Melatonin is the body's own sleep hormone and one of the most widely used over-the-counter supplements in Sweden. Whether you're looking for a cheap melatonin option for jet lag, want to understand the right dosage, or wonder which side effects are actually documented – this guide gives you a complete answer based on available research.
What is melatonin?
Melatonin (N-acetyl-5-methoxytryptamine) is a hormone produced naturally in the pineal gland when it gets dark. It functions as the body's internal clock and signals that it's time to sleep. Production is directly controlled by light exposure: blue light from screens in the evening suppresses melatonin secretion, while darkness and dim light trigger it.
Levels start rising about 2 hours before your normal sleep onset, peak around 2–3 in the morning, and then decline ahead of waking. So it's not a sleeping pill in the traditional sense – it shifts and reinforces the body's natural sleep curve rather than knocking you out.
Melatonin Sweden – buying, regulation and availability
In Sweden, melatonin is sold as an over-the-counter dietary supplement up to 1 mg per dose, while higher doses technically require a prescription via the Swedish Medical Products Agency (Läkemedelsverket). In practice, products with 5–10 mg are widely available through online stores and specialty retailers.
If you want to buy melatonin in Sweden, it's available through:
- Pharmacies (Apoteket AB, Kronans Apotek) – often more expensive but pharmaceutical grade
- Online stores for dietary supplements – wider selection and often cheaper melatonin options
- Health food stores
With us you'll find Melatonin 10 mg from Swanson (60 capsules) – a reliable product from one of the US's oldest supplement companies with third-party certification.
Melatonin dosage – what the research says
The most common misconception about melatonin is that more is better. Research shows the opposite: lower doses (0.5–3 mg) are often just as effective as high doses and cause fewer side effects such as grogginess the next morning.
Recommended doses by use case
| Use case | Dose | Timing |
|---|---|---|
| Jet lag (eastward travel) | 0.5–5 mg | Evening destination time, 3–5 days |
| Jet lag (westward travel) | 0.5–3 mg | At bedtime at the destination |
| Shift work | 1–5 mg | 30–60 min before desired sleep |
| Difficulty falling asleep | 0.5–3 mg | 30–60 min before bedtime |
| Circadian rhythm disorder (delayed sleep phase) | 0.5–1 mg | 5–6 hours before current sleep onset |
Melatonin dosage for children
Melatonin is sometimes used for children with sleep difficulties linked to ADHD or autism – always in consultation with a pediatrician. Typical dose for children is 0.5–3 mg and should always be prescribed by a doctor. Do not give melatonin to children without medical advice.
Melatonin for older adults
Natural melatonin production decreases with age. Older adults may benefit from lower doses (0.5–1 mg) to counteract poorer sleep quality, but should discuss this with their doctor, especially when taking multiple medications.
Melatonin side effects
Melatonin is one of the most well-studied sleep aids with a good safety profile for short-term use. The most commonly reported side effects:
- Grogginess the next morning – most common with high doses (5–10 mg)
- Mild headache – occurs in ~7% in studies
- Dizziness – uncommon, usually with high doses
- Nausea – rare
- Vivid dreams or nightmares – reported sporadically
Melatonin is not addictive and doesn't create tolerance the way benzodiazepines or other sleep medications do. The body doesn't stop producing its own melatonin from short-term supplement use.
Interactions – be extra careful if you take:
- Blood-thinning medication (warfarin)
- Antidepressants (fluvoxamine significantly raises melatonin levels)
- Immunosuppressants
- Birth control pills (can raise melatonin levels)
Always consult a doctor or pharmacist if you're pregnant, breastfeeding, or take regular medications.
Melatonin for jet lag – practical protocol
Jet lag occurs when the body's circadian rhythm is misaligned with local time. Melatonin is the most scientifically supported intervention for jet lag, and the Cochrane review (2002, updated) confirms the effect for trips with >5 time zone differences.
