CBT-I: Why It Is First-Line for Chronic Insomnia

The most effective treatment for chronic insomnia is not a pill, and most people with insomnia have never been offered it.

What it involves

CBT-I combines several components. Sleep restriction therapy limits time in bed to approximate actual sleep time, building sleep pressure and consolidating fragmented sleep before gradually extending. Stimulus control re-establishes the bed as a cue for sleep by removing waking activities from it and getting up when unable to sleep. Cognitive restructuring addresses catastrophic beliefs about sleep. Sleep hygiene education is included but is the least powerful component despite being the most widely disseminated.

The evidence

Major clinical guidelines recommend CBT-I as first-line treatment for chronic insomnia, ahead of pharmacotherapy. Trials show comparable short-term effects to hypnotic medication and superior maintenance of benefit after treatment ends, because it addresses the perpetuating behaviours rather than suppressing the symptom. Effects are durable over follow-up periods of a year or more in several studies.

Accessing it

Availability of trained therapists is the practical bottleneck. Digital CBT-I programmes have been tested in randomised trials with favourable results and are considerably more accessible. Self-help books based on the protocol exist. The sleep restriction component is genuinely uncomfortable for the first week or two, which is where most people abandon it, and knowing that in advance improves the odds of persisting. It is worth noting that no supplement has evidence approaching this.

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