Melatonin Spray Dosage: How Many Sprays, How Much and When

For our Melatonin Nasal Spray, the dose is 2 sprays into the nose, 15 to 30 minutes before your intended bedtime. That 2-spray serving gives 200 mcg (0.2 mg) of melatonin with 17 mg of L-theanine, and the label allows you to repeat the 2 sprays once if, after half an hour, the effect feels too light. Other melatonin sprays vary a lot in how much each spray holds, so always check the amount per spray on the label rather than counting sprays alone.

Key Takeaways

• One serving of our Melatonin Nasal Spray is 2 sprays: 200 mcg of melatonin and 17 mg of L-theanine, about 100 mcg of melatonin per spray.
• Use it 15 to 30 minutes before bed. If half an hour passes and you want more, the label allows one repeat of the 2-spray serving.
• Studies of melatonin have used a wide range of amounts. In a classic trial, evening doses of just 0.3 mg or 1.0 mg shortened the time it took volunteers to fall asleep, with no morning hangover effects on mood or performance tests (Zhdanova et al., 1995).
• Melatonin has a short half-life of about 45 minutes after a standard oral dose (Harpsøe et al., 2015).
• Short-term use of melatonin appears to be safe for most people, and the side effects reported in studies were mild (NCCIH).

How Many Sprays of Melatonin Should I Take?

With our spray, 2 sprays is one full serving. The amounts below come straight from the label, which lists 200 mcg of melatonin and 17 mg of L-theanine per 2-spray serving, in alkaline water:

Sprays	Melatonin	L-theanine	When it applies
1 spray	About 100 mcg (0.1 mg)	About 8.5 mg	Half a serving; the label serving is 2 sprays
2 sprays	200 mcg (0.2 mg)	17 mg	The standard serving, 15 to 30 minutes before bed
4 sprays	400 mcg (0.4 mg)	34 mg	The most the label allows in a night: one serving, then one repeat after 30 minutes if needed

Start with the 2-spray serving and see how it suits you. Because each spray carries a small, measured amount, you can stay at the low end and only add the repeat serving on nights you want it. If you are coming from pills or gummies, our guide to melatonin spray vs pills and gummies compares the formats, and our melatonin dosage guide covers tablet and capsule amounts.

Melatonin Spray Directions, Step by Step

1. Time it. Use the spray 15 to 30 minutes before you plan to be in bed with the lights out.
2. Spray gently. Give the 2 sprays while breathing in gently through your nose. If you taste it at the back of your throat, you breathed in too hard; go softer next time.
3. Hold it. Tilt your head back slightly and wait at least 60 seconds before blowing your nose, so the mist stays on the lining of the nose. It is absorbed through the lining of the nose, so some of each dose skips digestion.
4. Dim the room. Keep the lights low and the bedroom cool. Bright light in the evening works against the signal melatonin sends.
5. Repeat only if needed. If half an hour passes and the effect feels too light, you may repeat the 2-spray serving once.

Our Melatonin Nasal Spray FAQ answers more common questions about the spray.

How Much Melatonin Have Studies Used?

There is no official dose for melatonin, so research is the best guide. Studies have tested a very wide range, from fractions of a milligram up to far higher amounts. A review of how melatonin moves through the body pooled 22 studies with doses from 0.3 mg to 100 mg (Harpsøe et al., 2015). For sleep, these are the findings most useful when choosing an amount:

Study	What was tested	What it found
Zhdanova et al., 1995	0.3 mg or 1.0 mg of melatonin, or placebo, taken by volunteers at 6, 8 or 9 PM, with sleep measured in the lab	Either dose at any of the three times shortened the time to fall asleep; no hangover effects on next-morning mood or performance tests; REM sleep was not suppressed
Cruz-Sanabria et al., 2024	A dose-response analysis of 26 double-blind trials in adults	Across the doses tested, melatonin shortened the time it took to fall asleep and lengthened total sleep time

Put together, the research shows that small amounts can do real work when the timing is right, and that timing matters as much as the number on the label (Zhdanova et al., 1995; Cruz-Sanabria et al., 2024). Our spray sits at the low, measured end of that range, which suits people who want a gentle bedtime signal without a big dose.

One more reason to read labels closely: a 2017 study of 31 melatonin supplements found that for most of them, the amount inside did not match the label, and a 2023 study of 25 gummy products found 22 were mislabeled, ranging from 74% to 347% of the stated amount, with one containing no detectable melatonin (NCCIH). Our spray is made with third-party tested ingredients.

Nasal Melatonin Spray vs Oral Melatonin Spray

"Melatonin spray" can mean two different things, and the dose works differently for each:

• Nasal spray: a fine mist into the nose, absorbed through the lining of the nose, so some of each dose skips digestion. A 2016 systematic review of 10 studies of non-oral melatonin routes described the nasal route as having large potential (Zetner et al., 2016).
• Oral spray: sprayed into the mouth or under the tongue. The same review found that melatonin taken through the lining of the mouth reached higher blood levels than melatonin that was swallowed (Zetner et al., 2016). Oral sprays are usually dosed in several sprays, and the amount per spray varies widely between products.
• Swallowed pills and gummies: only about 15% of an oral dose reaches the bloodstream on average, with a range of 9% to 33% across studies (Harpsøe et al., 2015).

