# Understanding & Managing Insomnia **Prepared by:** Pedro Cheung MD **Last Updated:** May 2026 ## A Patient Handout: Lifestyle Changes, OTC Sleep Aids & Supplements --- > **Note:** This handout is for educational purposes only. Always talk with your doctor or healthcare provider before starting any new supplement, OTC medication, or making significant lifestyle changes — especially if you have other health conditions or take prescription medications. --- ## What Is Insomnia? Insomnia is difficulty falling asleep, staying asleep, or waking too early — even when you have enough time and opportunity to sleep — that leaves you feeling unrefreshed and impairs how you function during the day. - **Short-term insomnia** lasts a few days to a few weeks, usually triggered by stress or a life event. - **Chronic insomnia** means sleep problems at least 3 nights a week for 3 months or longer. About 30% of adults experience some insomnia symptoms, and 5–15% meet the full criteria for chronic insomnia disorder. --- ## Part 1: The #1 Treatment — Cognitive Behavioral Therapy for Insomnia (CBT-I) Before supplements or medications, it is important to know that **CBT-I is the first-line, most effective treatment for chronic insomnia**, recommended by the American Academy of Sleep Medicine (AASM), the American Academy of Family Physicians, and sleep medicine guidelines worldwide. It works as well as — or better than — sleep medications, without the side effects or dependency risks. CBT-I is a structured program (usually 4–8 sessions) that combines five key strategies: |Component|What It Involves| |---|---| |**Sleep Restriction**|Temporarily limiting time in bed to match your actual sleep time, then gradually increasing it| |**Stimulus Control**|Training your brain to associate the bed only with sleep and sex| |**Cognitive Restructuring**|Identifying and changing unhelpful thoughts and worries about sleep| |**Relaxation Therapy**|Progressive muscle relaxation, deep breathing, mindfulness| |**Sleep Hygiene**|Healthy habits and environment changes| **How to access CBT-I:** - Ask your doctor for a referral to a behavioral sleep medicine specialist - Online platforms: _Sleepio_, _SHUTi_, _Somryst_ (FDA-cleared digital CBT-I program) - Find therapists at the [Society of Behavioral Sleep Medicine](https://www.behavioralsleep.org/) or the [American Board of Sleep Medicine](https://www.absm.org/) --- ## Part 2: Lifestyle Changes These are the foundation of better sleep. The evidence is strongest for these changes, and they should be implemented before or alongside any supplement or medication. ### 🕐 1. Keep a Consistent Sleep Schedule **What to do:** Go to bed and wake up at the same time every day — even on weekends. This is one of the most impactful changes you can make. **Why it works:** Your body has an internal clock (circadian rhythm). Irregular sleep times confuse it, making it harder to fall and stay asleep. A stable wake time is especially important — it anchors your body clock. **Tips:** - Set a fixed wake time first, and stick to it even if you slept poorly - Avoid sleeping in more than 30–60 minutes on weekends - Use an alarm if needed until the pattern becomes natural --- ### 📵 2. Limit Screens Before Bed (Light Hygiene) **What to do:** Stop using phones, tablets, computers, and televisions at least 60–90 minutes before bedtime. **Why it works:** The blue light emitted by screens suppresses melatonin production — the hormone that signals your brain it's time to sleep. It also keeps your brain mentally activated. **Tips:** - Switch to "Night Shift" or "Night Mode" on devices after sunset if you must use them - Replace screen time with reading (a physical book), light stretching, or a relaxing bath - Keep your bedroom free of TVs and phones when possible --- ### 🛏️ 3. Use Your Bed Only for Sleep (and Sex) **What to do:** Do not watch TV, scroll your phone, work, eat, or lie awake worrying in bed. **Why it works:** Stimulus control therapy re-trains your brain to associate the bed with sleepiness — not wakefulness, anxiety, or stimulation. Over time, getting into bed triggers drowsiness rather than alertness. **Tips:** - If you can't fall asleep in ~20 minutes, get out of bed and do