Can I take melatonin every night?
Mia Kelly
Published Jan 11, 2026
If melatonin does seem to help, it's safe for most people to take nightly for one to two months. “After that, stop and see how your sleep is,” he suggests. “Be sure you're also relaxing before bed, keeping the lights low and sleeping in a cool, dark, comfortable bedroom for optimal results.”
What happens if you take melatonin every day?
Taking the recommended dose of melatonin may increase your blood melatonin levels up to 20 times more than normal and give you side effects that include: Excessive sleepiness. Headache. Dizziness.
How many days in a row can you take melatonin?
You can use melatonin for up to 5 nights in a row.
What are the side effects of taking melatonin every night?
The side effects of melatonin can include:
- feeling drowsy or sleepy.
- headache.
- dizziness.
- nausea.
- increased urination or bedwetting (children)
Is it OK to take 5mg of melatonin every night?
What is a safe melatonin dose? According to Michael Grandner, director of the Sleep and Health Research Program at the University of Arizona, “melatonin is very safe if taken in normal doses,” which is anything between 0.5 mg and 5 mg.
19 related questions foundHow do I stop taking melatonin every night?
Prepare Yourself for Sleep: Avoid big meals, caffeine, and alcohol in the evening; and try to fit in some physical activity during the day. Also, try to take advantage of the light. Expose yourself to the sunlight in the morning and avoid it in the evening, to help in keeping your circadian rhythms in sync.
Can melatonin be harmful?
Melatonin is generally safe for short-term use. Unlike with many sleep medications, with melatonin you are unlikely to become dependent, have a diminished response after repeated use (habituation), or experience a hangover effect. The most common melatonin side effects include: Headache.
Can you take melatonin long-term?
Melatonin is possibly safe when taken long-term. It's been used safely for up to 2 years. But it can cause some side effects including headache, sleepiness, dizziness, and nausea. Don't drive or use machinery for 4-5 hours after taking melatonin.
Who should not take melatonin?
Because melatonin can cause daytime drowsiness, don't drive or use machinery within five hours of taking the supplement. Don't use melatonin if you have an autoimmune disease.
Does melatonin cause weight gain?
Melatonin is not associated with weight gain. However, poor sleep is linked with weight gain. According to a study published in the journal JAMA Internal Medicine, not getting enough sleep or having inconsistent sleep patterns is associated with a higher body mass index (BMI).
Is 10 mg melatonin too much?
In adults, the standard dose used in studies ranges between 1 and 10 mg, although there isn't currently a definitive “best” dosage. It's believed doses in the 30-mg range may be harmful. In general, it's better to start low and move up slowly and carefully if you see encouraging results.
Is melatonin addictive or habit forming?
Melatonin doesn't cause withdrawal or symptoms of dependence, unlike other sleep medications. It also doesn't cause a sleep “hangover,” and you don't build up a tolerance to it. In other words, it doesn't cause you to need more and more as time goes on, which is a hallmark of addiction.
Is melatonin good for anxiety?
Melatonin, a hormone produced by your body, has been shown to improve symptoms of anxiety. Supplementing with melatonin for anxiety can improve sleep quality, regulate circadian rhythm, and ease negative feelings associated with anxiousness. Your hormone levels play a key role in your emotional state.
What is an alternative to melatonin?
If you are looking for a delicious and healthy way to relax before bedtime and prepare your body for rest, herbal teas are an excellent alternative to melatonin supplements. You will find many special blends with chamomile, lavender, and valerian which are excellent natural sleep aids.
What happens if you take melatonin and don't go to sleep?
Taking too much melatonin can actually cause rebound insomnia —either rendering the supplement ineffective or worse, exacerbating your already sleepless nights further. You only need tiny doses of melatonin to support your natural sleep cycle.
Does melatonin cause dementia?
There is some evidence that this treatment does improve sleep quality in people with Alzheimer's disease and Parkinson's disease but so far evidence suggests melatonin does not affect risk of dementia or cognitive function.
Does melatonin increase deep sleep?
Melatonin did not shift circadian phase or suppress temperature but did increase REM sleep continuity and promote decline in rectal temperature during sleep. These results were confirmed in patients who received melatonin in the second study (REM sleep percentage baseline/placebo/melatonin, 14.3/12.0/17.9).
Does melatonin hurt your kidneys?
Specifically, in two new studies recently published in the prestigious scientific journals «Journal of Clinical Medicine» and «Pharmaceuticals», researchers have developed it in an obese and diabetic rodent model, and have shown that melatonin protects the kidney damage caused by diabesity.
Does your body stop producing melatonin if you take melatonin?
By far the most common myth around melatonin is that supplementing with it will cause your brain to make less of it. Taking a melatonin supplement before bed will not affect the pineal gland's natural secretion of it. However, there are many factors that can decrease its production over time.
Does melatonin affect the kidneys?
Furthermore, melatonin exerts pluripotent protective effects in the kidneys by receptor-mediated or receptor-independent biological actions [8]. It modulates mitochondrial metabolism, increases ATP production and protects mitochondria against nitrative damage.
Does melatonin raise heart rate?
The evening administration of melatonin induced an increase of blood pressure and heart rate throughout the 24 h period (ΔSBP = + 6.5 mmHg, P < 0.001; ΔDBP = + 4.9 mmHg, P < 0.01; ΔHR = + 3.9 beats min−1, P < 0.01). The DBP as well as the HR increase were particularly evident during the morning and the afternoon hours.
Is 300 mcg of melatonin enough?
300mcg is the perfect amount for beginning to feel ready for bed. I take one about an hour before bed and it helps me to quickly fall asleep.
Does melatonin calm your mind?
In one 2017 animal study , melatonin increased levels of gamma-aminobutyric acid (GABA) in certain parts of the brain. Higher GABA levels can have a calming effect and reduce symptoms of anxiety. Other medications commonly used for anxiety, such as benzodiazepines, also increase GABA levels.
Can melatonin cause weight loss?
While melatonin alone will not aid in massive weight loss, it is recommended as a complementary weight loss strategy when used with increase in physical activity and a change in poor diet. Weight loss aside, melatonin directly helps regulate insulin sensitivity and acts as an anti-inflammatory.
Can melatonin be abused?
Melatonin is considered to be generally safe and is categorized by the Food and Drug Administration as a nutritional supplement. There are no known reports of intravenous melatonin abuse in the medical literature.