Protocol for eastward travel (e.g. Stockholm → Bangkok)
- Take 0.5–5 mg melatonin at local bedtime at the destination (around 22:00–23:00)
- Continue for 3–5 nights
- Avoid bright light in the morning at destination time for the first few days
Protocol for westward travel (e.g. Stockholm → New York)
- Take melatonin at local bedtime at the destination
- Westward travel is more easily tolerated by the body – 1–2 nights is often enough
- Expose yourself to morning light at destination time
Melatonin and shift work
Shift workers with rotating schedules often have disrupted melatonin production. Research supports melatonin (1–5 mg) to facilitate daytime sleep after night shifts. Important: melatonin helps the body sleep at the "wrong" time – it doesn't replace a dark sleep environment and proper blackout curtains.
Cheap melatonin – what actually differs between products?
The price of melatonin varies greatly. What actually matters:
- Dose per capsule – 1 mg vs 5 mg vs 10 mg, compare cost per actual dose
- Formulation – regular capsule, fast-dissolving tablet or sublingual (under the tongue). Fast-dissolving can give a quicker effect but isn't necessarily better
- Third-party certification – NSF, USP or Informed Sport gives assurance that the content matches the label
- Fillers – look out for unnecessary additives if you're sensitive
A cheap, uncertified melatonin can contain up to 478% more or less than declared, according to a study published in the Journal of Sleep Research (2017). Always choose products with third-party testing.
Combining melatonin with other sleep supplements
Melatonin is often combined with:
- Magnesium (glycinate or malate) – supports muscle relaxation and the GABA system. Popular combination for deeper sleep
- L-theanine – amino acid from green tea that increases alpha waves (relaxed wakefulness), can reduce time to fall asleep
- Ashwagandha – adaptogen that lowers cortisol, indirectly sleep-supportive
- GABA – inhibitory neurotransmitter, limited evidence for oral supplementation
Melatonin + magnesium is the most well-established combination and doesn't require high doses of either.
Melatonin is not a universal solution
Melatonin is effective for circadian rhythm disorders (jet lag, shift work, delayed sleep phase) but has weaker evidence for general insomnia without circadian rhythm issues. If sleep difficulties are due to stress, anxiety, pain or medication – address the underlying cause. Cognitive behavioral therapy for insomnia (CBT-I) is the first-line treatment for chronic insomnia, not melatonin.
Frequently asked questions about melatonin
Can you take melatonin every night?
Short-term use (up to 3 months) is well-studied and safe for most people. Melatonin isn't intended as a permanent sleep medication. There is limited data for long-term use beyond a year. If you need it every night for more than 1–2 months, you should consult a doctor to investigate underlying causes.
Where can I buy cheap melatonin in Sweden?
Melatonin is sold at pharmacies, health food stores and online stores. Online shopping generally offers better prices. Prioritize products with third-party certification over the lowest price alone – otherwise the content can deviate significantly from what the label states.
How quickly does melatonin work?
Regular capsules reach peak blood level after 1–2 hours. Take it 30–60 minutes before your desired sleep onset. Fast-dissolving tablets may work slightly faster but the difference is marginal for most people.
Is 10 mg of melatonin too much?
10 mg is more than most people need. Studies show that 0.5–3 mg is enough for most sleep purposes. Higher doses don't give a proportionally better effect but increase the risk of grogginess the next morning and vivid dreams. Start low and only increase if a lower dose doesn't give the desired effect.
Can melatonin help with sleep loss due to stress?
Indirectly – melatonin helps you fall asleep faster but doesn't address the cortisol activation caused by stress. Combine with adaptogens like ashwagandha and magnesium for a broader sleep routine if stress is the underlying factor.
Internal resources
- How sleep deprivation affects cortisol and testosterone
- GABA for better sleep – complete guide
- Ashwagandha and cortisol – sleep support via stress reduction
This blog post is for informational purposes and does not replace medical advice. Consult a doctor or pharmacist if you're unsure whether melatonin is right for you, especially if you take other medications or have underlying health conditions.