something quiet in dim light until you feel sleepy, then return - Avoid lying in bed awake stressing about sleep --- ### 🌡️ 4. Optimize Your Sleep Environment **What to do:** Make your bedroom cool, dark, and quiet. **Why it works:** Your core body temperature naturally drops during sleep. A cool room (ideally **65–68°F / 18–20°C**) supports this. Light and noise disrupt sleep architecture. **Tips:** - Use blackout curtains or a sleep mask - Use earplugs or a white noise machine to block disruptive sounds - Keep electronics and work materials out of the bedroom - Consider a fan for both air circulation and white noise --- ### 🏃 5. Get Regular Physical Exercise **What to do:** Aim for at least 150 minutes of moderate-intensity exercise per week (e.g., brisk walking, cycling, swimming). Avoid vigorous exercise within 4 hours of bedtime. **Why it works:** Exercise improves sleep quality, reduces time to fall asleep, and increases deep (slow-wave) sleep. For adults over 65, combining muscle endurance training with walking shows the best results for sleep. **Tips:** - Morning or early afternoon exercise tends to be most beneficial for sleep - Even a daily 20–30 minute walk can make a difference - Yoga and tai chi have also shown sleep benefits and are gentler options --- ### ☕ 6. Manage Caffeine, Alcohol & Nicotine #### Caffeine **What to do:** Stop caffeine intake at least **6 hours before bedtime** (some sensitive individuals need 8–10 hours). **Why it works:** Caffeine blocks adenosine receptors — adenosine is the chemical that builds up during the day and creates "sleep pressure." Caffeine's half-life is 5–7 hours, meaning it stays active in your body for many hours. **Sources to watch:** Coffee, tea, energy drinks, sodas, dark chocolate, some pain relievers (Excedrin), pre-workout supplements. #### Alcohol **What to do:** Avoid alcohol within 3–4 hours of bedtime, and limit overall consumption. **Why it works:** Alcohol is a sedative, so it may help you fall asleep initially — but it fragments sleep in the second half of the night, suppresses REM sleep, and causes early morning waking. It is not a safe or effective sleep aid. #### Nicotine **What to do:** Avoid nicotine (cigarettes, vaping, patches) close to bedtime. **Why it works:** Nicotine is a stimulant. It raises heart rate and alertness, making it harder to fall asleep. Nicotine withdrawal during the night can also cause waking. --- ### 🍽️ 7. Watch What You Eat and Drink at Night **What to do:** - Avoid large, heavy, or spicy meals within 2–3 hours of bedtime - Limit fluids in the 2 hours before bed to reduce nighttime bathroom trips - A light, sleep-supportive snack is okay if hungry (e.g., a small bowl of oatmeal, a banana, or a handful of walnuts) **Why it works:** Digestion, heartburn, and blood sugar fluctuations can disrupt sleep. Some foods contain natural sleep-supporting nutrients (like tryptophan in turkey and dairy, or magnesium in nuts and leafy greens). --- ### 😌 8. Build a Relaxing Pre-Sleep Routine **What to do:** Create a consistent 30–60 minute wind-down routine before bed. **Ideas:** - A warm bath or shower (the cooling of your body afterward promotes drowsiness) - Light reading - Gentle stretching or yoga - Deep breathing exercises (e.g., 4-7-8 breathing: inhale 4 sec, hold 7 sec, exhale 8 sec) - Progressive muscle relaxation: tense and release muscle groups from feet to head - Journaling or a "worry dump" — write down tomorrow's to-do list and concerns to clear your mind --- ### 💡 9. Manage Stress and Anxiety **What to do:** Address the mental/emotional drivers of insomnia. **Options:** - **Mindfulness meditation:** Apps like _Headspace_, _Calm_, or _Insight Timer_ offer guided sleep meditations; mindfulness-based stress reduction (MBSR) programs show meaningful benefit - **Journaling:** Write down worries and plans before bed to offload mental activity - **Therapy:** Cognitive behavioral therapy (CBT) for anxiety and depression, which often coexist with insomnia - **Scheduled "worry time":** Set aside 15–20 minutes earlier in the day to write down concerns so they don't invade bedtime --- ### ☀️ 10. Get Morning Light Exposure **What to do:** Get 10–30 minutes of natural outdoor light exposure