Several options can help you fall asleep, ranging from supplements like melatonin and magnesium to over-the-counter antihistamines, herbal remedies, and prescription medications. The best choice depends on whether your sleep trouble is occasional or chronic, and the single most effective long-term treatment for ongoing insomnia isn’t a pill at all. Here’s what works, what doesn’t, and what to realistically expect from each option.
Melatonin: The Most Popular Starting Point
Melatonin is a hormone your brain naturally produces when it gets dark, signaling that it’s time to sleep. Taking it as a supplement doesn’t knock you out. Instead, it nudges your internal clock toward sleepiness, which makes it most useful when your sleep timing is off, such as jet lag, shift work, or a schedule that’s drifted too late.
For short-term sleep problems, a typical dose is 2 mg taken one to two hours before bed. For longer-term use, the same 2 mg dose taken 30 minutes to an hour before bed is a common starting point, with a maximum of 10 mg daily. Most sleep experts suggest starting low, since many store-bought melatonin products contain far more than you need. Higher doses don’t necessarily work better and can leave you groggy the next morning.
Magnesium for Calming the Nervous System
Magnesium helps with sleep through several pathways at once. It promotes muscle relaxation, dials down nerve excitability, lowers cortisol (your main stress hormone), and even supports your body’s own melatonin production. It works partly by boosting the activity of GABA, a brain chemical that quiets neural activity, while simultaneously blocking signals that keep your brain in an alert state.
The forms you’ll see recommended most often for sleep are magnesium glycinate and magnesium threonate, both widely available and relatively affordable. Magnesium oxide and citrate have also been used in sleep studies, though glycinate tends to be gentler on the stomach. If you’re not getting enough magnesium from your diet (many people aren’t), supplementing may noticeably improve your sleep quality. If your levels are already adequate, the effect will likely be modest.
L-Theanine: The Calm-Without-Drowsiness Option
L-theanine is an amino acid found naturally in green tea. It doesn’t make you sleepy directly. Instead, it increases alpha brain waves, the same pattern your brain produces during relaxed, meditative states. Taking 200 mg before bed may promote more restful sleep by helping your mind wind down. Animal studies suggest it works even better when combined with GABA supplements, with the combination helping subjects fall asleep faster and sleep longer than either one alone.
L-theanine is a reasonable option if racing thoughts or anxiety are the main thing keeping you awake, since it targets mental restlessness rather than forcing sedation.
Tart Cherry Juice: A Surprising Natural Source
Tart cherry juice has legitimate research behind it. It’s one of the few food-based sleep aids with measurable effects in clinical studies, largely because tart cherries are a natural source of melatonin and also reduce inflammation.
In one study, adults over 50 who drank 240 mL (about 8 ounces) of tart cherry juice twice daily for two weeks gained an extra 84 minutes of sleep per night and saw improved sleep efficiency. Another study found that just 30 mL of tart cherry juice daily for seven days increased total sleep time and sleep efficiency in healthy adults. A third found that a sour cherry powder supplement reduced the time it took to fall asleep by 24 minutes. Not every study shows dramatic results, but the pattern across multiple trials is consistently positive, particularly for sleep duration and falling asleep faster.
Over-the-Counter Antihistamines
Diphenhydramine (the active ingredient in Benadryl and many “PM” branded products) and doxylamine (found in Unisom SleepTabs) are the two antihistamines sold specifically as sleep aids. They block histamine, a brain chemical involved in wakefulness, which is why they make you drowsy.
The evidence for these is weaker than most people assume. Clinical studies have failed to show consistent improvements in objective sleep measures like how long it takes to fall asleep, total sleep time, or sleep efficiency. One study in older adults found diphenhydramine slightly reduced nighttime awakenings but didn’t improve sleep quality overall. More concerning, diphenhydramine at a standard 50 mg dose caused significant next-day impairment in working memory and wakefulness during both morning and afternoon hours. There’s also evidence of rebound insomnia after stopping, meaning your sleep can temporarily get worse than before you started taking it.
These products are FDA-approved as safe for occasional use, but they’re a poor choice for anything beyond a rough night here and there. Your body builds tolerance quickly, often within a few days, and the next-day grogginess can be significant.
CBN: A Newer Cannabinoid Option
CBN (cannabinol) is a cannabinoid that’s gained attention as a sleep aid, distinct from CBD. In a randomized, placebo-controlled study of nearly 300 participants, 20 mg of CBN taken nightly for seven nights significantly reduced the number of times people woke up during the night and lowered overall sleep disturbance. It did not, however, help people fall asleep faster.
Interestingly, adding CBD to CBN didn’t improve the results. And no dose combination affected next-day fatigue, which suggests CBN doesn’t cause hangover-like grogginess. If your main problem is waking up repeatedly through the night rather than falling asleep initially, CBN may be worth trying. The research is still early, though, and product quality varies widely since cannabinoid supplements aren’t tightly regulated.
Prescription Sleep Medications
If over-the-counter options aren’t working, prescription medications fall into two main categories. The older class, sometimes called Z-drugs (like zolpidem), targets the same brain receptors as anti-anxiety medications and can be habit-forming. A newer class called orexin receptor antagonists works differently, blocking the brain’s wakefulness signals rather than forcing sedation.
In head-to-head comparisons across six clinical trials, the newer orexin antagonists helped people fall asleep about 15 minutes faster than Z-drugs, while total sleep time was similar between the two. The safety differences were more striking: orexin antagonists carried a 62% lower risk of dependency and a 35% lower risk of cognitive impairment compared to Z-drugs, with less next-day drowsiness as well. If you and your doctor are considering a prescription option, these newer medications represent a meaningfully safer profile.
Combining any prescription sleep medication with alcohol is genuinely dangerous. The combination increases the risk of extreme sedation, slowed breathing, and in serious cases, death by overdose.
Behavioral Therapy Outperforms Everything Else
The American Academy of Sleep Medicine gives its strongest recommendation to cognitive behavioral therapy for insomnia (CBT-I) as the first-line treatment for chronic sleep problems. It outperforms medications in long-term effectiveness, improves symptoms with minimal side effects, and the benefits persist after treatment ends, unlike pills that only work while you’re taking them.
CBT-I typically involves 4 to 8 sessions and combines sleep restriction (counterintuitively spending less time in bed to build stronger sleep drive), stimulus control (retraining your brain to associate bed with sleep rather than wakefulness), and restructuring the anxious thoughts that fuel insomnia. It’s available through therapists, sleep clinics, and increasingly through app-based programs. If your sleep problems have lasted more than a few weeks, this is the intervention most likely to fix them permanently rather than masking them.
Matching the Right Option to Your Situation
For occasional sleeplessness tied to stress, travel, or schedule disruption, melatonin at a low dose (1 to 3 mg) taken an hour or two before bed is a reasonable first step. If you tend to lie awake with a busy mind, L-theanine or magnesium glycinate may help more than melatonin, since they address the anxiety side of sleeplessness rather than just the timing signal. Tart cherry juice is a solid option if you prefer something food-based and are willing to stick with it for at least a week or two.
Avoid relying on antihistamines beyond a night or two. The tolerance buildup, next-day impairment, and rebound insomnia make them a poor long-term strategy despite being widely available. And if your sleep problems are persistent, happening three or more nights per week for at least a month, treat the root cause through CBT-I rather than cycling through supplements. The supplements listed here can complement that process, but they rarely solve chronic insomnia on their own.