What Medication Can Interact With Melatonin
Its important to know how other medicines may interact with melatonin. As a general rule of thumb, consult your doctor before taking any new herbs or supplements.
Melatonin can reduce the effectiveness of some prescription drugs, triggering possibly serious complications.
For example, you shouldnt combine an anticoagulant or blood thinner medication with melatonin. Melatonin can increase the risk of bleeding.
Melatonin may also increase blood pressure in people who take medication to control their hypertension.
Other drugs that may interact with melatonin include:
- Anticonvulsants
- Selective serotonin reuptake inhibitors
Also dont take melatonin if youve been diagnosed with an autoimmune disease, like lupus.
Autoimmune diseases are the result of an overactive immune system, and inflammation is a classic symptom on these diseases. Melatonin can stimulate immune system activity, increasing inflammation and exacerbating an existing disease.
How Much Melatonin Does Your Body Produce Naturally
The production of melatonin signals your body that its nighttime, allowing you to relax and lowering your body temperature. This helps you transition to sleep easier and promote consistent, quality sleep.4 Most people produce adequate melatonin to sleep on their own, with levels increasing at night and then diminishing in the morning, which is when the hormone cortisol increases, that promote wakefulness. The amount of melatonin the body actually produces varies throughout your lifetime, with levels increasing and decreasing during various life stages.5 Further, the aging process, diet, and stress can all disrupt the bodys normal production of melatonin, which may make quality sleep more difficult.
What’s The Recommended Dose Of Melatonin
There is no official guideline for melatonin dosage. In general, experts suggest you start at the lowest available amount and gradually increase it until you get restful sleep.
Some experts calculate melatonin dosage by weight. For every kilogram you weigh, you can take 0.04 mg to 0.08 mg of melatonin a day. So, for example:
- An adult who weighs 155 pounds can take 3 mg to 6 mg of melatonin.
- A 6-year-old child who weighs 41 pounds can take 0.75 mg to 1.5 mg of melatonin.
Another way to calculate dosage that you may find more practical is to follow the recommended ranges for each age group:
- Children: 0.5 mg to 5 mg
- Adults: 0.5 mg to 10 mg
- Older adults: 0.1 mg to 5 mg
Note that these ranges are for short-term use only. Depending on the supplement you’re taking, “short-term” could mean anywhere from 5 days to 13 weeks. There is little research on what doses are safe to use long-term, so you may want to avoid taking supplements past the period recommended by your healthcare provider.
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When Should I Take Melatonin
Melatonin may be used to improve sleep onset, sleep time, or sleep quality. There are several scenarios where you might benefit from taking melatonin for sleep, according to theNational Center for Complementary and Integrative Health . These include:
- Experiencing jet lag during or after a long flight or after traveling through different time zones
- Performing shift work that disrupts your sleep cycle
- Having temporary instances of anxiety related to events in your life
- Experiencing the occasional sleepless night
- Being diagnosed with delayed sleep-wake phase disorder
Some healthcare professionals also recommend that children who experience difficulty sleeping due to other health conditions, like autism spectrum disorder and attention deficit hyperactivity disorder, take melatoninalthough experts are still unsure about the overall safety and effectiveness of this approach. The American Academy of Pediatrics reminds parents to always discuss supplement use with their childs pediatrician, especially since melatonin is a hormone and may affect the growth and development of a child who has not fully matured.
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Why You Shouldnt Combine Melatonin And Alcohol
Even though alcohol is a sedative that can make you feel sleepy after a few drinks, its known to reduce the amount of melatonin that your body can create. This can interrupt your sleep cycle. Alcohol can also cause some of the muscles around your airways to work differently and affect your breathing. This can make it hard to sleep if you have a breathing issue, such as sleep apnea.
Because combining alcohol and melatonin can cause negative side effects to your health, its not recommended. Some of these side effects can be disruptive or potentially dangerous, such as:
- drowsiness, which can make it much harder for you to drive or focus on certain tasks
- dizziness, which can make driving or even walking around dangerous
- increased anxiety, which can make you feel irritable or raise your blood pressure
Combining melatonin and alcohol can affect your livers ability to create certain enzymes. The following complications may also result:
- flushing in your face and upper body
- swelling in your feet and ankles
- an abnormally fast heartbeat
See your doctor if you experience any of these side effects.
If youve been having insomnia or sleeping inconsistently, talk to your doctor before taking melatonin supplements as a sleep aid. Your doctor may decide that melatonin isnt the best solution for your sleeping issues. In the case that you have a sleep disorder, other medications or treatments may be more effective in helping you sleep better at night.
