Look up melatonin in Wiktionary, the free dictionary. Hormone released by the pineal gland Not to be confused with melanin. Chemical compound Melatonin, an indoleamine, is a natural compound produced by various organisms, including bacteria and eukaryotes. Its discovery in 1958 by Aaron B. Lerner an

How long does Melatonin last?

The total duration of Melatonin via oral is 3 hours to 6 hours. Onset typically occurs within 5 minutes to 20 minutes. Peak effects last 1 hour to 2 hours.

Melatonin — SubstanceWiki

Melatonin

Substituted tryptamines · Oneirogen

Oneirogen(Substituted tryptamines)

Quick Dosage

oral1–3 mg (common)

Total duration (oral)3hr–6hr

View full details

Look up melatonin in Wiktionary, the free dictionary.

Hormone released by the pineal gland

Melatonin, an indoleamine, is a natural compound produced by various organisms, including bacteria and eukaryotes. Its discovery in 1958 by Aaron B. Lerner and colleagues stemmed from the isolation of a substance from the pineal gland of cows that could induce skin lightening in common frogs. This compound was later identified as a hormone secreted in the brain during the night, playing a crucial role in regulating the sleep-wake cycle, also known as the circadian rhythm, in vertebrates.

In vertebrates, melatonin's functions extend to synchronizing sleep-wake cycles, encompassing sleep-wake timing and blood pressure regulation, as well as controlling seasonal rhythmicity (circannual cycle), which includes reproduction, fattening, molting, and hibernation. Its effects are mediated through the activation of melatonin receptors and its role as an antioxidant. In plants and bacteria, it serves as a defense mechanism against oxidative stress, indicating its evolutionary significance. Mitochondria, key organelles, are the main producers of melatonin, underscoring its "ancient origins" and its fundamental role in protecting the earliest cells from reactive oxygen species.

In addition to its endogenous functions as a hormone and antioxidant, melatonin is also administered exogenously as a dietary supplement and medication. Melatonin is used medically primarily for sleep-related problems: for example, prolonged-release melatonin (Circadin) is approved in several countries for short-term treatment of insomnia in people aged 55 years of age or older. It is used in the treatment of sleep disorders, including insomnia and various circadian rhythm sleep disorders.

How It Feels

Melatonin does not so much produce an effect as it produces a permission -- a biochemical signal to the body that it is now acceptable to sleep. The onset takes twenty to forty minutes, during which the first signs are barely distinguishable from the ordinary fatigue of a late evening: a heaviness behind the eyes, a slight cooling of the body's internal temperature, a gradual withdrawal of the mental energy that keeps wakefulness organized. The lights in the room seem slightly brighter, as though the pupils have made a subtle adjustment that increases sensitivity to ambient light.

As the melatonin reaches its working level, drowsiness deepens from a suggestion into a gentle insistence. The eyelids grow heavier. The body's relationship with gravity shifts slightly -- you become more aware of your weight, more conscious of the comfort of horizontal surfaces, more inclined to let the couch or bed absorb your mass. Thoughts slow and lose their coherence, transitioning from the structured logic of waking to the loose, associative drift of pre-sleep consciousness. It is not sedation in the pharmacological sense; there is no forced depression of neural activity, no chemical heaviness being imposed from without. Instead, it feels like the body's own sleep drive has been amplified, its natural evening drowsiness arriving with slightly more conviction than usual.

The emotional tone is neutral to mildly pleasant. There is no euphoria, but there is a quiet settling, a smoothing of whatever anxieties or preoccupations were occupying the mind. The day's concerns recede to a comfortable distance, their urgency dissolving in the growing drowsiness. The transition into sleep itself is often smoother than without melatonin -- the usual period of restless adjustment, of repositioning and mind-wandering that precedes sleep, is shortened.

The dreams that melatonin produces are its most distinctive subjective feature. They are often unusually vivid, richly detailed, and narratively complex -- not nightmares necessarily, but dreams with a cinematic quality that makes them memorable upon waking. Colors appear more saturated. Scenarios are more elaborate. Emotional content is amplified. For some, this dream intensification is the most noticeable effect of melatonin, the waking experience being too subtle to register while the sleeping experience announces itself with unusual clarity.

Waking after melatonin is generally clean and unencumbered. There is no grogginess, no sedative hangover, no sense of having been drugged. The body wakes with its normal rhythm, perhaps slightly more refreshed than usual, carrying only the fading traces of whatever vivid dreams the melatonin facilitated. The overall experience is one of the gentlest pharmacological interventions imaginable -- a nudge, not a push, in the direction of rest.

Pharmacology

Melatonin is non-addictive, not known to be harmful,extremely low toxicity relative to dose. Similar to other tryptamines, there are relatively few physical side effects associated with acute melatonin exposure. Various studies have shown that in reasonable doses in a careful context, it presents no negative cognitive, psychiatric, or toxic physical consequences.

Melatonin appears to cause very few side effects as tested in the short-term (up to three months) at low doses. Two systematic reviews found no adverse effects of melatonin usage in several clinical trials, while comparative trials found the adverse effects headaches, dizziness, nausea, and drowsiness were reported about equally for both melatonin and placebo. Prolonged-release melatonin is safe with long-term use of up to 12 months.

