Learn the best OTC remedies for jet lag and shift lag, including melatonin, caffeine, light exposure, sleep strategies, safety tips, and more.
The Best Remedies for Jet Lag and Shift Lag
A long flight can leave you exhausted at noon but awake at midnight. Night shifts can create a similar problem, even if you never leave your time zone.
Both jet lag and shift lag stem from the same problem: your sleep-wake schedule no longer aligns with your body’s internal clock.
As a result, you may experience daytime fatigue, brain fog, sleep problems, irritability, and inability to concentrate when you have to stay alert and functioning.
Some products may help with different symptoms, but options are limited. Often, product timing, light exposure, sleep schedule, and caffeine matter more than which supplement you choose.
This guide covers the most common OTC remedies for jet lag and shift lag, showing what products people think are most effective and what the evidence shows. It will also discuss which products may actually cause the most harm.
Medical disclaimer: This article is for general education and is not medical advice. OTC medicines and dietary supplements can interact with medications and may not be appropriate for everyone. Ask a healthcare professional or pharmacist before using a new sleep aid or supplement, particularly if you are pregnant, breastfeeding, older, have a chronic condition, take prescription medicines, or regularly work night shifts.
Crossing time zones quickly disrupts your chronobiology (internal body clock). This creates jet lag.
Jet lag is when you arrive somewhere, and it’s 10 PM locally, but your body responds as if it is much earlier.
Shift lag happens with a repeated work schedule that doesn’t align with a normal sleep-wake rhythm. This can happen to night workers. They have to sleep when everybody else is awake, and vice versa.
Both involve disrupted circadian rhythms, but they differ in key ways.
Common symptoms include brain fog and irritability. You may also experience low energy, poor concentration, daytime sleepiness, frequent wake-ups, difficulty falling asleep, poor sleep quality, and stomach discomfort.
The Best Remedies for Jet Lag and Shift Lag
Jet lag symptoms typically go away once you adjust to the new time zone.
Shift-related sleep issues tend to stick around longer because rapidly changing schedules leave less time for sleep.
How Disruption of the Circadian Rhythm Can Cause Exhaustion
Your circadian rhythm is your body’s internal timing system that regulates your activities in 24-hour cycles.
It regulates sleep and wakefulness cycles, your body’s temperature and metabolism, and many other biological processes.
Light is one of the more dominant external signals.
An abrupt change in your schedule does not always immediately change your internal clock.
Thus, you can feel exhausted even after lying in bed for several hours, or, on the contrary, be wide awake when you want to sleep the most.
One hormone involved in this cycle is melatonin. The brain produces more melatonin in the dark, signaling biological nighttime. Light suppresses melatonin production.
For this reason, suppression of melatonin cannot cure jet lag, for example.
The timing of your light and dark, sleep and wake, activity and meals, and caffeine and other stimulants send signals to your body clock.
The 7 Best Over-the-Counter Remedies for Jet Lag and Shift Lag
The Best Remedies for Jet Lag and Shift Lag
The word “best” needs some context.
These are seven commonly used OTC options or strategies, but the evidence supporting them varies. Some have more support than others, while a few are better considered optional approaches than proven treatments.
1. Melatonin: The Most Relevant OTC Option for Body-Clock Timing
Melatonin is the most extensively studied supplement for jet lag.
As a hormone the body produces, it helps regulate circadian timing. Studies suggest melatonin may help people manage jet lag if taken at certain times during travel.
The CDC also notes that timed melatonin can help travelers manage time zone differences.
What About Melatonin for Shift Workers?
Here, the evidence is less clear.
The 2025 American Academy of Sleep Medicine guideline suggests melatonin for shift workers with certain sleep problems. It also suggests melatonin for people transitioning from daytime to nighttime sleep. However, the certainty of this evidence was low or very low.
Melatonin at the Appropriate Time
Melatonin is not a “sleep pill” to take whenever it suits you.
Take it at the right time to help shift your circadian rhythm.
The CDC says you should adjust melatonin timing based on your travel direction and the change you want in your body clock.
Therefore, we don’t specify a universal melatonin dose or schedule in this article. Melatonin timing depends on whether you are traveling east or west, your sleep schedule, other medicines, and your health.
Safety
It is safe for most adults to take melatonin for a while, but we cannot say it is safe for everyone to take it long-term.