Q: How Much Melatonin Should I Take To Help Me Sleep
A: Taking the sleep hormone melatonin is recommended to help induce sleep, but there is a good deal of confusion about how much to take. It is sold over the counter in a range of doses, from 1 mg to 10 mg and higher. The natural inclination is to take more melatonin if it is not effective in helping you sleep better, but this is not a good idea.
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The hormone serotonin is produced during the day and this changes to melatonin when it gets dark outside. Peak levels of melatonin are produced before 3 a.m., when it sharply decreases before natural daylight returns.
Research has found that taking melatonin in low doses is the most effective way to promote sleep if you are experiencing restlessness or insomnia. Recommended doses of melatonin are from 0.5 mg up to 3 mg, which are adequate to promote sleep or treat jet lag.
When melatonin is used at higher doses, it tends to increase daytime sleepiness. Other side effects of too much melatonin can include reduced focus and concentration, feeling chilled and higher prolactin levels.
If you find yourself taking higher doses of melatonin, you can decrease the dose by cutting your tablet in half or in quarters. Research indicates there are no side effects if you reduce the dose of melatonin you are taking.
Behavioral Health Nurse Practitioner Ann Pressler, CNP
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Those Who Are Pregnant Or Breastfeeding
There is not enough information available on the side effects of melatonin supplements to determine if pregnant or breastfeeding people can safely take these supplements. Those who are pregnant or trying to become pregnant should avoid melatonin supplements unless directed by their physician. If you are struggling with sleep, ask your doctor for other ways to improve sleep during pregnancy.
How Do Melatonin Supplements Work
The pineal gland in the brain is responsible for natural melatonin production in the body. It doesnt make you sleepy, but as melatonin levels rise in the evening, it puts you into a state of quiet wakefulness that helps promote sleep, explains Johns Hopkins sleep expert Luis F. Buenaver, Ph.D., C.B.S.M.
Taking melatonin can help with a range of sleep problems such as:
- Primary sleep disorders like insomnia
- Delayed sleep-wake disorder
- Sleep problems in children with autism spectrum disorder or attention deficit hyperactivity disorder
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How Melatonin Affects Sleep
Melatonin makes a person feel sleepy through its effect on circadian rhythms, which are the near 24-hour cycles that affect every cell in the human body. One important circadian rhythm is the sleep-wake cycle, which affects when people fall asleep and when they wake up.
While the human brain naturally makes melatonin, supplements are also available in the U.S. over-the-counter. In some countries, melatonin supplements are only available with a prescription.
Can Melatonin Help With Insomnia
People with insomnia have trouble falling asleep, staying asleep, or both. When symptoms last a month or longer, itâs called chronic insomnia.
According to practice guidelines from the American Academy of Sleep Medicine and the American College of Physicians , thereâs not enough strong evidence on the effectiveness or safety of melatonin supplementation for chronic insomnia to recommend its use. The American College of Physicians guidelines strongly recommend the use of cognitive behavioral therapy for insomnia as an initial treatment for insomnia.
Melatonin is a common dietary supplement that has gained widespread popularity around the globe.
Though renowned as a natural sleep aid, it also has powerful effects on other aspects of your health.
This article reviews the benefits and potential side effects of melatonin, as well as its best dosage.
Its primarily responsible for regulating your bodys circadian rhythm to manage your natural sleep cycle .
Therefore, its often used as a sleep aid to combat issues like insomnia.
Its widely available in the US as an over-the-counter medication but requires a prescription in other parts of the world, such as Europe and Australia.
In addition to improving sleep, melatonin is also involved in managing immune function, blood pressure and cortisol levels .
Plus, it acts as an antioxidant, with some research finding that it can significantly affect many health conditions.
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Is It Safe To Take Melatonin With Alcohol
Alcohol can disrupt your natural melatonin levels, so experts recommend against taking melatonin when drinking or when using other sleep medications.
There is limited evidence that melatonin might be helpful in recovering from alcohol use disorders due to the antioxidant effects of melatonin. However, more research needs to be done.
Other Tips For Better Sleep

Using melatonin can help promote a range of support for your sleep behavior and habits. However, when used by itself, its not as effective as when its used with other nighttime behaviors. Here are a few other tips for better sleep that you can incorporate into your daily routine to see maximum results.
First, establish a nighttime routine. This can help your body wind down after a long day of work and responsibilities and get prepared for bed. Think of whatever activities help you relax. Maybe you think of taking a bath, or maybe you think of relaxing yoga or simply performing your skin care routine and changing into your pajamas. Find whatever relaxing activities help you wind down and establish a routine to get your mind and body ready for bed.
Its common for stress and anxiety to keep us up at night as well. When left unaddressed, stress can turn into worrisome thoughts that can be distracting and race through your head as youre trying to fall asleep. So, decompressing and relieving stress before bed is a must. Journaling, yoga, exercise, and meditation are all great ways to help relieve stress.
