Melatonin
Melatonin is a natural hormone used to support the body in managing circadian rhythms and improving sleep cycles. It is widely recognised in various formulations, such as those branded as Circadin. Three formulations are available, including Meloset, Restfine, and Sleepose, for those addressing sleep difficulties through Sleep Management.
Key points
- A hormone naturally produced by the pineal gland, used in supplement form to shorten the time it takes to fall asleep.
- Often used to reset disrupted sleep patterns from jet lag or shift work rather than as a general sedative.
- Intended mainly for short-term use, and can interact with blood thinners, immunosuppressants or other sedative medicines.
What is Melatonin?
Melatonin is a hormone produced by the pineal gland in the brain that signals to the body that it is time to rest. Supplementing this hormone is a common approach for people with irregular sleep schedules or those who have difficulty falling asleep due to jet lag or shift work. It is considered an effective tool for re-establishing natural rest cycles.
What Melatonin is used for
Melatonin is frequently used by individuals struggling with Insomnia, reducing the time required to fall asleep. By mimicking the body’s natural increase of the hormone as evening approaches, it assists in calming the mind and preparing the body for rest.
Melatonin forms and brands
The availability of melatonin in different formulations allows individuals to choose what best suits their nocturnal needs. Brands like Circadin are well-known, while generics like Meloset, Restfine, and Sleepose offer alternative choices. Available options include prolonged-release tablet and film-coated tablet forms, which influence how the body absorbs the supplement throughout the night.
Safety overview for Melatonin
What to check before using this medicine
Do not use this if you have an allergy to melatonin or any ingredient in the product. It is intended for short-term use in many contexts.
Possible reactions and tolerability
Some people may experience mild drowsiness, headache, or dizziness. These are often temporary and related to the adjustment of the body to the supplement.
Interactions and health factors
Certain medications, such as blood thinners, immunosuppressants, or other sedatives, are known to interact with this hormone. Product labelling and verified clinical sources remain the correct references for specific contraindications, interactions and reactions.
Further reading
What is melatonin used for?
Melatonin is often used by people struggling with insomnia, as it reduces the time needed to fall asleep. It is also commonly used to reset disrupted sleep patterns caused by jet lag or shift work, rather than as a general sedative.
How does melatonin work?
Melatonin is a hormone produced by the pineal gland in the brain that signals to the body that it is time to rest. In supplement form it acts on MT1 and MT2 receptors in the brain to regulate sleep-wake cycles and promote the onset of sleep.
How long does melatonin take to work?
Melatonin usually starts working within about 1 to 2 hours, and its effect lasts around 6 to 8 hours, although this varies by person and formulation. Some formulations are prolonged-release, which influences how the body absorbs the supplement throughout the night.
What are the side effects of melatonin?
Some people may experience mild drowsiness, headache or dizziness, and these are often temporary. Other reported effects include irritability, nervousness and insomnia, while seizures are a serious effect reported in some cases that requires immediate medical attention.
Can melatonin be taken with alcohol?
Alcohol can interact with melatonin, so it is worth checking with a doctor or pharmacist before combining them.
Who should not take melatonin?
Do not use melatonin if you have an allergy to melatonin or any ingredient in the product, and it is not suitable for people with severe hepatic impairment. It is intended mainly for short-term use, so check with a doctor or pharmacist if you are unsure.
Which melatonin products does Yasabai sell?
Products containing melatonin include Meloset, Sleepose and Restfine. Compare forms, strengths and packs in the listings above.
Which brands contain melatonin?
Besides the products listed here, melatonin is sold under brand names such as Circadin. Names differ from country to country, so the active ingredient is the surest way to compare.
Is melatonin available over the counter in Thailand?
Yes. In Thailand melatonin is sold by pharmacists without a prescription, and Yasabai does not ask for one either. We are an online store, not a dispensing pharmacy; we arrange your order and delivery on your behalf.
Ordering without a prescription →Can I order melatonin online in Thailand?
Yes. Our pharmacy partners ship from India to Thailand and across Asia in discreet packaging. Standard Airmail takes up to 3 weeks; Express Tracked Courier takes up to 1 week.
How ordering works →Related articles
23 Sept 2026 ⋅ 13 min read
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