Want a cannabinoid dose you can count to the milligram? Our full-spectrum CBD soft gels are 25 mg each, 30 per bottle, for $29 $22. Shop CBD soft gels →
CBN Dosage: How Much CBN Should You Take?
Human studies of CBN (cannabinol) have used 20 mg to 300 mg per dose, and the largest trials found effects at 20 mg to 100 mg taken nightly, yet most CBN products sold for sleep contain 5 mg or less per serving. A cautious plan is to start at 5 mg, hold for 3 to 4 nights, and step up by 5 mg toward the 20 to 25 mg range that trials actually tested. There is no official dose, and nothing here is medical advice.
That gap between the shelf and the science is the whole story of CBN dosing. A 2021 review in Cannabis and Cannabinoid Research found sleep products "typically" carried ≤5 mg of CBN, well under any dose tested in a trial. Since then, three randomized trials have given people 20 mg, 25, 50 and 100 mg and 30 and 300 mg. This guide turns those numbers into a dose chart by goal, experience and format, shows the tincture math, and covers combinations with CBD and THC, side effects, drug tests and who should skip CBN entirely.
Disclosure: Diesel Hemp sells hemp-derived CBD, THC and cannabinoid products, so we have a stake in this topic. That is why every number below links to the study it came from, checked on November 9, 2026. CBN is for adults 21+.
Shop Diesel Hemp
All sales are final, except a broken vape device, which we replace. Free shipping over $75. 21+ only. We do not ship to Colorado.
CBN Dosage Chart (mg by Goal)
This chart lists what has been tested in humans, not what a label says. "Tested dose" means a dose given in a published trial; "reasonable start" is a conservative first step below it.
| Goal | Reasonable start | Tested dose in humans | What the study found |
|---|---|---|---|
| First time trying CBN | 2.5–5 mg | Not studied below 20 mg | Typical product strength is ≤5 mg (Corroon 2021) |
| Waking up during the night | 5–10 mg | 20 mg nightly, 7 nights | Fewer awakenings and less sleep disturbance than placebo (Bonn-Miller 2024) |
| Overall sleep quality | 10–25 mg | 25, 50 or 100 mg nightly, 6 weeks | All doses beat placebo; none beat 4 mg melatonin (Kolobaric 2024) |
| Falling asleep (insomnia) | Talk to a doctor | 300 mg single dose | Faster sleep onset; 30 mg did nothing measurable (Lavender 2026) |
| Stress | 10–25 mg | 100 mg nightly, 6 weeks | Larger stress drop than placebo (Kolobaric 2024) |
| Anxiety | No CBN evidence | 25–100 mg (as a secondary measure) | No difference from placebo (Kolobaric 2024) |
| Pain | No CBN evidence | 50 mg once; 25–100 mg for 6 weeks | No change in pain thresholds or pain scores (Karniol 1975; Kolobaric 2024) |
| With THC | Count the THC, not the CBN | 1 mg CBN + 10 mg THC + 0.5 mg CBD | Better insomnia scores over 2 weeks (Walsh 2021) |
"Reasonable start" values are our conservative suggestions, not trial results. Doses are per serving, taken by mouth. A 2026 review of insomnia trials summarized the CBN range found safe and effective as 20–100 mg.
What CBN Doses Have Been Tested in Humans?
Six human studies give CBN dose information: single doses from 1 mg (inside a THC blend) to 300 mg, and nightly doses of 20 mg to 100 mg for up to six weeks. No study has tested CBN alone below 20 mg, so lower "starter" doses are educated guesses, not evidence.