within an hour of waking up. **Why it works:** Morning light is the most powerful signal for resetting your circadian clock. It suppresses residual melatonin, boosts alertness, and ensures your body clock is properly timed for sleepiness at night. **Tips:** - Go for a morning walk or have your coffee outside - If natural light is unavailable (winter months, shift work), consider a 10,000-lux light therapy box used for 20–30 minutes in the morning --- ### 😴 11. Limit or Eliminate Naps **What to do:** Avoid napping, or limit naps to **20–30 minutes before 3:00 PM**. **Why it works:** Napping reduces your "sleep pressure" (adenosine buildup) during the day, making it harder to fall asleep at your target bedtime. Short, early naps are less disruptive. --- ## Part 3: Over-the-Counter (OTC) Medications ### ⚠️ Important Cautions About All OTC Sleep Aids - OTC sleep aids are intended for **short-term use only** (generally no more than 2 weeks) - They **do not fix the underlying cause** of insomnia - Tolerance (reduced effectiveness) can develop quickly — often within days - They are **not a substitute** for lifestyle changes or CBT-I - **Always talk to your doctor** before using these, especially if you are elderly, pregnant, have kidney/liver disease, prostate problems, glaucoma, or take other medications --- ### Antihistamine-Based OTC Sleep Aids These are the most widely available OTC sleep medications. They work by blocking histamine — a wakefulness-promoting brain chemical. #### Diphenhydramine (Benadryl, ZzzQuil, Unisom SleepTabs, Nytol) |Detail|Information| |---|---| |**Typical dose**|25–50 mg at bedtime| |**How it works**|Blocks histamine H1 receptors, causing sedation| |**Onset**|~30 minutes to 1 hour| |**Duration**|4–8 hours| |**Common side effects**|Daytime drowsiness ("hangover"), dry mouth, urinary retention, blurred vision, constipation, confusion| |**Tolerance**|Develops within 2–3 nights of regular use| |**AASM recommendation**|**Not recommended** for chronic insomnia due to lack of lasting evidence and side effect profile| > **Special caution:** Diphenhydramine is particularly problematic for **older adults** (age 65+). It is on the Beers Criteria list of medications to avoid in the elderly because it can impair cognition, increase fall risk, and cause confusion. Avoid if possible. #### Doxylamine (Unisom SleepTabs — the original formula, Nighttime Sleep Aid) |Detail|Information| |---|---| |**Typical dose**|25 mg at bedtime| |**How it works**|Antihistamine, similar to diphenhydramine but somewhat longer-acting| |**Evidence**|Slightly better than diphenhydramine; some evidence supports up to 4 weeks of use| |**Side effects**|Similar to diphenhydramine; next-day grogginess is common| |**AASM recommendation**|Listed as having some short-term support (up to 4 weeks) in 2024 AAFP guidelines| > ⚠️ **Avoid in adults age 65 and older.** Like diphenhydramine, doxylamine is an anticholinergic antihistamine listed on the **American Geriatrics Society Beers Criteria** of medications potentially inappropriate for older adults. Risks in this age group include cognitive impairment/confusion, increased fall and fracture risk, urinary retention (especially in men with enlarged prostate), prolonged next-day sedation (due to slower drug clearance), and occasionally paradoxical agitation. For older adults needing pharmacologic support, **low-dose melatonin (0.5 mg)** is the preferred OTC option per AAFP 2024 guidelines. > **Tip:** Check labels carefully — some "Unisom" products contain diphenhydramine and others contain doxylamine. They are different drugs. --- ## Part 4: Supplements & Natural Remedies The research landscape for sleep supplements is mixed. Most have modest effects at best and work better for certain types of sleep problems. None are approved by the FDA to treat insomnia. Quality control and purity vary widely between brands. **Look for products with third-party testing certifications** such as: - **USP Verified** (United States Pharmacopeia) - **NSF Certified** - **ConsumerLab.com Approved** --- ### 🌙 1. Melatonin **What it is:** A hormone naturally produced by your pineal gland that signals your body it is nighttime. **Best use:** Melatonin is most effective