apply it: Notice whether you cope better with early or late shifts and raise it when requesting rotas.

Who it may suit: Anyone with a choice of shift.

Precautions: Not a diagnostic test.

7

Food & nutrition

Eating and drinking around shifts

NHLBI advises that a light snack is fine near bedtime but large meals can interrupt sleep, and that caffeine, alcohol and nicotine should be avoided in the hours before bed. For nights, many people eat their main meal early in the shift, then small snacks and water, and a light meal after work. These are habit tips from health agencies rather than proven treatments.

6

Caffeine timing

Reviews support caffeine for short-term alertness (see above), but there is no benefit in taking it near the end of a shift. Pair a small amount before or at the start of the shift with an evening nap for the best-studied effect.

  • Early in the shift: your usual coffee or tea.
  • Stop several hours before your planned sleep.
11,10

Remedies & supplements

Traditional use, laboratory findings and human trials are kept apart. "Natural" does not mean safe.

Melatonin

Low certainty

Studied form and route: Oral supplement taken after the night shift or before the planned sleep block

Intended outcome: Modestly longer daytime sleep

Human evidence: A Cochrane review of seven trials (263 people) found melatonin 1 to 10 mg after the night shift may increase daytime sleep by about 24 minutes (low quality evidence), with no clear effect on sleep latency. A 2022 systematic review of 10 trials in health workers rated the evidence low (1- on the SIGN scale).

Limits: Small gains, mixed products, no dose-response, long-term safety unknown. Trials differ in dose and timing.

Interactions and precautions: Can cause drowsiness; do not drive. Interactions with medicines; not for pregnancy, breastfeeding or children without medical advice.

8,13

Caffeine, with a pre-shift nap

Moderate certainty

Studied form and route: Coffee, tea or measured caffeine early in the night

Intended outcome: Better alertness and fewer errors

Human evidence: A Cochrane review of 13 trials found caffeine may improve performance, with errors reduced in two trials, though none measured injuries. A lab study of 68 people and a field study of 53 shift workers found nap plus caffeine best improved alertness.

Limits: Most data come from young people in simulated conditions.

Interactions and precautions: Can cause anxiety, palpitations and poor sleep; keep intake moderate, and discuss with a doctor if you are pregnant or have a heart condition.

11,10

Bright light early in the shift

Low certainty

Studied form and route: Brightly lit work area

Intended outcome: Less sleepiness on shift

Human evidence: Two trials (184 people) pooled in a Cochrane review found a reduction of about 0.83 points on the Stanford Sleepiness Scale; evidence very low quality.

Limits: Small trials, different light devices.

Interactions and precautions: Avoid bright light late in the shift and on the way home. People with light-sensitive eye or mood conditions should ask a clinician.

2,5

Therapies & care

Established professional care for shift work disorder starts with a clinician checking for other causes, such as sleep apnea, and agreeing a planned sleep schedule, timed light and, where suitable, other measures. This page does not recommend medicines or doses, and you should never stop a prescribed medicine on your own.

Planned sleep schedule with a clinician

Moderate certainty

Behavioral The AASM practice parameters rate planned sleep schedules as a Standard for shift work disorder. A sleep clinician helps build one around your rota.

Who it may suit: Anyone with ongoing symptoms.

Precautions: Needs regular review as your rota changes.

7

Sleep disorder assessment

Moderate certainty

Medical evaluation A clinician can rule out sleep apnea, restless legs, depression and medicine effects, and use a sleep log and actigraphy to judge the problem.

Who it may suit: Persistent sleepiness or insomnia.

Precautions: Bring a sleep diary and a medicine list.

7

Prescribed alerting or sleep medicines

Moderate certainty

Clinician-directed In a Cochrane review, prescription alerting drugs reduced sleepiness a little in people with shift work sleep disorder but caused side effects; a hypnotic trial did not help daytime sleep length. These decisions belong with a clinician.

Who it may suit: Selected patients only.

Precautions: Do not start, change or stop on your own.

8,7

What to avoid

Habits, products and claims that can get in the way. Never stop a prescribed medicine without talking to the professional who prescribed it.

Risks that apply to most people

Driving home drowsy after a night shift

Moderate certainty

Why: In the nurse study, sleepiness and hazardous driving events were highest on the post-night-shift commute, and rose with 16 or more hours awake, particularly near the body clock's peak sleepiness.

Who it applies to: Anyone finishing nights or an early start after a long shift.

Try instead: Nap before driving, share a ride, use public transport or a taxi, and stop to rest if you feel drowsy.

3,5

Alcohol to get to sleep

Moderate certainty

Why: It may help you drop off but disrupts the rest of the sleep and worsens next-shift alertness.