| Study | People | CBN dose | How long | Main result |
|---|---|---|---|---|
| Kolobaric et al., 2024, Pharmaceuticals | About 1,020 US adults 21+ who wanted better sleep (5 arms of ~200) | 25, 50 or 100 mg, vs 4 mg melatonin and placebo | 6 weeks nightly | Every CBN dose improved sleep disturbance scores vs placebo, no different from melatonin; 100 mg lowered stress; anxiety and pain unchanged |
| Bonn-Miller et al., 2024, Exp Clin Psychopharmacol | 293 adults, poor sleepers | 20 mg, alone or with 10, 20 or 100 mg CBD | 7 nights | 20 mg CBN reduced awakenings and sleep disturbance; adding CBD did not help |
| Lavender et al., 2026, J Sleep Res | 20 adults with diagnosed insomnia | 30 or 300 mg in MCT oil | 1 night each (crossover) | No change in time awake after sleep onset; 300 mg sped sleep onset and raised sleep quality; 30 mg did not |
| Walsh et al., 2021, Sleep | 23 adults with chronic insomnia | 1 mg CBN with 10 mg THC and 0.5 mg CBD | 2 weeks nightly | Insomnia Severity Index fell 5.07 points vs placebo |
| Karniol et al., 1975, Pharmacology | 5 men | 50 mg alone; 25–50 mg with THC | Single doses, 1 week apart | CBN alone: no drowsiness or "drugged" feeling; with THC: stronger THC effects |
| CUPID protocol, 2023, BMJ Open | (design paper) | 30 and 300 mg | — | Explains the dose choice: the higher dose was based on animal sleep data |
Notice what is missing. There is no dose-finding study that walks people up from 5 mg to 50 mg to see where benefit starts. In the six-week trial, the 25 mg group did about as well as the 100 mg group on sleep, which hints that more is not automatically better. In the insomnia trial, 30 mg showed no measurable effect on the main outcome, while 300 mg moved several secondary ones.
How Much CBN Should I Take for Sleep?
For sleep, the best-supported CBN doses are 20 mg to 25 mg taken nightly, because those are the lowest amounts that beat placebo in randomized trials of hundreds of people. In a 293-person study, 20 mg for seven nights reduced nighttime awakenings and overall sleep disturbance, though it did not help people fall asleep faster or feel less tired the next day.
The six-week trial is the strongest single piece of evidence: 25, 50 and 100 mg of CBN all improved sleep quality relative to placebo, and none differed from 4 mg of melatonin. If 25 mg did as well as 100 mg, there is little reason to start high. Our sibling guide, CBN for sleep, goes trial by trial through what changed and what didn't, and CBN vs melatonin compares the two head to head.
What about falling asleep faster?
Only the very high dose moved sleep onset. In 20 adults with clinically diagnosed insomnia, a single 300 mg dose reduced sleep onset latency and arousals measured in a sleep lab, while 30 mg did not. Three hundred milligrams is roughly 60 typical 5 mg gummies. That is a research dose, not a home dose, and anyone with diagnosed insomnia should work with a clinician.
When to take it
Trials dosed in the evening before bed. Swallowed cannabinoids absorb slowly: for oral THC, peak blood levels have been recorded 1 to 8 hours after dosing. Taking CBN 30 to 60 minutes before lights-out and judging it over several nights, not one, matches how the studies were run.
How Much CBN for Anxiety?
There is no evidence-based CBN dose for anxiety, because no human trial has tested CBN for anxiety as its main goal. The closest data come from the six-week sleep trial, which tracked anxiety as a side measure: 25, 50 and 100 mg of CBN produced no significant difference in anxiety compared with placebo.
The same trial did find that people on 100 mg had a larger decrease in stress than people on placebo. Stress and anxiety are not the same thing, and this was an exploratory outcome, so treat it as a lead rather than an answer. If calm is your main goal, CBD has a much deeper research base than CBN, which our guide to CBN for anxiety covers in detail. Anyone with an anxiety disorder should talk to a doctor before adding any cannabinoid.
How Much CBN for Pain?
No human study has found a CBN dose that relieves pain, so any "CBN dose for pain" on a label is marketing, not research. In 1975, volunteers given 50 mg of oral CBN showed no changes in pain thresholds. In 2024, 25 to 100 mg nightly for six weeks made no significant difference in pain scores compared with placebo.
The pain interest comes from animal work. In female rats, CBN injected directly into a jaw muscle reduced muscle sensitization in a model of myofascial pain. Injection into a rat muscle tells us little about a gummy in a human stomach. If pain keeps you awake, the sleep doses above are the only CBN numbers with human data behind them, and a doctor should be part of the plan.