for **circadian rhythm problems** — jet lag, shift work, delayed sleep phase syndrome (night owls who can't fall asleep until very late). It helps most with **falling asleep faster**, not necessarily staying asleep. **Dosing guidance:** - Start very low: **0.5–1 mg** is often as effective as higher doses - Take **30–60 minutes before your target bedtime** (timing matters as much as dose) - For older adults (55+), melatonin may have more clear benefit; the AAFP 2024 guidelines suggest considering it as a first-line option in this age group, starting at **0.5 mg** - OTC products in the US commonly contain **5–10 mg**, but this is far higher than physiologically necessary; research suggests lower doses (0.5–3 mg) are effective **What the research says:** - A 2013 meta-analysis of 19 trials found melatonin reduced sleep onset latency by about **7 minutes** and increased total sleep time by about **8 minutes** — modest but statistically significant - Most beneficial for difficulty falling asleep; less helpful for sleep maintenance (middle-of-the-night waking) - For **primary chronic insomnia in adults**, the AASM recommends against routine use, citing limited evidence - Generally **very safe** for short-term use; long-term safety beyond a few months is not well established **Important caveats:** - OTC melatonin products are **not FDA-regulated** — studies have found actual melatonin content in supplements can range from 83% below to 478% above the labeled dose - Side effects are generally mild: daytime drowsiness, headache, dizziness - Avoid driving or heavy machinery after taking melatonin --- ### 🌿 2. Valerian Root (_Valeriana officinalis_) **What it is:** An herbal extract from valerian plant roots, commonly marketed as a natural sleep remedy. It is thought to act on GABA receptors in the brain. **What the research says:** - An umbrella review of 8 systematic reviews (2024) concluded there is **no evidence of efficacy for treating insomnia** with objective measurements, though some people report _subjective_ improvements in sleep quality - The European Sleep Research Society's clinical guideline does **not recommend** phytotherapeutics (including valerian) for insomnia treatment - The AASM also suggests **clinicians not use valerian** as treatment for insomnia **Safety:** Generally considered safe at standard doses. There are rare case reports of liver toxicity at very high or prolonged doses. May interact with sedative medications, alcohol, and some antidepressants. **Bottom line:** May offer mild subjective benefit for some people; evidence for objective sleep improvement is weak. Low risk if used short-term at recommended doses. **Typical dose if trying:** 300–600 mg of standardized extract taken 30–60 minutes before bed. --- ### 💊 3. Magnesium **What it is:** An essential mineral involved in hundreds of body processes. Magnesium plays a role in GABA activity and nervous system regulation — both important for sleep. **What the research says:** - A 2021 systematic review of 3 RCTs found magnesium supplementation reduced sleep onset latency by about **17 minutes** in older adults, though total sleep time improvement was not statistically significant; evidence was rated low to very low quality - A 2025 randomized controlled trial of **magnesium bisglycinate** (250 mg/day) found modest but statistically significant improvements in insomnia severity scores vs. placebo (effect size was small, Cohen's d = 0.2) in adults with self-reported poor sleep quality - Benefits appear most pronounced in individuals who may have low magnesium intake from their diet **Preferred forms:** Not all magnesium supplements are equal for sleep. Choose: - **Magnesium glycinate** (magnesium bisglycinate) — well-absorbed, gentle on stomach, most studied for sleep - **Magnesium L-threonate** — crosses the blood-brain barrier; emerging evidence shows benefits for sleep quality and mood; typical dose is 1 g/day - **Magnesium citrate** — good absorption, but may have laxative effect at higher doses - ❌ **Avoid magnesium oxide** for sleep — poorly absorbed and mainly acts as a laxative **Typical dose:** 200–400 mg elemental magnesium at bedtime (start at 200 mg) **Safety:** Generally safe. High doses