Quick answer: chronic insomnia has a clear first-line insomnia treatment, and it isn’t a pill. The American College of Physicians recommends cognitive behavioural therapy for insomnia (CBT-I) as the initial treatment for all adults with chronic insomnia — a strong recommendation. It works about as well as sleeping pills in the short term, carries fewer harms, and unlike medication its benefits tend to persist after treatment ends.
What this guide covers
- What counts as insomnia
- What actually causes it
- Why insomnia keeps itself going
- CBT-I: the first-line treatment
- The five components of CBT-I
- How to access CBT-I
- Where medication fits
- What about supplements?
- When to see a doctor
- Common questions
- The takeaway
What counts as insomnia
Insomnia isn’t defined by a number of hours. It’s difficulty falling asleep, staying asleep, or waking too early — despite adequate opportunity to sleep — combined with daytime consequences such as fatigue, poor concentration, irritability, or impaired performance.
That second half matters. Someone who sleeps six hours and feels fine does not have insomnia. Someone who sleeps seven hours but lies awake for ninety minutes to get there, and feels wrecked the next day, does.
Short-term (acute) insomnia lasts days to a few weeks, usually tied to an identifiable stressor, and often resolves on its own. Chronic insomnia means symptoms at least three nights a week for three months or longer. The distinction matters because chronic insomnia rarely resolves without a change in approach — and it has a specific, well-evidenced treatment.
What actually causes it
Clinicians often describe insomnia using three contributing factors:
- Predisposing — traits that make you vulnerable: a tendency toward worry, being a light sleeper, family history, older age.
- Precipitating — the trigger: stress, illness, bereavement, a new baby, shift work, a period of pain.
- Perpetuating — the responses that keep it running after the trigger has gone: spending longer in bed to “catch up,” napping, drinking more caffeine, going to bed early, checking the clock.
The perpetuating factors are the important ones, because they’re the ones you can change — and they’re precisely what CBT-I targets.
Insomnia also frequently accompanies other conditions: depression and anxiety, chronic pain, sleep apnoea, restless legs, thyroid problems, menopause, and a number of medications. Treating insomnia alongside those conditions generally works better than waiting for the other condition to resolve first.
Why insomnia keeps itself going
This is the single most useful thing to understand about chronic insomnia.
After a few bad nights, the sensible-seeming response is to protect sleep: go to bed earlier, stay in bed longer, cancel plans, try harder. Each of these reliably makes chronic insomnia worse. Spending ten hours in bed to capture six hours of sleep dilutes your sleep drive across a longer window and trains your brain to associate the bed with lying awake.
Simultaneously, the bedroom becomes a cue for frustration rather than sleep — which is why so many people with insomnia fall asleep instantly on the sofa and become wide awake the moment they get into bed. That’s not a quirk; it’s conditioning, and it’s reversible.
CBT-I: the first-line treatment (Evidence: Strong)
The American College of Physicians clinical practice guideline recommends that all adults with chronic insomnia disorder receive CBT-I as the initial treatment. That is a strong recommendation, based on moderate-quality evidence — meaning the guideline authors considered the benefits to clearly outweigh the harms.
Two points from the guideline are worth stating plainly. First, evidence directly comparing CBT-I against sleeping medication head-to-head is insufficient — so claims that one definitively beats the other on effectiveness overstate the data. Second, CBT-I is nonetheless preferred because it is likely to cause fewer harms, since sleep medications carry meaningful adverse effects. The guideline suggests medication be considered through shared decision-making with a clinician if CBT-I alone doesn’t succeed.
The durability advantage is the practical one: CBT-I teaches skills that continue working after treatment stops, whereas medication effects generally end when the medication does.
The five components of CBT-I
CBT-I is a structured programme, usually 4–8 sessions, combining:
- Sleep restriction therapy. Counter-intuitively, you temporarily reduce time in bed to match the sleep you’re actually getting, concentrating sleep drive and rebuilding sleep efficiency. Time in bed expands as sleep consolidates. This is often the most effective component — and should be done with guidance, since it causes temporary daytime sleepiness and isn’t suitable for everyone.
- Stimulus control. Rebuilding the bed–sleep association: bed is for sleep and sex only; if you’re awake and frustrated for roughly 20 minutes, get up, do something calm in dim light, return when sleepy.
- Cognitive therapy. Addressing the beliefs that drive night-time arousal — catastrophising about tomorrow, monitoring the clock, the conviction that you must get eight hours or the day is ruined.