It can cause sleepiness and side effects like headache, dizziness, and nausea. Melatonin can also interact with other medicines. People who take blood thinners and some medicines for epilepsy should avoid taking melatonin.
One more concern is the quality of melatonin supplements. Dietary supplements are not controlled or regulated.
2. Magnesium: Popular for Relaxation, but Evidence Is Limited
Magnesium is frequently marketed as a natural sleep and recovery supplement.
It plays important roles in normal muscle and nerve function, but that doesn’t mean taking extra magnesium automatically improves sleep.
NCCIH reports that research on magnesium for insomnia is limited and conflicting. Some studies suggest possible benefits, but the evidence isn’t strong enough to draw firm conclusions.
Magnesium Glycinate vs. Citrate
You may see different forms marketed for different purposes.
Magnesium glycinate is often promoted for relaxation, while magnesium citrate is commonly used because it can have a laxative effect.
However, strong evidence does not show that one form is universally superior for jet lag or shift lag.
What About Cortisol?
Claims that magnesium reliably “controls cortisol” and therefore fixes shift-work sleep problems are too strong.
Shift work can affect stress and hormone patterns, but magnesium should not be presented as a proven cortisol-reset treatment.
Bottom line: Magnesium may help people who need it nutritionally, but evidence for using it specifically as a jet-lag or shift-lag remedy is limited.
L-theanine and GABA are sometimes marketed as supplements for relaxation and sleep.
They may sound appealing when travel or night work leaves you feeling tense and overstimulated.
However, that is different from proving that they reset the circadian rhythm.
Strong evidence is not sufficient to rank either supplement alongside melatonin for treating jet lag or shift work disorder.
Should You Combine Them With Melatonin?
Be cautious about combining multiple products that are marketed for relaxation or sleep.
Adding several supplements doesn’t necessarily improve sleep and can make it harder to tell what is helping or causing unwanted effects.
If you take prescription medicines or other supplements, ask a pharmacist or healthcare professional about potential interactions.
Bottom line: L-theanine and GABA may be marketed for calming effects, but they should not be treated as established treatments for circadian rhythm disruption.
Valerian and chamomile are popular herbal sleep remedies.
A warm cup of chamomile tea may also become part of a relaxing bedtime routine.
But the evidence is much weaker than many advertisements suggest.
NCCIH reports very little evidence that chamomile or valerian effectively treats insomnia. Valerian research is inconsistent, and the American Academy of Sleep Medicine previously recommended against using valerian for chronic insomnia.
Additionally, some people may experience adverse reactions to chamomile.
Where They May Still Fit
Rather than thinking of these herbs as circadian “reset buttons,” consider them optional parts of a relaxing bedtime routine if they are safe for you.
For example:
Dim the lights.
Put away stimulating screens.
Take a warm shower.
Drink a non-caffeinated beverage.
Practice slow breathing.
Keep your bedroom cool and dark.
The routine itself may be more important than the herb.
Bottom line: Valerian and chamomile are popular, but evidence for treating jet lag or insomnia is limited.
5. Antihistamines: Common OTC Sleep Aids That Need Caution
Some people use sedating antihistamines such as diphenhydramine or doxylamine when jet lag makes it difficult to sleep.
They can cause drowsiness, but that does not mean they are ideal tools for resetting your body clock.
Potential problems include:
Next-day grogginess
Reduced alertness
Cognitive impairment
Dry mouth
Dizziness
Reduced physical performance
The CDC specifically cautions against antihistamines for jet lag because they can worsen cognitive impairment and other unwanted effects.
This matters even more for people who must drive, operate equipment, care for others, or perform safety-sensitive work after sleeping.
Bottom line: These medicines may make you sleepy, but they don’t reset your circadian rhythm and shouldn’t be a first-choice long-term strategy for jet lag or shift work.
6. Caffeine and Electrolytes: Useful for Alertness, Not for Resetting the Clock
Caffeine is one of the most practical tools for temporary alertness.
For travelers and night workers, strategic caffeine use may help reduce sleepiness when you need to stay awake.
But caffeine does not replace sleep.
It can also interfere with later sleep if used too close to bedtime.
The CDC recommends paying attention to caffeine timing during jet-lag recovery and avoiding it sufficiently far before the intended sleep period.
What About Electrolytes?
Travel can contribute to dehydration, particularly with long flights, heat, alcohol consumption, or inadequate fluid intake.
Staying well hydrated is sensible, and the CDC notes that dehydration can worsen jet lag symptoms.
