Chronic pain affects hundreds of millions of people worldwide, and in India alone, musculoskeletal pain — back pain, joint pain, fibromyalgia, and persistent muscle aches — is one of the most common reasons people visit a physician. Most reach for ibuprofen, paracetamol, or diclofenac. A new study published in July 2026 suggests there may be a safer, better-tolerated option already sitting in your medicine cabinet: melatonin.
The finding is surprising to most people. Melatonin is widely known as a sleep supplement. But researchers have found that it reduces chronic musculoskeletal pain as effectively as standard over-the-counter pain medications — with fewer gastrointestinal side effects and no dependency risk.
What the New Study Found
Researchers analysed data from multiple clinical trials involving people with chronic musculoskeletal pain — conditions including fibromyalgia, chronic lower back pain, and arthritis-related discomfort. Participants who took melatonin at analgesic doses (typically 3mg to 10mg per night) reported pain reduction comparable to those taking standard OTC pain relievers such as ibuprofen and paracetamol.
The key finding: melatonin’s pain-relieving effect was not just a byproduct of improved sleep. Even when accounting for sleep quality improvements, melatonin independently reduced pain intensity. This matters because it confirms melatonin has genuine analgesic properties — it is not simply helping people sleep through the pain.
Importantly, melatonin was significantly better tolerated. Participants reported far fewer gastrointestinal complaints — no stomach irritation, no ulcer risk, no kidney strain — which are the well-documented side effects of long-term NSAID use.
Why Melatonin Works for Pain — The Science
Most people do not realise that melatonin receptors exist throughout the human body — not just in the brain. These MT1 and MT2 receptors are found in the spinal cord, peripheral nerves, immune cells, and musculoskeletal tissues. When melatonin binds to these receptors, it triggers three distinct pain-reducing mechanisms:
How Melatonin Reduces Chronic Pain
Anti-inflammatory action. Melatonin suppresses pro-inflammatory cytokines — the chemical signals that drive chronic inflammation in joints and muscles. This is the same mechanism targeted by NSAIDs, but melatonin achieves it through a different pathway without damaging the stomach lining.
Central pain modulation. Melatonin acts on receptors in the spinal cord that regulate how pain signals travel to the brain. It essentially turns down the volume on pain perception — a process called central sensitisation. This is particularly relevant for fibromyalgia and chronic lower back pain, where the nervous system becomes hypersensitive to pain.
Antioxidant protection. Melatonin is one of the most potent antioxidants the human body produces. Oxidative stress — the damage caused by free radicals — plays a significant role in chronic pain conditions, particularly in joints and connective tissue. Melatonin neutralises this damage at the cellular level.
Which Types of Chronic Pain Respond to Melatonin
The research evidence is strongest for these conditions:
Fibromyalgia. Multiple randomised controlled trials have shown that melatonin significantly reduces pain scores in fibromyalgia patients. In one key study, patients taking 5mg of melatonin nightly for four weeks reported a 34% reduction in pain intensity. Fibromyalgia responds particularly well because melatonin addresses both the inflammatory component and the central nervous system hypersensitivity that characterises the condition.
Chronic lower back pain. A common condition in India — exacerbated by sedentary desk work, improper posture, and heavy physical labour — responds favourably to melatonin supplementation, with studies showing reduced pain intensity and improved functional ability.
Osteoarthritis. Melatonin has shown chondroprotective effects — meaning it helps protect cartilage from further breakdown — in addition to its anti-inflammatory benefits. This makes it particularly valuable for the management of knee and hip osteoarthritis.
Migraine and headache. Clinical trials show melatonin taken nightly reduces both the frequency and severity of migraine attacks. Some neurologists now consider it a first-line preventive option alongside established migraine prophylaxis medications.
IBS-related abdominal pain. Melatonin is produced in significant quantities in the gastrointestinal tract, and studies confirm it reduces visceral pain — the chronic cramping and discomfort associated with irritable bowel syndrome.
The Right Dose — Pain Relief Requires More Than Sleep Doses
This is important to understand. The doses commonly sold for sleep — 0.5mg to 1mg — are typically too low for analgesic effects. The research on pain relief uses doses of 3mg to 10mg, taken approximately 30 minutes before sleep.
Starting at 3mg and increasing gradually to 5mg if needed is the approach most studies have used. At these doses, melatonin remains well-tolerated with no serious adverse effects reported in clinical trials.
Important: Consult your physician before using melatonin for pain
Melatonin is generally safe but can interact with blood thinners, diabetes medications, and immunosuppressants. People with autoimmune conditions should use it under medical supervision. It is not recommended during pregnancy or breastfeeding.
Melatonin vs NSAIDs — Why This Matters for Long-Term Users
Chronic pain by definition requires long-term management. And this is where the melatonin finding has the most clinical significance.
Long-term NSAID use — which is the standard treatment for chronic musculoskeletal pain in India — carries significant risks: gastrointestinal bleeding, peptic ulcers, kidney damage, and cardiovascular events. In India, where NSAIDs are available over the counter and often taken without medical guidance, these risks are poorly appreciated.
Melatonin offers a comparable pain-relieving effect over the long term with none of these risks. It is not addictive, does not require dose escalation, and does not damage the stomach lining or kidneys.
For older adults — who are simultaneously the highest users of NSAIDs and the most vulnerable to their side effects — this finding is particularly significant.
Sleep Quality and Pain — A Two-Way Relationship
One reason melatonin may be especially effective for chronic pain is that it addresses a key amplifier: poor sleep. Chronic pain disrupts sleep, and poor sleep dramatically worsens pain sensitivity — a cycle that is difficult to break with conventional painkillers alone.
Melatonin interrupts this cycle by improving sleep architecture — particularly deep, restorative slow-wave sleep — which in turn reduces central sensitisation and lowers pain intensity the following day.
If you are dealing with chronic pain and also struggling with sleep, a high-quality ashwagandha supplement can work synergistically with melatonin. Ashwagandha (particularly KSM-66 extract) is clinically validated for reducing cortisol, improving sleep quality, and reducing inflammatory markers — all of which contribute to better pain management.
Recommended: Ashwagandha KSM-66 for Sleep and Pain Support
KSM-66 ashwagandha is the most clinically studied form — shown to reduce cortisol by 27%, improve sleep quality, and lower inflammatory markers. It pairs well with melatonin for those managing chronic pain with sleep disruption.
Practical Guidance for Indian Readers
Melatonin is available in India as an over-the-counter supplement in most pharmacies and online. For pain management, choose a 3mg or 5mg formulation (not the 0.5mg or 1mg sleep variants).
Take it 30 minutes before sleep. Give it at least four weeks — the pain-relieving effects build over time, unlike the immediate but short-lasting effect of NSAIDs.
If you have been taking NSAIDs long-term for chronic pain, do not stop them abruptly — work with your physician to gradually transition while monitoring your pain levels. Melatonin is a complement to medical care, not a replacement for a proper diagnosis and treatment plan.
The Bigger Picture
This study is part of a growing body of evidence repositioning melatonin from a simple sleep aid to a genuine therapeutic agent with wide-ranging applications — pain management, neuroprotection, cardiovascular health, and immune modulation among them.
For the hundreds of millions of people worldwide managing chronic pain with daily NSAID use, this research offers a meaningful alternative — one that is safer, better tolerated, and increasingly supported by clinical evidence.
Dr. Ajit Kumar is a physician with an MD in Medicine. He writes on evidence-based health topics at medimadad.com. This article is for informational purposes only and does not constitute medical advice. Consult your physician before starting any new supplement.