can cause diarrhea or GI upset. Avoid doses above 350 mg/day from supplements if you have kidney disease. May interact with certain antibiotics, diuretics, and medications for heart conditions. --- ### 🍵 4. L-Theanine **What it is:** A naturally occurring amino acid found in green tea leaves (_Camellia sinensis_). It promotes relaxation without sedation by modulating GABA, serotonin, and dopamine activity. **What the research says:** - A 2025 systematic review of 13 trials found that **200–450 mg/day** of L-theanine safely and effectively supported sleep in adults — with benefits in sleep latency, sleep maintenance, sleep efficiency, and waking refreshment - A 2025 meta-analysis of 18 RCTs (897 participants) confirmed L-theanine significantly improved subjective sleep onset latency, daytime dysfunction, and overall sleep quality scores - It may work particularly well **combined with other sleep-supporting compounds** (e.g., magnesium, GABA, glycine) **Typical dose:** **200–400 mg** taken 30–60 minutes before bedtime **Safety:** Excellent safety profile; no significant adverse events reported in clinical trials. It does not cause sedation and does not impair cognitive function. Non-habit-forming. **Bottom line:** One of the better-supported OTC supplements for sleep, with consistently positive findings across multiple high-quality trials. --- ### 🌸 5. Passionflower, Lemon Balm & Lavender (GABA-Active Herbs) **What they are:** Herbal remedies long used for anxiety and sleep, all thought to act on the GABA pathway in the brain. **What the research says:** - A 2021 systematic review found that valerian, passionflower, lemon balm, lavender, and California poppy all demonstrated some reduction in sleep latency and improvement in subjective sleep quality - Evidence is preliminary and largely from small studies, but the safety profile is generally good - **Lavender (oral capsules — e.g., Silexan, 80 mg):** Has the most clinical trial evidence among herbal remedies; shown to reduce anxiety and improve sleep quality in some European trials **Safety:** Generally low risk at recommended doses. Lemon balm may interact with sedative medications and thyroid medications. Passionflower may interact with blood thinners (warfarin). Consult your doctor if you are on any medications. --- ### 🍒 6. Tart Cherry Juice / Tart Cherry Extract **What it is:** Tart cherries (Montmorency variety) are one of the few dietary sources of naturally occurring melatonin, along with anti-inflammatory compounds. **What the research says:** - Small studies suggest 8 oz of tart cherry juice twice daily (or equivalent extract) may modestly increase melatonin levels, reduce insomnia severity, and slightly increase total sleep time (by ~30–84 minutes in some studies) - A nutrition study including tart cherry in a multi-ingredient sleep blend found reductions in sleep onset latency and increases in total sleep time **Typical dose:** 8 oz (240 mL) of 100% tart cherry juice, or 480 mg of tart cherry extract, taken 30–60 minutes before bed **Safety:** Very safe as a food. Be aware that cherry juice contains natural sugars — not ideal in large amounts for people with diabetes. --- ### 🧪 7. GABA (Gamma-Aminobutyric Acid) **What it is:** The brain's primary inhibitory neurotransmitter; helps "calm" neural activity. **What the research says:** - Oral GABA supplements may have some modest effect on sleep onset and subjective sleep quality; effect sizes are generally small - It is unclear how much orally ingested GABA crosses the blood-brain barrier in humans - Some studies combine GABA with L-theanine, finding synergistic effects on relaxation **Typical dose:** 100–300 mg at bedtime **Safety:** Generally well tolerated; mild drowsiness. Lacks the same level of evidence as L-theanine or melatonin. --- ### 🥛 8. Glycine **What it is:** A non-essential amino acid that acts as an inhibitory neurotransmitter in the brainstem and spinal cord, and may lower core body temperature — a key driver of sleep onset. **What the research says:** - Small RCTs suggest **3 g of glycine before bed** can reduce time to fall asleep, improve sleep quality, and reduce daytime fatigue — especially in those who feel unrested - Often included in