Is 5 mg of CBN Enough? Dosing by Experience Level
5 mg of CBN is a sensible first dose but probably not an effective one for most people: it sits below every CBN-only dose that showed a benefit in a trial. Use it to check how you react, then step up.
| Your experience | Night 1–4 | Night 5–8 | Night 9+ | Ceiling to discuss with a doctor |
|---|---|---|---|---|
| New to cannabinoids | 2.5–5 mg | 5–10 mg | 10–20 mg | Above 25 mg |
| Uses CBD regularly, no THC | 5 mg | 10 mg | 15–25 mg | Above 50 mg |
| Uses THC regularly | 5–10 mg | 10–20 mg | 20–25 mg | Above 50 mg |
| Older adult or on medication | Ask first | — | — | Any dose |
A step-up schedule, not trial data. It stops at 25 mg because the six-week trial found 25 mg about as effective as 100 mg on sleep (Kolobaric 2024).
Why the slow climb? Side effects in cannabinoid trials are mostly mild, but they add up. A 2026 meta-analysis of 10 randomized cannabinoid sleep trials (2,134 people) found adverse events, mostly dizziness and dry mouth, were 3.96 times as likely as on placebo. Small steps let you find the lowest dose that works before any of that shows up.
How to Measure a CBN Tincture Dose (Dropper Math)
To dose a CBN tincture, divide the bottle's total CBN by its volume to get milligrams per millilitre, then measure by the millilitre marks on the dropper rather than counting drops. A 30 mL bottle holding 300 mg of CBN is 10 mg per mL, so half a dropper-full at the 0.5 mL mark is 5 mg.
Drop sizes vary with the dropper, the oil and how hard you squeeze, so drops are a poor unit. The line on the dropper is consistent. Here is the math for common label strengths:
| Label (CBN per 30 mL bottle) | mg per mL | 0.25 mL | 0.5 mL | 1 mL | mL for 20 mg |
|---|---|---|---|---|---|
| 150 mg | 5 | 1.25 mg | 2.5 mg | 5 mg | 4 mL |
| 300 mg | 10 | 2.5 mg | 5 mg | 10 mg | 2 mL |
| 600 mg | 20 | 5 mg | 10 mg | 20 mg | 1 mL |
| 900 mg | 30 | 7.5 mg | 15 mg | 30 mg | 0.67 mL |
| 1,500 mg | 50 | 12.5 mg | 25 mg | 50 mg | 0.4 mL |
Simple division: mg per mL = total mg ÷ bottle mL. For a 60 mL bottle, halve the "mg per mL" column.
Three checks before you trust the math. First, make sure the label number is CBN, not "total cannabinoids." Second, open the lab report (COA) and confirm the CBN result matches the label within a reasonable margin. Third, shake the bottle; cannabinoids can settle in oil. The tincture format itself, and how it compares with gummies, is covered in tincture vs edibles, and our CBD tincture and THC tincture guides use the same dropper math.
CBN Dosage by Format: Gummies, Tinctures and Capsules
Gummies and capsules give you a fixed dose per piece, tinctures let you adjust in small steps, and all three are swallowed, so they act slowly. Only one CBN trial named its vehicle: the insomnia study dissolved CBN in medium-chain triglyceride (MCT) oil, the same carrier most tinctures use.
| Format | How you dose | Easy to adjust? | Watch for |
|---|---|---|---|
| Gummy | Count pieces (e.g. 4 × 5 mg = 20 mg) | In whole or half pieces | Sugar; THC in "sleep blends"; low CBN per piece |
| Tincture (held under tongue, then swallowed) | Measure mL on the dropper | Yes, in 0.25 mL steps | Label strength in mg per bottle vs per mL |
| Capsule / soft gel | Count capsules | No, fixed | Few CBN-only capsules exist; check the COA |
| Smoked or vaped flower | Not measurable | No | CBN in flower is mostly aged THC; you are mainly dosing THC |
Shopping for a gummy? Our CBN gummies guide lists what to check on the label. On flower: CBN forms when THC oxidizes as cannabis ages, which a classic review describes as turning THC into a much less-potent cannabinoid. A jar of "high-CBN" old flower is mostly a weaker THC experience, not a measured CBN dose.
If you want a fixed, countable dose
Diesel Hemp Full-Spectrum CBD Soft Gels (25mg) — $29 $22. Not CBN, and we won't pretend it is: each vegan soft gel holds 25 mg of CBD (CBDa + CBD) from our strain-specific full-spectrum hemp extract, with trace minor cannabinoids, 30 per bottle. One soft gel is one known dose, which makes it easy to track how you feel, night to night. Prefer a chew? Our full-spectrum CBD gummies are 20 mg each.