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When To Worry And Seek Medical Assistance
You probably dont need to see a doctor for a minor overdose that causes a mild headache, nausea, or drowsiness. These symptoms may improve once you stop taking the supplement or reduce the amount you take each night.
In the case of a severe overdose or side effect like an abnormally low blood pressure see a doctor right away. You should also get medical help if you feel that the supplement interacts with your prescription medication. For example, you might take your diabetes medication as scheduled to control your blood sugar, yet your blood sugar still remains elevated.
Medical treatment will focus on stabilizing your health. So if too much melatonin causes low blood pressure, your doctor will work to get your blood pressure back to a healthy level.
To avoid complications, talk to your doctor to see whether melatonin is safe for you. If so, get dosing recommendations from your doctor to avoid problems in the future.
How And When To Take It
The dose will vary depending on why you’re taking it. Follow the instructions that come with your medicine if you’re taking melatonin to:
- prevent headaches
If your child is prescribed melatonin, follow the doctor’s instructions carefully. Find out more about giving melatonin to children from Medicines for Children.
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Moving Your Sleep Schedule
Melatonin can also help to reset your sleep schedule, shifting your circadian rhythm to a time that fits your life better. For example, if youâre a natural night owl, but you have to be up early for work, you may want to start waking up and going to sleep earlier. Taking melatonin about 4 to 8 hours before the DLMO will bring your circadian rhythm forward, making it easier to fall asleep earlier.
When trying to shift your sleep schedule, research suggests 1 mg may be enough to be effective. You can make this even more effective by combining melatonin supplements with natural light exposure in the morning.
Does Melatonin Help With Cancer Symptoms
Studies of the effect of melatonin supplements on cancer symptoms or treatment-related side effects have been small and have had mixed results.
Keep in mind that unproven products should not be used to replace or delay conventional medical treatment for cancer. Also, some products can interfere with standard cancer treatments or have special risks for people whoâve been diagnosed with cancer. Before using any complementary health approach, including melatonin, people whoâve been diagnosed with cancer should talk with their health care providers to make sure that all aspects of their care work together.
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How Much Melatonin Can Children Take
Few studies look at the use of melatonin in healthy children, including research into appropriate dose levels, so its challenging to come up with an exact amount. If youre concerned about your child or infants sleep habits, its best to speak with your pediatrician before attempting any at-home dosing.
Some kids, such as children with immune disorders or those taking immunosuppressants, should not take melatonin at all. While melatonin is generally well-tolerated in adults, further studies are needed to confirm its safety and efficacy in children.
Anatomical and physiological differences give rise to differences in the bodily absorption, distribution, metabolism, and excretion of drugs in children compared with adults. Many medicines, including melatonin, have only been tested for safety and efficacy in adults.
Can You Take It Every Night
You can take liposomal melatonin every night, but only for the short term. That isnt because taking this supplement daily for the long-term might expose you to any side effects. Its only because there isnt much information available about its long-term safety.
However, if you want to be on the safe side, you might want to consult with your healthcare provider. That is especially true if youre thinking of giving melatonin to children, which should only be done after you have consulted your pediatrician.
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Consider Melatonin Sleep Help For Occasional Insomnia
Even sound sleepers have trouble falling asleep or staying asleep once in a while, Buenaver says. You may want to try melatonin for sleep if you have difficulty for more than a night or two. Research shows that a supplement may help people with insomnia fall asleep slightly faster and may have bigger benefits for those with delayed sleep phase syndromefalling asleep very late and waking up late the next day.
Is Melatonin Safe Forchildren

Its no wonder parents are uncertain about this. If you surfthe web, youre likely to get mixed messages:
- Australian experts called the increase in use among children alarming and warned in 2015 that parents shouldnt give it to their children. WebMD
- Melatonin, according to more than 24 studies, is safe for children and has been used with little to no side effects. NaturalSleep.org
- Currently, we dont have any evidence to say that taking melatonin on a daily basis in that sense is harmful, although there are no large-scale multicenter clinical trials to really test that.Medscape
This last quote is probably closest to where we actuallyare. However, it is clear there has been a dramatic increase in use ofmelatonin in children in the past five years or so. For example, in England, estimates have found a 25percent increase in melatonin prescriptions in children under 18 between2015-16 and 2017-18, and a 40 percent increase in the extended release formsduring the same period. There are no similar statistics in the U.S. forover-the-counter melatonin, but it is now rare in our experience that childrencoming to the Boston Childrens Sleep Clinic with insomnia are not already onmelatonin, usually recommended by their pediatrician.
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