What Makes a Treatment Effective for Chronic Insomnia?

Chronic insomnia is defined as difficulty falling asleep, staying asleep, or waking too early, occurring at least three nights per week for at least three months, causing significant daytime distress or impairment 1. It is not primarily a disease — it is a learned pattern maintained by a combination of conditioned arousal, unhelpful beliefs about sleep, and sleep-effort behaviours.

This is why the most effective treatments address the maintaining mechanisms rather than the symptoms alone. A treatment that suppresses wakefulness tonight without addressing the underlying conditioning does not produce lasting change 2.

First-Line Treatments: The Evidence-Based Options

Cognitive Behavioural Therapy for Insomnia (CBT-I)

CBT-I is the most researched and most strongly recommended treatment for chronic insomnia. It is recommended as the first-line treatment by NICE 3, NHS England, the American Academy of Sleep Medicine 12, and the European Sleep Research Society 2.

CBT-I typically consists of four to eight sessions and includes the following components:

Stimulus control therapy restores the association between bed and sleep by restricting bed use to sleep only, removing wakefulness cues from the bedroom, and maintaining a consistent wake time. It is one of the most consistently effective single components across trials 5.

Sleep consolidation (sleep restriction therapy) temporarily limits time in bed to match actual sleep time, creating strong sleep pressure. This component produces the fastest improvements in sleep quality and efficiency, though it can feel demanding initially and works best with personalised guidance 5.

Cognitive restructuring identifies and challenges the beliefs that maintain hyperarousal: “I need 8 hours,” “I cannot function on less,” “My insomnia is permanent.” These beliefs generate the threat-monitoring that prevents sleep 6.

Relaxation techniques reduce the somatic arousal — physical tension, racing heart rate — that accompanies insomnia through progressive muscle relaxation, diaphragmatic breathing, and related approaches 5.

A systematic review and meta-analysis of 87 randomised controlled trials found CBT-I produces clinically significant improvements in how long it takes to fall asleep, wakefulness in the night and sleep efficiency, with effects maintained at 12 months 7.

Acceptance and Commitment Therapy for Insomnia (ACT-I)

ACT-I is an evidence-based alternative and complement to CBT-I, closely related to mindfulness-based approaches to insomnia, and particularly effective for people with significant sleep anxiety or those for whom CBT-I was too rigid or anxiety-provoking 8.

ACT-I targets the relationship with wakefulness rather than sleep behaviours directly. Its core insight is that the struggle against wakefulness generates more arousal than the wakefulness itself 9. It uses acceptance to reduce resistance to wakefulness, cognitive defusion to interrupt the arousal triggered by anxious sleep thoughts, values clarification to reconnect with meaningful daytime activity, and committed action to re-engage with life regardless of sleep quality.

A 2014 randomised controlled trial of mindfulness-based therapy for insomnia — which shares ACT-I’s core emphasis on changing one’s relationship with wakefulness rather than fighting it — found significant reductions in Insomnia Severity Index scores maintained at six months 8.

Integrated CBT-I and ACT-I

The most comprehensive approach combines both frameworks: CBT-I’s behavioural tools (stimulus control, sleep consolidation) with ACT-I’s psychological tools (acceptance, defusion, values). Tracy Hannigan uses this integrated approach in the Sleep Reboot and Sleep Reframe programmes, selecting and sequencing techniques based on what is maintaining each person’s insomnia. This integration is clinically indicated when both behavioural and psychological maintaining factors are present — the case for the majority of people with chronic insomnia.

Digital Programmes: Sleepio and Sleepstation

Digital CBT-I programmes provide an accessible option for mild-to-moderate insomnia.

Sleepio is a digital CBT-I programme developed by Professor Colin Espie at the University of Oxford and available free through some NHS trusts and employers. It is fully automated with no human therapist contact. One published randomised, placebo-controlled trial found sustained improvements in sleep efficiency and daytime functioning compared with both an active placebo condition and treatment-as-usual 10.

Sleepstation is a UK-based digital CBT-I programme with some team oversight, NHS-recommended, with published outcomes data.

Research consistently shows that human-guided CBT-I produces stronger outcomes than automated digital programmes, particularly for moderate-to-severe insomnia, high sleep anxiety, and people with prior CBT-I exposure 7.

Sleep Medications

Prescription Sleeping Pills

Z-drugs (zopiclone, zolpidem) and benzodiazepines reduce sleep onset latency and increase sleep duration in the short term. However, tolerance develops within two to four weeks, dependence is a significant risk, rebound insomnia occurs on stopping, and they do not address the conditioning that maintains chronic insomnia 3. NICE guidance limits prescriptions to short-term use and recommends CBT-I as the preferred treatment 3.

Daridorexant (Quviviq)

Daridorexant is a dual orexin receptor antagonist approved for use in the UK. It works by blocking wake-promoting signals rather than enhancing sedation, carries lower dependence risk, and has shown improvements in sleep in clinical trials 11. NHS access remains limited and patchy. Like other medications, it does not address the underlying conditioned arousal.

Melatonin

Prescription melatonin (Circadin) is licensed in the UK for short-term use in adults over 55 with primary insomnia. It is most effective for circadian rhythm disruption rather than the conditioned, anxiety-driven insomnia that characterises most chronic cases 4.

Why Sleep Hygiene Alone Is Insufficient

Sleep hygiene — consistent bedtimes, limiting caffeine, reducing screen use, exercising regularly — is a useful foundation for healthy sleep in people who do not yet have chronic insomnia. For established chronic insomnia (three or more months), sleep hygiene alone consistently fails to resolve the problem 7. The reason is that chronic insomnia is maintained by conditioned arousal and cognitive-emotional patterns that sleep hygiene does not address. By the time insomnia is chronic, the problem is in the conditioning, not the environment.

How to Choose the Right Treatment

Tracy Hannigan is a qualified insomnia therapist at tracythesleepcoach.co.uk. She offers CBT-I and ACT-I online through the Sleep Reboot (6 weeks) and Sleep Reframe (12 weeks) programmes, for adults with chronic insomnia throughout the UK and internationally. Book a free 20-minute call to discuss which approach is right for you.