The median lethal dose of melatonin at which 50% of participants die (LD50) for human beings has never been reached in any setting. -not habit-forming. It is possible, however, to develop a mild physical dependency if this compound is used on a nightly basis for a prolonged period. This simply means that if one suddenly stops their usage of the substance without tapering, they may have trouble sleeping for a couple of days afterward.after prolonged and repeated usage. After that,714 days to be back at baseline (in the absence of further consumption). Melatonin presents cross-tolerance with Cross-no other known compounds, meaning that after the use of melatonin, other psychoactive compounds will not have a reduced effect.

Australia: Melatonin is schedule 4 (prescription only) except when included in schedule 3 (pharmacist only) for human use:
in modified release tablets containing 2 mg or less of melatonin for monotherapy for the short term treatment of primary insomnia characterised by poor quality of sleep for adults aged 55 or over, in packs containing not more than 30 tablets.
Canada: Melatonin is freely available to purchase as a dietary supplement and can be found at most pharmacies and grocery stores across the country.
France: Melatonin is available over the counter
Germany: Melatonin is a prescription medicine, according to Anlage 1 AMVV. It is however available as a dietary supplement in certain forms, often in low dosages or as combination preparations.
India: Melatonin is legal to purchase as a dietary supplement.
Italy: Melatonin is legal to purchase as a dietary supplement.
Ireland: Melatonin is a prescription-only medicine.
Sweden: Melatonin is an over-the-counter medication in small amounts, but generally a prescription pharmaceutical.
Switzerland: Melatonin is listed as a "Abgabekategorie B" pharmaceutical, which generally requires a prescription.
United Kingdom: Melatonin is a licensed prescription-only medicine (POM) in the United Kingdom. It is not a criminal offense to possess this medicine without a valid prescription. This medicine can legally be obtained with a valid prescription or through legal import of the medicine for personal use as outlined in Section 13 of the Medicines Act 1968.
United States: Melatonin is listed as an uncontrolled substance and is legal to possess and distribute, and is freely available to purchase as a dietary supplement.
Responsible use
Oneirogen
Neurotransmitter
Hormone
Tryptamine
Melatonin (Wikipedia)
Melatonin as a medication and supplement (Wikipedia)
Melatonin (Erowid Vault)
Melatonin (TiHKAL / Isomer Design)
Melatonin (DrugBank)
Melatonin (Drugs.com)
Melatonin (Examine)

Toxicity & Safety

Melatonin is non-addictive, not known to be harmful, and has an extremely low toxicity relative to dose. Similar to other tryptamines, there are relatively few physical side effects associated with acute melatonin exposure. Various studies have shown that in reasonable doses in a careful context, it presents no negative cognitive, psychiatric, or toxic physical consequences.

Lethal dosage

The median lethal dose of melatonin at which 50% of participants die (LD50) for human beings has never been reached in any setting.

Dependence and abuse potential

Melatonin is not habit-forming. It is possible, however, to develop a mild physical dependency if this compound is used on a nightly basis for a prolonged period. This simply means that if one suddenly stops their usage of the substance without tapering, they may have trouble sleeping for a couple of days afterward.

Tolerance to the effects of melatonin is slowly built after prolonged and repeated usage. After that, it takes about 7 days for the tolerance to be reduced to half and 14 days to be back at baseline (in the absence of further consumption). Melatonin presents cross-tolerance with no other known compounds, meaning that after the use of melatonin, other psychoactive compounds will not have a reduced effect.

Addiction Potential

not habit-forming

Overdose Information

lethal dose of melatonin at which 50% of participants die (LD50) for human beings has never been reached in any setting. -not habit-forming. It is possible, however, to develop a mild physical dependency if this compound is used on a nightly basis for a prolonged period. This simply means that if one suddenly stops their usage of the substance without tapering, they may have trouble sleeping for a couple of days afterward.after prolonged and repeated usage. After that,714 days to be back at baseline (in the absence of further consumption). Melatonin presents cross-tolerance with Cross-no other known compounds, meaning that after the use of melatonin, other psychoactive compounds will not have a reduced effect.

Australia: Melatonin is schedule 4 (prescription only) except when included in schedule 3 (pharmacist only) for human use:
in modified release tablets containing 2 mg or less of melatonin for monotherapy for the short term treatment of primary insomnia characterised by poor quality of sleep for adults aged 55 or over, in packs containing not more than 30 tablets.
Canada: Melatonin is freely available to purchase as a dietary supplement and can be found at most pharmacies and grocery stores across the country.
France: Melatonin is available over the counter
Germany: Melatonin is a prescription medicine, according to Anlage 1 AMVV. It is however available as a dietary supplement in certain forms, often in low dosages or as combination preparations.
India: Melatonin is legal to purchase as a dietary supplement.
Italy: Melatonin is legal to purchase as a dietary supplement.
Ireland: Melatonin is a prescription-only medicine.
Sweden: Melatonin is an over-the-c

Melatonin

Quick Dosage

Dosage

oral

Duration

oral

How It Feels

Subjective Effects

Physical Effects

Physical(7)

Cognitive & Perceptual Effects

Cognitive(7)

Pharmacology

Detection Methods

Standard Drug Panel Inclusion

Urine Detection

Blood and Saliva Detection

Hair Follicle Detection

Confirmatory Testing

Reagent Testing

Interactions

History

Harm Reduction

General Principles

Melatonin-Specific Harm Reduction

Toxicity & Safety

Addiction Potential

Overdose Information

Tolerance

Legal Status

Experience Reports (2)

Tips (8)

Community Discussions (10)

See Also

References (4)

Frequently Asked Questions