Who it applies to: Anyone using a drink to switch off after a shift.

Try instead: Wind down with a dim, quiet routine; see the linked page.

6

Staying awake all day before your first night shift

Moderate certainty

Why: Long wakefulness raises accident risk and builds sleep debt.

Who it applies to: Rotating shift workers.

Try instead: Take a nap before the first night.

1

Personal triggers to check

Bright morning light on the way home

Low certainty

Why: NIOSH notes that light has an alerting effect and works against sleep once you are home.

Who it applies to: Night workers who walk or ride home in the sun.

Try instead: Dim light in the last part of the shift; sunglasses only if someone else drives.

5

Caffeine late in the shift

Moderate certainty

Why: Caffeine lasts for hours and can delay or fragment the daytime sleep you need.

Who it applies to: Heavy caffeine users.

Try instead: Take your caffeine early and stop several hours before the planned sleep.

6,11

Products that need caution

Long-term use of over-the-counter or prescribed sleep medicines on your own

Low certainty

Why: The Cochrane review found a single low-quality trial of a hypnotic that did not improve daytime sleep; the AASM practice parameters say hypnotics may be indicated for daytime sleep in night workers, which is a clinician decision.

Who it applies to: Anyone using sleep medicines most days.

Try instead: Talk to a clinician about other options; do not stop prescribed medicines on your own.

8,7

Stimulant or energy products to get through nights

Moderate certainty

Why: Energy drinks and caffeine pills raise intake quickly and can cause palpitations and anxiety; prescription alerting drugs belong to clinicians, and in the Cochrane review caused headache, nausea and higher blood pressure.

Who it applies to: Anyone relying on stimulants.

Try instead: Use naps, light and moderate, early caffeine instead; ask a doctor if you cannot stay awake safely.

8,11

Dark sunglasses when driving yourself home

Low certainty

Why: They can reduce the alerting effect of light and make drowsy driving more likely.

Who it applies to: Night workers who drive.

Try instead: Wear them only if someone else is driving.

5

Unsupported claims

You can fully adapt to nights if you just stick with it

Moderate certainty

Why: Studies show most night workers do not fully adapt, particularly if they return to day schedules on days off.

Who it applies to: Permanent night workers.

Try instead: Aim for a compromise schedule with an anchor block.

1,12

Melatonin solves shift work insomnia

Low certainty

Why: The Cochrane review found a modest 24 minute gain in daytime sleep from low-quality trials.

Who it applies to: Anyone buying melatonin online.

Try instead: Use it, if at all, after advice and together with light, dark and schedule steps.

8

Common mistakes

Switching back to a full day schedule on days off

Moderate certainty

Why: It repeats the circadian shift each week, like jet lag.

Who it applies to: Permanent night workers.

Try instead: Keep an anchor block; see Build a Healthy Sleep Schedule.

1

Ignoring persistent sleepiness

Moderate certainty

Why: The Detroit survey found shift work sleep disorder in about 10 percent and linked it to accidents and depression.

Who it applies to: Anyone with long-lasting trouble.

Try instead: Keep a sleep diary and see a clinician.

4

Evidence & safety

What the research shows

Agencies and sleep medicine guidance agree on planned sleep schedules, naps, controlled light and dark and sensible caffeine timing. The trials behind these are small and mostly low or very low quality: a Cochrane review of non-drug interventions found results inconclusive, a Cochrane review of drug trials found low-quality evidence for melatonin, and caffeine has data mainly from simulated work. There is good observational evidence that post-night-shift driving is risky.

Limits of the evidence

  • Many trials are small, short and in laboratories or healthy volunteers.
  • No trials measured injury or workplace safety outcomes for naps or caffeine.
  • Prevalence figures come from one US metropolitan survey.

Precautions and interactions

  • Check supplements and caffeine products with a pharmacist if you take any medicine, are pregnant or breastfeeding, or have a heart, mood or sleep condition.

Life-stage considerations

  • Pregnancy and breastfeeding: avoid melatonin and herbal sleep products unless a clinician advises; keep caffeine moderate and talk to your midwife or doctor about shift patterns.
  • Older workers: sleep is lighter and recovery slower; most trials involved younger people.

Warning signs

  • Falling asleep at work or while driving.
  • Loud snoring, gasping or breathing pauses.
  • Persistent low mood or anxiety.
  • Using alcohol or sleep aids most days to cope.

Claim checks

Melatonin fixes shift work insomnia

Low certainty

A Cochrane review found about 24 more minutes of daytime sleep (low quality). Helpful for some, modest overall.