21+ only. We do not ship to Colorado. Free shipping over $75.
Should You Combine CBN With CBD or THC?
The only trial to test CBN-plus-CBD ratios found that adding CBD did not improve CBN's effect, while older and newer research suggests CBN adds to THC's effects. So a "1:1 CBN:CBD" label is not backed by evidence, and a CBN product that also contains THC should be dosed by its THC.
CBN + CBD
In the 293-person trial, people got 20 mg CBN alone or with 10, 20 or 100 mg CBD. The authors concluded that the addition of CBD did not positively augment the CBN effect. That does not mean CBD is useless; it means the popular ratios have not been shown to beat CBN alone. For the head-to-head, read CBN vs CBD.
CBN + THC
In 1975, volunteers given CBN with THC reported feeling more drugged, drunk, dizzy, and drowsy than with THC alone, even though CBN alone did nothing noticeable. The 2021 insomnia trial that worked used mostly THC: 10 mg THC, 1 mg CBN and 0.5 mg CBD, and its benefit is hard to credit to 1 mg of CBN. If your product contains THC, the THC number decides how impaired you'll be. See CBN vs THC and how much THC for sleep.
CBN + THCA flower
Smoked or vaped THCA flower turns into delta-9 THC. Labs multiply THCA by 0.877 to get the THC it can become, so 100 mg of THCA yields about 88 mg of THC. That math is explained in our THCA vs THC entry and delta-9 THC entry. If you already smoke in the evening, adding CBN on top stacks effects, so start CBN at the low end or skip it on those nights. Small, deliberate THC amounts are covered in microdosing THC.
How Long Does CBN Take to Kick In?
No published study has charted how fast oral CBN reaches the blood in people, so any precise onset time on a label is a guess. What is known: swallowed cannabinoids absorb slowly and unevenly. For oral THC, a review of human data reported peak levels within 1−8 h of dosing, with big differences between people even with the same formula.
CBN also has an active breakdown product. In rats, the metabolite 11-hydroxy-CBN attained equivalently high brain concentrations to CBN and was active at CB1 receptors with potency comparable to THC. That may help explain why effects seem to build after a delay. Practical takeaway: dose 30 to 60 minutes before bed, do not redose the same night, and judge a dose over 3 to 4 nights.
How long does CBN last?
No human study has measured how long the effects of a CBN dose last, and we found no published human half-life for oral CBN. The closest data: after oral cannabis, CBN in urine peaked about 5 to 6 hours after dosing, and 20 mg of CBN taken at night did not increase next-day fatigue.
The urine timing comes from Sholler et al. (2022), which tracked CBN from whole cannabis, not a CBN-only product. The next-day finding comes from the seven-night Bonn-Miller 2024 trial, though grogginess was still the most-reported side effect (22 people) in the six-week trial. If you feel groggy in the morning, lower the dose or take it earlier; CBN for sleep covers timing.
Can You Take Too Much CBN? Side Effects and Cautions
No serious harms have been reported in published CBN trials at doses up to 300 mg, but mild side effects are common with cannabinoids and rise as doses climb. In the six-week trial, side effects with 25 to 100 mg CBN were no more frequent than placebo. The small insomnia trial recorded 247 mild-to-moderate adverse events across all three arms, including placebo.
The most-reported side effects in that six-week trial, counted across all groups, were grogginess or drowsiness (22 people), trouble falling or staying asleep (10) and headache (10), followed by nausea and nightmares. Pooled cannabinoid sleep trials add dizziness and dry mouth (Asim 2026). Cautions that apply to every dose:
- Do not drive or operate machinery after taking CBN, especially with THC or alcohol.
- Medications: lab and modeling work shows CBD and THC can inhibit enzymes the body uses to clear many drugs; CBN is less studied. Ask a doctor or pharmacist if you take sedatives, blood thinners, antidepressants or seizure medication.
- Pregnancy and nursing: avoid; there are no safety data.
- Older adults: ask a doctor first and start at the lowest dose.
- Kids and pets: store gummies out of reach.
- See a doctor if poor sleep lasts more than a few weeks, you snore loudly or stop breathing at night, or you feel very sleepy during the day. Those can be signs of a sleep disorder that CBN will not fix.