But electrolyte drinks shouldn’t be promoted as a way to reset your circadian rhythm or dramatically speed up jet-lag recovery.
Water and a balanced diet are often sufficient unless there is a specific reason to replace electrolytes.
Bottom line: Caffeine can temporarily improve alertness, while hydration supports normal recovery. Neither replaces sleep or resets the body clock on its own.
7. 5-HTP: An Option to Approach With Extra Caution
5-HTP is a supplement that can be converted into serotonin and is sometimes marketed for mood and sleep.
It is also sometimes promoted as a way to support melatonin production.
The problem is that evidence for using 5-HTP specifically for jet lag or shift lag is limited.
NCCIH notes that there is very limited evidence regarding 5-HTP for insomnia.
There are also potential medication interactions, particularly because serotonin-related supplements can interact with medicines that affect serotonin.
For that reason, 5-HTP should not be casually combined with antidepressants or other medicines without professional advice.
Bottom line: 5-HTP is not a first-line OTC remedy for jet lag or shift lag.
Jet Lag and Shift Lag: Key Differences
The Best Remedies for Jet Lag and Shift Lag
Feature
Jet Lag
Shift Lag
Trigger
Rapid time zone change
Irregular or overnight work hours
Duration
Temporary (days)
Chronic (months/years)
Recovery
Natural realignment
Needs routine management
Risk Group
Travelers
Shift workers
How to Use OTC Remedies With Light and Sleep Hygiene
Supplements are only one piece of the puzzle.
In many cases, light exposure and sleep timing are more important for circadian adjustment.
Use Light Strategically
Light is one of the strongest signals influencing the circadian clock.
The timing matters.
Morning light tends to shift the body clock earlier, while appropriately timed evening light can shift it later. The ideal schedule depends on your travel direction and the sleep schedule you are trying to establish.
Shift workers also need to time light exposure carefully around work and sleep.
Do not assume that “more bright light” is always better.
Don’t assume you need a supplement just because you are traveling.
After Arrival
Try to follow the local schedule.
Get appropriately timed daylight.
Protect your sleep period.
If melatonin is appropriate for you, discuss its timing with a healthcare professional or follow reliable travel guidance rather than taking it randomly.
Sample Recovery Protocol for Shift Lag
The Best Remedies for Jet Lag and Shift Lag
Night workers have a different challenge because the schedule may repeat.
Before a Night Shift
Aim to arrive at work reasonably rested.
A planned nap can increase total sleep and reduce fatigue.
Use caffeine strategically rather than continuously.
After the Night Shift
If you are sleepy, prioritize getting home safely.
Then create a dark, quiet, cool sleep environment.
Avoid unnecessary bright light if you are preparing for daytime sleep.
If you’re considering melatonin for daytime sleep, discuss appropriate timing with a healthcare professional. The AASM conditionally recommends melatonin for certain adults with shift work disorder who experience daytime sleep disturbance after night shifts.
On Days Off
Avoid constantly flipping between completely different schedules if doing so leaves you feeling like you are experiencing perpetual jet lag.
A consistent sleep pattern—or a carefully planned compromise schedule—may be easier for some permanent night workers.
Rotating workers may need a different approach because their schedules change.
No special food can instantly reset your circadian rhythm.
Still, nutrition can support general energy and recovery.
Include Balanced Meals
Aim for a mixture of:
Protein
Fiber-rich carbohydrates
Vegetables
Fruits
Healthy fats
Adequate fluids
What About Tryptophan?
Tryptophan is an amino acid involved in pathways that produce serotonin and melatonin.
Foods containing tryptophan can be part of a healthy diet, but eating a particular food is not a proven way to immediately reset jet lag.
What About Vitamin B12 and Vitamin D?
Both nutrients are important for normal health.
However, taking extra B12 or vitamin D does not automatically improve circadian rhythm or energy if you are not deficient.
If persistent fatigue is a concern, identifying the underlying cause is more useful than randomly adding supplements.
What to Avoid With OTC Remedies
Taking Melatonin at a Random Time
Timing matters.
Taking melatonin without considering your destination, sleep schedule, and body-clock timing may reduce its usefulness or potentially shift your clock in an unwanted direction.
Using Sleep Aids Instead of Fixing the Schedule
A sedating product may make you sleepy without correcting the underlying circadian problem.
Your sleep environment, light exposure, and schedule still matter.