- Sleep hygiene education. The familiar advice about caffeine, alcohol, light, and a consistent schedule. Useful as support — but on its own, sleep hygiene is not an effective treatment for chronic insomnia, which is why generic tip lists so often disappoint.
- Relaxation training. Techniques such as progressive muscle relaxation or breathing exercises to reduce physiological arousal.
For the behavioural techniques that overlap with the first two components, our guide on how to fall asleep faster covers the practical mechanics.
How to access CBT-I
Availability of trained therapists is the main barrier, and it’s a real one. Options in rough order of evidence strength:
| Route | What it is | Evidence | Practical note |
|---|---|---|---|
| In-person or telehealth CBT-I | A trained behavioural sleep medicine clinician | Reference standard | Ask your doctor for a referral. Availability is the main barrier. |
| Digital CBT-I programmes | Structured app or web-based course | Encouraging | Dramatically improves access. A programme that only offers sleep tips is not CBT-I. |
| Self-guided workbooks | Books and printed programmes | Lowest | Lower cost, needs more discipline. Sleep restriction benefits from oversight. |
Whichever route, the marker of genuine CBT-I is that it includes sleep restriction and stimulus control — not just education.
Where medication fits
Medication is not forbidden — it’s sequenced second. Per the ACP guideline, it enters the conversation when CBT-I alone hasn’t worked, and the decision should be made jointly with a clinician weighing your circumstances against the known harms.
Important
Never start, stop, or change a prescription sleep medication without medical advice.
What about supplements? (Evidence: Limited)
Supplements sit well below CBT-I in the evidence hierarchy for chronic insomnia. Melatonin is best understood as a circadian timing signal — genuinely useful for jet lag and shifted sleep schedules, considerably less so for classic chronic insomnia. Magnesium shows small effects on how quickly people fall asleep, on low-quality evidence; we cover that honestly in our guide to magnesium for sleep.
If you have chronic insomnia, trying supplements before CBT-I means postponing the intervention with the strongest guideline support.
When to see a doctor
When to see a doctor
Book an appointment if insomnia has persisted beyond three months, if it’s affecting your work, mood, or driving safety, or if you suspect another condition is involved — particularly loud snoring with pauses in breathing or gasping (possible sleep apnoea), uncomfortable leg sensations at night (possible restless legs), or persistent low mood and anxiety.
Seek help promptly if you are falling asleep unintentionally during the day, especially while driving, or if sleeplessness is accompanied by thoughts of harming yourself.
Common questions
How long does CBT-I take to work?
Most programmes run 4–8 sessions over several weeks. Many people notice improvement within 2–4 weeks, though sleep restriction commonly makes daytime sleepiness worse before it gets better.
Is insomnia caused by anxiety?
They frequently occur together and each worsens the other, but insomnia is not simply a symptom of anxiety. It often needs treatment in its own right, and treating it can improve mood outcomes too.
Will I ever sleep normally again?
Chronic insomnia responds well to treatment, and CBT-I’s benefits tend to hold after the programme ends. Occasional bad nights remain normal for everyone — the goal is that they stop turning into patterns.
Does everyone need eight hours?
No. Adult sleep need varies, commonly around seven to nine hours. Rigidly chasing a specific number is itself a documented driver of insomnia-related anxiety.
Can I do CBT-I while taking sleeping pills?
Often yes, and many people taper medication with clinical supervision as CBT-I skills take hold. Don’t adjust a prescription on your own.
The takeaway
The takeaway
Chronic insomnia is one of the few common health problems with a clear, guideline-backed first-line treatment that most people have never heard of. If your sleep problems have lasted three months or more, the highest-value action is pursuing CBT-I — not another supplement, not another tip list, and not, as a first step, a prescription. Talk to your doctor about a referral or a credible digital programme. More guides in our Sleep Health hub, or browse all articles.
This article is for educational and informational purposes only and is not medical advice. Insomnia can be linked to other medical and mental health conditions — consult a qualified healthcare professional for diagnosis and treatment, and never start, stop, or change prescription medication without medical guidance. Read about how we review content.
References
- Qaseem A, et al. Management of Chronic Insomnia Disorder in Adults: A Clinical Practice Guideline From the American College of Physicians. Ann Intern Med. 2016. acpjournals.org
- ACP — ACP Recommends Cognitive Behavioral Therapy as Initial Treatment for Chronic Insomnia. acponline.org
- Sleep Foundation — Cognitive Behavioral Therapy for Insomnia (CBT-I): How It Works. sleepfoundation.org