Insomnia
A disorder of sleep — not a sleeping-pill deficiency
What it is
Chronic insomnia disorder is persistent difficulty falling asleep, staying asleep, or waking too early — occurring at least three nights a week for at least three months, despite adequate opportunity to sleep, and causing daytime impairment. It is a disorder in its own right, not simply a symptom of a busy life.
Why it matters
Insomnia is extremely common, genuinely disabling, and treated almost exactly backwards. The best-evidenced treatment is not a drug: cognitive behavioural therapy for insomnia (CBT-I) outperforms sleeping tablets and, crucially, its benefits persist after treatment ends — which is precisely what medication cannot claim. Yet most people are offered a pill, or reach for melatonin, and never hear that the superior treatment exists.
What BioSignal knows about treating this
What works for Insomnia
BioSignal’s clinical summary, most important first.
- CBT-I — FIRST-LINE. Superior to medication, and the benefit persists after treatment stops
- Stimulus control and sleep restriction (the active ingredients of CBT-I — and counter-intuitive)
- Treating the drivers: sleep apnoea, pain, depression, alcohol, caffeine
- Sleeping tablets (Z-drugs, benzodiazepines) — short-term only; tolerance, dependence, falls, rebound
- Melatonin — modest, and mainly for circadian problems and jet lag rather than chronic insomnia
- Sleep hygiene advice alone is NOT sufficient treatment (a persistent misunderstanding)
Signal Records relevant to this condition
Interventions and contributing factors — some of these records describe a cause rather than a cure. The rating shown is BioSignal’s confidence in that Signal Record, not a claim about how well it treats this condition. Open any of them for the full evidence.
- MelatoninHigh confidence
A body-clock signal, not a sleeping pill. Genuinely useful for jet lag and circadian rhythm disorders; weak for ordinary insomnia. More is not better — and the doses sold are typically far above what the evidence used.
- MagnesiumModerate confidence
Genuinely effective for a few specific things — eclampsia (in hospital), constipation, migraine prevention, and a modest blood-pressure effect. The reasons most people actually buy it — sleep, cramps, anxiety — are the weakest part of the evidence.
- L-TheanineLimited evidence
Mild calm alertness; modest attention benefit with caffeine; no durable cognitive enhancement or protection.
- AlcoholHigh confidence
A Group 1 carcinogen with dose-dependent harms. The heart-protection belief does not survive the methods designed to test it. Cutting back helps, even without quitting.
- CaffeineHigh confidence
One of the best-evidenced functional compounds there is: it reliably improves alertness and endurance performance, and it is safe for most healthy adults up to about 400 mg a day. It does not dehydrate you. It does wreck your sleep for far longer than you think.
- AshwagandhaLimited evidence
The best-evidenced hormone supplement — a modest stress effect. Weak testosterone evidence, and a real liver-injury signal that the label won't mention.
- Antidepressants (SSRIs & SNRIs)High confidence
They beat placebo — the evidence is strong. The average effect is modest and grows with severity. The chemical-imbalance explanation was wrong; the medication still works. Withdrawal is real: taper slowly, never abruptly, with your prescriber.
New to this? Read these first
How this usually unfolds
- Recognize risk factors
- Get diagnosed
- Track key biomarkers
- Lifestyle first
- Evidence-based treatment
- Long-term monitoring
Who is at risk
- Stress and life events
- Depression and anxiety (bidirectional — each drives the other)
- Shift work and irregular schedules
- Chronic pain
- Caffeine and alcohol
- Older age
- Female sex
- Untreated obstructive sleep apnoea or restless legs (frequently misread as insomnia)
How it's diagnosed
Insomnia is a clinical diagnosis based on the symptom pattern, duration, and daytime impact — often supported by a sleep diary. A sleep study is NOT routinely required, but other sleep disorders must be considered and excluded: obstructive sleep apnoea, restless legs syndrome, and circadian rhythm disorders are all commonly mistaken for insomnia, and all need different treatment.
Key biomarkers
Biomarker pages for this condition are on the roadmap.
Lifestyle
Explore this condition across BioSignal
Related Foundations
Related Signal Records
Frequently asked questions
What actually treats insomnia?
CBT-I — cognitive behavioural therapy for insomnia — and this is the most under-known fact in sleep medicine. It outperforms sleeping tablets in head-to-head comparison, and unlike medication its benefit LASTS after you stop. Major guidelines recommend it as first-line ahead of drugs. Most people have never been offered it, and many have never heard of it. If you take one thing from this page, take that.
Isn't CBT-I just sleep hygiene advice?
No, and this confusion is a real problem — because sleep hygiene alone does not work as a treatment. CBT-I contains two counter-intuitive active ingredients: stimulus control (get out of bed when you cannot sleep, so the bed stops being a place of frustration) and sleep restriction (temporarily spending LESS time in bed to consolidate sleep). Being told to avoid screens and keep the room cool is not CBT-I, and it is not treatment.
What about sleeping tablets?
They work in the short term, and there are situations where that is exactly what is needed. But they sedate rather than treat: tolerance builds, stopping causes rebound insomnia, and in older adults they meaningfully increase falls, fractures, and cognitive impairment. Guidelines recommend them for short-term use only — not as the answer to a chronic problem.
Does melatonin work for insomnia?
Less than its popularity suggests. Melatonin is a circadian signal, not a sedative: it is most useful for jet lag and for circadian rhythm problems such as delayed sleep phase. For chronic insomnia in adults, its effect is modest at best. It is low-risk to try — but it is not the treatment, and taking it every night for years is not a plan.
I lie awake worrying that I'm not getting eight hours. Is that harming me?
The worry itself is part of the problem, and this deserves saying gently. Anxiety about sleep is one of the mechanisms that perpetuates insomnia — the harder you try to sleep, the more the bed becomes a site of effort and failure. Sleep need varies between people, and chasing an exact number can make things worse. This paradox is precisely what CBT-I is designed to break.
Evidence summary
CBT-I has strong randomised evidence, outperforms pharmacotherapy in head-to-head comparisons, and — uniquely — sustains benefit after treatment ends. It is recommended as first-line by major guidelines including the American Academy of Sleep Medicine and the American College of Physicians. Hypnotic medications (Z-drugs, benzodiazepines) have modest short-term efficacy with well-documented risks of tolerance, dependence, rebound insomnia, and falls and cognitive impairment in older adults. Melatonin has modest evidence, chiefly for circadian rhythm disorders and jet lag rather than chronic insomnia. Sleep hygiene education alone is not effective as monotherapy.
References & sources
- AASM Clinical Practice Guideline for the Behavioral and Psychological Treatment of Chronic Insomnia
- American College of Physicians guideline: Management of Chronic Insomnia Disorder in Adults
- Head-to-head randomised trials of CBT-I versus hypnotics
Educational information — not medical advice
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