Combining Multiple Sedating Products
Avoid casually stacking antihistamines, melatonin, herbal products, alcohol, or other sedating substances.
More sedation does not necessarily mean better-quality sleep.
It may instead increase grogginess and safety risks.
Using Caffeine Too Late
Caffeine can help you stay awake but may make it harder to sleep later.
This can create a cycle:
Fatigue → caffeine → poor sleep → more fatigue → more caffeine.
Use it strategically, not as a sleep replacement.
Driving While Sleepy
This is one of the most important safety issues.
If you are extremely sleepy after a flight or night shift, do not assume that caffeine or an OTC sleep product will make driving safe.
Find a safer way to travel or rest until you are alert enough to drive.
When Should You See a Doctor Instead?
Occasional jet lag is normal.
Persistent sleep problems are different.
Speak with a healthcare professional if you regularly experience:
Severe daytime sleepiness
Difficulty sleeping despite adequate opportunity
Persistent insomnia
Problems staying awake at work
Repeated near-misses or safety problems
Symptoms that continue even when your schedule stabilizes
Significant mood changes
Sleep problems that interfere with daily life
These symptoms may indicate shift work disorder or another sleep condition, not ordinary shift lag.
The AASM defines shift work disorder as a circadian rhythm sleep-wake disorder associated with a work schedule that overlaps with the usual sleep period and produces symptoms such as insomnia or excessive sleepiness. Its 2025 guideline emphasizes that treatment recommendations are conditional and that evidence varies by intervention.
A healthcare professional can also determine whether another issue—such as sleep apnea, medication effects, anemia, thyroid problems, depression, or another sleep disorder—could be contributing to persistent fatigue.
How Long Is Too Long to Rely on Sleep Aids?
No single number of days applies to every OTC sleep product.
The bigger question is why you still need the sleep aid.
If a short trip caused temporary jet lag, the problem should generally improve as your circadian rhythm adjusts.
If you repeatedly need sedating products to sleep after every night shift, it is worth addressing the underlying schedule and discussing the problem with a healthcare professional.
Long-term self-treatment can hide an underlying sleep disorder and may expose you to unnecessary side effects.
FAQs About the Best Remedies for Jet Lag and Shift Lag
Q. What is the fastest OTC remedy for jet lag?
There is no universal instant remedy.
Among supplements, melatonin has some of the strongest evidence for reducing jet lag symptoms, but timing is critical. Strategic light exposure, appropriate sleep timing, hydration, and careful caffeine use are also important.
Q. Can I take melatonin every day for shift work?
Some evidence supports melatonin for certain shift workers with daytime sleep problems, and the AASM conditionally recommends it in specific circumstances. However, the evidence is not strong enough to say that everyone who works nights should take melatonin every day.
If you work regular night shifts and repeatedly need melatonin to sleep, discuss your situation with a healthcare professional.
Q. Is magnesium good for jet lag?
Magnesium may help some people, but evidence that it specifically treats jet lag is limited. Research on magnesium for insomnia is also mixed.
Q. Are antihistamines good for jet lag?
They can cause sleepiness, but they do not reset the circadian rhythm and may impair you the next day. The CDC advises caution with antihistamines for jet lag because of concerns about cognitive and physical performance.
Q. Does caffeine help shift workers?
Caffeine can temporarily improve alertness, but it does not replace sleep. Using it too close to your intended sleep period can make recovery harder.
Q. Can supplements completely reset my body clock?
No.
Circadian adjustment depends on multiple signals, especially light, sleep timing, activity, and environmental cues. Supplements may support certain parts of the process, but they cannot replace adequate sleep and appropriate scheduling.
The Bottom Line
The best over-the-counter remedies for jet lag and shift lag are not necessarily the products with the biggest marketing claims.
Melatonin has the most relevant evidence among the supplements discussed here, particularly for jet lag and certain shift-work sleep problems.
Magnesium, valerian, chamomile, L-theanine, GABA, and 5-HTP have much less convincing evidence for directly correcting circadian disruption. Sedating antihistamines can cause sleepiness but may also create unwanted impairment.
The bigger picture matters:
Light + sleep timing + a good sleep environment + strategic caffeine + appropriate hydration + careful supplement use is generally a more sensible approach than relying on one OTC product.
And if fatigue or insomnia continues, especially with regular night work, don’t keep adding supplements. Talk with a healthcare professional about whether shift work sleep disorder or another sleep problem could be involved.