8,13

Napping at work is bad

Low certainty

A systematic review found planned naps usually reduced sleepiness, with brief grogginess after waking; safety outcomes were not studied.

9

Sunglasses on the drive home are always a good idea

Low certainty

NIOSH says sunglasses can reduce alertness and advises wearing them only when someone else is driving.

5

You can get used to night work

Moderate certainty

Most night workers do not fully adapt, particularly if they revert on days off; compromise schedules are preferred.

1,12

Questions people ask

What is an anchor sleep?

It is a block of sleep kept at about the same clock time every day, including days off, while the rest of your sleep flexes around the rota. NIOSH training for nurses describes a compromise schedule with a shared block such as 8 a.m. to noon.

How long should a nap be on a night shift?

Studies used short naps, and reviews note brief grogginess after waking. NHS trust guides suggest keeping naps short (about 15 to 20 minutes, and no longer than 45), with time to wake fully before safety tasks. Check what your employer allows.

Is melatonin safe for shift workers?

Trials of 1 to 10 mg after night shifts reported modest gains in daytime sleep, but long-term safety has not been established and products vary. Check with a pharmacist or doctor first.

When should I stop caffeine on a night shift?

Take it early or in the middle of the shift and stop several hours before your planned sleep. NHLBI suggests avoiding caffeine for about six hours or more before bed.

Should I wear sunglasses on the way home?

NIOSH notes they can block the alerting effect of light and advises wearing them only if someone else drives you home.

Is it safe to drive after a night shift?

A study of 33 nurses found sleepiness and hazardous driving events were highest after night shifts even on short commutes. Nap first, share a ride or use other transport if drowsy.

What is shift work sleep disorder?

It is persistent insomnia or excessive sleepiness linked to night or rotating work. In the Detroit survey, about 10 percent of night and rotating workers met the criteria.

Can I stay on a night schedule on days off?

Staying fully on nights keeps the clock aligned but can be hard socially. Many choose a compromise: sleep at the same anchor time and move the rest a few hours.

Do blackout curtains really matter?

Light and noise are the main enemies of daytime sleep, and health agencies list a dark, quiet, cool bedroom as a core habit.

When should I see a doctor?

If sleepiness or insomnia lasts a month or more, you nod off at work or driving, or you have loud snoring, gasping, low mood or worry.

References

  1. CDC/NIOSH. Training for Nurses on Shift Work and Long Work Hours, Module 9: Coping with the Night and Evening Shifts, Sleep (Continued). Last reviewed March 31, 2020. Read 2026-10-31. source
  2. Slanger TE et al. Person-directed, non-pharmacological interventions for sleepiness at work and sleep disturbances caused by shift work. Cochrane Database Syst Rev. 2016. PMID 27549931. source
  3. Mulhall MD et al. Sleepiness and driving events in shift workers: the impact of circadian and homeostatic factors. Sleep. 2019. PMID 30882154. source
  4. Drake CL et al. Shift work sleep disorder: prevalence and consequences beyond that of symptomatic day workers. Sleep. 2004. PMID 15683134. source
  5. CDC/NIOSH. Training for Nurses on Shift Work and Long Work Hours, Module 9: Coping with the Night and Evening Shifts, Light. Read 2026-10-31. source
  6. NHLBI. Healthy Sleep Habits (last updated March 24, 2022). Read 2026-10-31. source
  7. Morgenthaler TI et al. Practice parameters for the clinical evaluation and treatment of circadian rhythm sleep disorders. An AASM report. Sleep. 2007. PMID 18041479. source
  8. Liira J et al. Pharmacological interventions for sleepiness and sleep disturbances caused by shift work. Cochrane Database Syst Rev. 2014. PMID 25113164. source
  9. Ruggiero JS, Redeker NS. Effects of napping on sleepiness and sleep-related performance deficits in night-shift workers: a systematic review. Biol Res Nurs. 2014. PMID 23411360. source
  10. Schweitzer PK et al. Laboratory and field studies of naps and caffeine as practical countermeasures for sleep-wake problems associated with night work. Sleep. 2006. PMID 16453980. source
  11. Ker K et al. Caffeine for the prevention of injuries and errors in shift workers. Cochrane Database Syst Rev. 2010. PMID 20464765. source
  12. Smith MR, Fogg LF, Eastman CI. Practical interventions to promote circadian adaptation to permanent night shift work: study 4. J Biol Rhythms. 2009. PMID 19346453. source
  13. Carriedo-Diez B et al. The effects of the exogenous melatonin on shift work sleep disorder in health personnel: a systematic review. Int J Environ Res Public Health. 2022. PMID 36011832. source

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