What is a high dose of CBN?
In published research, 100 mg nightly and a single 300 mg dose are the high end, while most products hold 5 mg or less per serving. A 2026 review put the CBN range found safe and effective in insomnia trials at 20 to 100 mg.
That range comes from Begazo 2026, and the ≤5 mg product figure from Corroon 2021. The 300 mg dose in the 2026 sleep-lab trial was chosen from animal sleep data (CUPID protocol), and in mice, repeated high doses produced tolerance and withdrawal signs. Anything above 100 mg is outside what has been tested for nightly use, so it is not a place to start.
Is It Safe to Take CBN Every Night?
Nightly CBN has only been studied for up to six weeks in humans, with mild side effects, so longer daily use is uncharted. The six-week trial reported mild to moderate side effects over the full period. A 2026 mouse study found that twice-daily CBN produced tolerance and signs of physical dependence, and CBN fully substituted for THC in drug-discrimination tests. Mouse doses don't translate directly to people, but it's a reason to use the lowest dose that works and take regular breaks.
Does CBN Get You High?
At typical product doses, CBN alone does not produce a clear high, but it is not inert: it acts on the same CB1 receptor as THC and amplifies THC. Volunteers given 50 mg of CBN alone did not report feeling drugged, drunk, dizzy, and drowsy, unlike with THC. Yet in mice, CBN fully substituted for THC, and its rat metabolite is CB1-active (Arnold 2025). At very high doses, or combined with THC, expect some intoxication. For THC's high itself, see does THCA get you high.
Will CBN Show Up on a Drug Test?
CBN can trigger a positive urine drug screen: a 2020 study found two common THC immunoassays reacted to CBN, and CBN added to any THC already present. One test needed about 5-fold more CBN than THC metabolite to cross the cutoff, the other 20-fold. Lab confirmation tests can tell them apart, but many CBN products also contain THC. If you are tested for work or sport, skip CBN. Full details are in does CBN show up on a drug test.
How to Find Your CBN Dose: Step by Step
- Check with a doctor if you take medication, are pregnant or nursing, or have a diagnosed sleep disorder.
- Read the label and COA. Note mg of CBN per serving and any THC per serving.
- Start at 2.5 to 5 mg, 30 to 60 minutes before bed, on a night with no alcohol or THC.
- Hold the dose for 3 to 4 nights and jot down: time to fall asleep, number of wake-ups, how you feel at breakfast.
- Step up by 5 mg if nothing changes and side effects are absent.
- Stop climbing at 20 to 25 mg, the range trials support, unless a clinician advises otherwise.
- Drop back if you feel groggy the next morning; that is a sign the dose is too high or too late.
- Take breaks, such as a few nights off each week or a week off each month, given the tolerance seen in animals.
Buying CBN: What to Check on the Label
CBN is still niche. In a 2023 survey of US adults, 16.8% had heard of CBN and 4.4% had used it in the past year, compared with 21.1% for CBD. Fewer buyers means less scrutiny, so check these before you pay:
- mg of CBN per serving, not just per bottle or per bag.
- THC per serving. Many "sleep" blends include THC, which changes the dose, the effect and your drug-test risk.
- A batch-matched COA from an accredited lab showing the CBN result. Our guide on how to read a COA walks through every line, and you can see ours on the Diesel Hemp test results page.
- Melatonin or other sleep aids mixed in. They muddy the question of what is working.
- Claims. Avoid any product that promises to cure insomnia or treat a disease.
Where Diesel Hemp Fits
We'd rather not slap "sleep" on a product that wasn't made for it. What we do make is measurable: 25 mg CBD soft gels and 20 mg CBD gummies from our own strain-specific full-spectrum hemp extract, plus evening-leaning THCA flower and live rosin for adults who already use THC. Diesel Hemp's flower is grown in Colorado by Diesel Hemp and partner farms and ships with third-party lab results. For the relaxing terpenes often found in evening strains, read our myrcene and linalool entries, or browse indica gummies. CBN itself has its own encyclopedia entry.
Frequently Asked Questions
How much CBN should I take?
Human studies have used 20 mg to 300 mg of CBN per dose, while most store-bought CBN products contain 5 mg or less per serving. A cautious approach is to start at 5 mg, stay there for 3 to 4 nights, and move up in 5 mg steps toward the 20 to 25 mg range the larger trials tested. Talk to a doctor first if you take medication.