Whatever the format, the rule is the same: find the melatonin amount per spray on the label, multiply by the number of sprays, and stay within the directions.

How Long Does Melatonin Spray Last?

Melatonin does not linger long in the blood. After standard oral doses, its half-life was about 45 minutes, and across individual studies it ranged from 28 to 126 minutes (Harpsøe et al., 2015). That short half-life is part of why melatonin acts as a timing signal for sleep rather than something that keeps you sedated all night.

It also helps explain why low evening doses did not leave volunteers groggy: in the 1995 trial, neither 0.3 mg nor 1.0 mg affected next-morning mood or performance tests (Zhdanova et al., 1995). Melatonin may stay active longer in older adults, which can mean some daytime drowsiness (NCCIH), so older adults may want to stay with the single 2-spray serving. Our guide to how long melatonin lasts goes deeper on half-life and next-day grogginess.

Is It Safe to Use Melatonin Spray Every Night?

Most people tolerate melatonin well. Short-term use of melatonin appears to be safe for most people, and a 2015 review found only mild side effects in short-term studies, such as headache, dizziness, nausea and sleepiness (NCCIH). Our spray is made for regular evening use as part of a steady sleep routine, and using the same small serving at the same time each night fits how melatonin works best.

A few sensible limits: do not drive or do anything that needs full alertness after using it, and skip it on nights you drink (see melatonin and alcohol). Talk with a clinician first if you are pregnant or breastfeeding, have epilepsy, or take a blood thinner or any other prescription medicine. Our guide to melatonin side effects covers dreams, headaches and grogginess in more detail.

Where Our Melatonin Nasal Spray Fits

Our Melatonin Nasal Spray gives 200 mcg of melatonin and 17 mg of L-theanine in every 2-spray serving, in alkaline water, made with third-party tested ingredients. Use 2 sprays 15 to 30 minutes before bed, hold your head back for 60 seconds, and repeat once after 30 minutes only if you need to. The L-theanine is there for a calmer wind-down; our guide to melatonin and L-theanine explains the pairing. For calm earlier in the day, our Theanine Nasal Spray gives 36 mg of L-theanine per 2-spray serving with no melatonin. Learn more on our melatonin ingredient page and our sleep health hub.

Frequently Asked Questions

How many sprays of melatonin should I take?

For our Melatonin Nasal Spray, take 2 sprays into the nose 15 to 30 minutes before bed. For other sprays, check the melatonin amount per spray on the label, because it varies between products.

What is the melatonin spray dose for an adult?

Our adult serving is 2 sprays, giving 200 mcg (0.2 mg) of melatonin and 17 mg of L-theanine. The label allows one repeat serving after 30 minutes, for a nightly maximum of 4 sprays.

How much melatonin is in one spray?

In our spray, about 100 mcg (0.1 mg), since each 2-spray serving holds 200 mcg.

What are the directions for melatonin spray?

Give 2 sprays while breathing in gently through your nose, tilt your head back slightly, and wait at least 60 seconds before blowing your nose. Use it 15 to 30 minutes before your intended bedtime.

How long does melatonin spray last?

Melatonin has a half-life of about 45 minutes after standard oral doses, with a range of 28 to 126 minutes across studies. It acts as a bedtime signal rather than a sedative that lasts all night.

Can I take more than 2 sprays?

Yes, within the label: if half an hour passes and the effect feels too light, you may repeat the 2-spray serving once. Do not go beyond that in one night.

Is an oral melatonin spray the same as a nasal spray?

No. An oral spray goes into the mouth and is absorbed through the lining of the mouth, while a nasal spray is absorbed through the lining of the nose. The amount per spray also differs by product.

Can I use melatonin spray every night?

Yes. Our spray is designed for regular evening use as part of a consistent sleep routine. Check with a clinician first if you are pregnant, breastfeeding or take prescription medicine.

Sources

• Zhdanova IV, Wurtman RJ, Lynch HJ, et al. Sleep-inducing effects of low doses of melatonin ingested in the evening. Clinical Pharmacology and Therapeutics, 1995. https://pubmed.ncbi.nlm.nih.gov/7768078/
• Harpsøe NG, Andersen LP, Gögenur I, Rosenberg J. Clinical pharmacokinetics of melatonin: a systematic review. European Journal of Clinical Pharmacology, 2015. https://pubmed.ncbi.nlm.nih.gov/26008214/
• Cruz-Sanabria F, Bruno S, Crippa A, et al. Optimizing the time and dose of melatonin as a sleep-promoting drug: a systematic review of randomized controlled trials and dose-response meta-analysis. Journal of Pineal Research, 2024. https://pubmed.ncbi.nlm.nih.gov/38888087/
• Zetner D, Andersen LP, Rosenberg J. Pharmacokinetics of alternative administration routes of melatonin: a systematic review. Drug Research, 2016. https://pubmed.ncbi.nlm.nih.gov/26514093/
• National Center for Complementary and Integrative Health. Melatonin: What You Need To Know (updated May 2024). https://www.nccih.nih.gov/health/melatonin-what-you-need-to-know

These statements have not been evaluated by the Food and Drug Administration. This content is for education and is not medical advice. Our products are not intended to diagnose, treat, cure or prevent any disease. Talk with a healthcare provider before starting a new supplement if you are pregnant, breastfeeding or taking medication.