multi-ingredient sleep supplements (combined with magnesium, L-theanine, or tart cherry) **Typical dose:** 3 g (3,000 mg) taken 30–60 minutes before bedtime **Safety:** Very safe; no significant adverse effects at standard doses. Also found naturally in collagen supplements. --- ## Part 5: What NOT to Use for Sleep ### ❌ Alcohol Despite its sedating effects, alcohol **worsens sleep quality** overall. It suppresses deep and REM sleep, causes fragmented sleep, and leads to early morning waking. Avoid using alcohol as a sleep aid. ### ❌ OTC Antihistamines Long-Term Tolerance builds rapidly. The AASM advises against diphenhydramine for chronic insomnia. Particularly harmful for older adults. ### ❌ Sleeping Through the Weekend ("Sleep Banking") You cannot meaningfully "pay back" a sleep debt with a weekend sleep-in. Irregular schedules worsen insomnia. --- ## Part 6: Quick-Reference Summary ### Lifestyle Changes (Most Important — Do These First) |Change|Priority| |---|---| |Keep a consistent wake time every day|⭐⭐⭐⭐⭐| |Stop screens 60–90 min before bed|⭐⭐⭐⭐⭐| |Use bed only for sleep/sex|⭐⭐⭐⭐⭐| |Cool, dark, quiet bedroom|⭐⭐⭐⭐| |Exercise regularly (not within 4 hrs of bed)|⭐⭐⭐⭐| |No caffeine after 12–2 PM|⭐⭐⭐⭐| |Wind-down routine 30–60 min before bed|⭐⭐⭐⭐| |Morning sunlight exposure|⭐⭐⭐⭐| |Limit/eliminate alcohol|⭐⭐⭐⭐| |Mindfulness/stress management|⭐⭐⭐| |Limit naps (max 20 min before 3 PM)|⭐⭐⭐| ### Supplements: Evidence Snapshot |Supplement|Typical Dose|Evidence Strength|Best For| |---|---|---|---| |**L-Theanine**|200–400 mg at bedtime|✅ Moderate-strong|Sleep onset, quality, daytime function| |**Melatonin**|0.5–3 mg at bedtime|✅ Moderate (timing-related sleep)|Falling asleep, jet lag, circadian issues| |**Magnesium glycinate**|200–400 mg at bedtime|✅ Modest|Sleep onset latency, relaxation| |**Glycine**|3,000 mg at bedtime|✅ Modest|Sleep quality, daytime fatigue| |**Tart cherry**|8 oz juice or 480 mg extract|✅ Modest|Sleep duration, natural melatonin boost| |**Passionflower / Lemon balm**|Per product label|⚠️ Limited|Mild anxiety + sleep| |**Valerian**|300–600 mg at bedtime|⚠️ Weak/inconclusive|Subjective sleep quality only| |**GABA**|100–300 mg at bedtime|⚠️ Limited|Relaxation, sleep onset| ### OTC Medications: Quick Summary |Medication|Dose|Use|Caution| |---|---|---|---| |**Doxylamine** (Unisom)|25 mg at bedtime|Short-term sleep onset/maintenance (up to 4 weeks)|Next-day grogginess; avoid in elderly| |**Diphenhydramine** (ZzzQuil, Benadryl)|25–50 mg at bedtime|Short-term only (2–3 nights max)|Rapid tolerance; avoid in elderly| --- ## Part 7: When to See a Doctor Talk to your healthcare provider if: - Insomnia has lasted more than 3–4 weeks - You wake up gasping, snoring loudly, or are told you stop breathing in your sleep (possible sleep apnea) - You have a strong urge to move your legs at night (possible restless legs syndrome) - Your insomnia is related to pain, anxiety, depression, or another medical condition - You have tried lifestyle changes for 4–6 weeks without improvement - You want to try CBT-I or need a referral to a sleep specialist **Seek immediate care** if you are experiencing thoughts of self-harm or hopelessness related to sleep deprivation. --- ## Key Resources |Resource|Link| |---|---| |National Sleep Foundation|[sleepfoundation.org](https://www.sleepfoundation.org/)| |American Academy of Sleep Medicine|[sleepeducation.org](https://sleepeducation.org/)| |Society of Behavioral Sleep Medicine (Find a CBT-I provider)|[behavioralsleep.org](https://www.behavioralsleep.org/)| |Somryst (FDA-cleared digital CBT-I)|[somryst.com](https://www.somryst.com/)| |Sleep Diary Template (AASM)|[aasm.org/sleep-diary](https://aasm.org/clinical-resources/patient-information/patient-brochures/)| |Sleepio (Digital CBT-I)|[sleepio.com](https://www.sleepio.com/)| |CDC Sleep & Health|[cdc.gov/sleep](https://www.cdc.gov/sleep/index.html)| --- _This handout was prepared using evidence from the American Academy of Sleep Medicine (AASM), American Academy of Family Physicians (AAFP) 2024 Clinical Practice Guidelines, Mayo Clinic, and peer-reviewed research from journals including the Journal of Clinical Sleep Medicine, Sleep Medicine Reviews, and Nutrients._ --- _Last updated: May 2026_