Around one third of UK adults report regular sleep difficulties. Inadequate sleep is not just an inconvenience — it’s associated with increased risk of obesity, type 2 diabetes, cardiovascular disease, depression, and reduced immune function. Getting sleep right is one of the highest-return investments in your health.
What Is Insomnia?
Insomnia is difficulty falling asleep, staying asleep, or waking too early — occurring at least 3 nights per week and causing daytime impairment. Acute insomnia (days to weeks) is usually triggered by stress, illness, or life changes. Chronic insomnia (more than 3 months) often involves a complex interplay of conditioned arousal, anxious pre-sleep thinking, and perpetuating behaviours.
Understanding Your Sleep Architecture
A typical night involves 4–5 sleep cycles of 90 minutes each, moving through light NREM sleep, deep NREM sleep (slow-wave sleep — physically restorative), and REM sleep (emotionally restorative, memory consolidation). Deep sleep predominates earlier in the night; REM sleep later. This is why cutting 2 hours off the end of a sleep is disproportionately harmful — you lose mostly REM, which is critical for emotional processing and learning.
Sleep Hygiene: The Foundation
Consistent sleep-wake times — including weekends. Your circadian clock regulates sleep pressure, and irregular timing disrupts it profoundly. This is the single most impactful sleep hygiene measure. Light exposure: bright light in the morning anchors the circadian rhythm forward; avoid bright screens and artificial light in the 2 hours before bed (or use blue-light blocking glasses). Temperature: core body temperature must drop to initiate sleep; keep bedrooms cool (16–19°C is optimal). Avoid caffeine after 2pm — caffeine’s half-life is 5–6 hours, meaning half is still in your system 5 hours later. Limit alcohol — alcohol suppresses REM sleep and causes fragmented sleep in the second half of the night. Worry time: allocate 20 minutes in the early evening to write down concerns and next steps — prevents rumination at bedtime.
CBT-I: The Most Effective Treatment
Cognitive Behavioural Therapy for Insomnia (CBT-I) is the first-line treatment recommended by NICE — more effective than sleeping pills long-term. It addresses the conditioned arousal and anxiety that maintains chronic insomnia. Available via the NHS, private therapists, or digital apps (Sleepio has the strongest evidence base among apps). Key components: stimulus control (use the bed only for sleep and sex), sleep restriction (temporarily reduce time in bed to build sleep pressure), and cognitive restructuring.
OTC Sleep Aids
Antihistamine-based sleep aids (diphenhydramine: Nytol One-A-Night, Dreemon; promethazine: Sominex) work by blocking H1 receptors, causing drowsiness as a side effect. Effective for occasional sleeplessness (1–2 nights). Tolerance develops rapidly — effects diminish with repeated use within days. The “hangover” effect (residual drowsiness the next day) is a significant limitation, particularly in older adults. Not suitable for those with urinary retention, glaucoma, or on other sedating medicines. Melatonin: available OTC in the UK (Boots Sleep Melatonin). Most useful for circadian rhythm disruption (jet lag, shift work) rather than general insomnia. Low doses (0.5–2mg) taken 30 minutes before the target sleep time are as or more effective than higher doses. Prescription-only melatonin (Circadin 2mg) for those over 55 has better clinical backing.
Browse Sleep Aids and Temporary Insomnia treatments at Huncoat Pharmacy. Related: Gut Health Guide.
At Huncoat Pharmacy: Browse sleep aids, Pharmacy First, Private prescription service.