How much CBN should I take for sleep?
The two largest CBN sleep trials used 20 mg for seven nights (fewer nighttime awakenings than placebo) and 25, 50 or 100 mg nightly for six weeks (better sleep-quality scores than placebo, similar to 4 mg melatonin). A 30 mg single dose showed no measurable effect in people with insomnia; 300 mg helped them fall asleep faster.
Is 5 mg of CBN enough?
5 mg is a reasonable first dose, but it is below every CBN-only dose tested in a sleep trial. A 2021 review noted that CBN sleep products typically contain 5 mg or less, and the trials that found an effect used 20 mg or more. If 5 mg does nothing after a few nights, the research suggests moving up slowly.
Can you take too much CBN?
No serious harms were reported at doses up to 300 mg in published human trials, but side effects become more likely as you add cannabinoids. In a 2026 meta-analysis of cannabinoid sleep trials, mild side effects such as dizziness and dry mouth were about four times as common as on placebo. More CBN is not always better: 30 mg did no better than placebo in one trial.
How much CBN for anxiety?
There is no human trial of CBN for anxiety, so there is no evidence-based anxiety dose. In a six-week trial of about 1,000 adults, 100 mg of CBN nightly lowered stress scores more than placebo, but no dose (25, 50 or 100 mg) changed anxiety scores. CBD has more anxiety research than CBN.
How much CBN for pain?
There is no established CBN dose for pain. A 1975 study found 50 mg of oral CBN did not change pain thresholds in volunteers, and a six-week trial of 25 to 100 mg found no difference from placebo on pain scores. Pain findings so far come from animal studies, such as injected CBN in rats.
How long does CBN take to kick in?
No study has published a full time-course for oral CBN in people. Swallowed cannabinoids absorb slowly and unevenly; for oral THC, peak blood levels have been measured anywhere from 1 to 8 hours after a dose. Most people take CBN gummies or capsules 30 to 60 minutes before bed and judge the effect over several nights, not one.
Is it safe to take CBN every night?
Nightly CBN has been studied for seven nights (20 mg) and six weeks (25 to 100 mg), with side effects no more frequent than placebo in the six-week trial. Longer-term human data do not exist yet, and a 2026 mouse study found tolerance and dependence signs after repeated CBN, so taking breaks is a sensible precaution.
What are the negative side effects of CBN?
In a six-week trial of about 1,000 adults, the most reported side effects across all groups were grogginess, trouble sleeping, headache and nausea, all mild or moderate. The 20-person CUPID trial logged 247 mild-to-moderate adverse events across all arms, including placebo. CBN may add to the effects of THC, alcohol or sedating medications, so do not drive after taking it.
Does CBN get you high?
Pure CBN at typical doses does not produce a clear high. In a 1975 study, 50 mg of CBN alone did not make volunteers feel drugged, but combined with THC it made them feel more drugged and drowsy than THC alone. Rat research also shows a CBN metabolite acts on CB1 receptors, so large doses may feel mildly intoxicating.
Will CBN show up on a drug test?
It can. A 2020 lab study found CBN cross-reacts with two common urine screens for THC, triggering them at about 5 and 20 times the THC-metabolite cutoff level, and it adds to any THC already present. Many CBN products also contain some THC. If you are drug tested, avoid CBN.
Keep reading: CBN for sleep · CBN vs CBD · CBN vs THC · CBN gummies · CBN vs melatonin · CBN for anxiety · THC for sleep · CBG · Delta 9 drinks vs edibles · Microdosing THC coffee
About the author
Marc Brannigan is COO & co-founder of Diesel Hemp and has been cultivating cannabis for over 25 years — from founding Los Suenos, a large outdoor cannabis farm in southern Colorado, to CBDRx, whose hemp crop earned USDA organic certification in 2015. He oversees breeding, cultivar selection, and every product Diesel Hemp grows. Diesel Hemp's flower is grown in Colorado by Diesel Hemp and partner farms and ships with third-party lab results. Meet the whole team →
Studies checked November 9, 2026 via PubMed, PubMed Central and Europe PMC. This article is for education only and is not medical or legal advice. It does not diagnose, treat or cure any condition. Cannabis products are for adults 21+.
