CBN's potential to improve sleep has made it a popular part of people's sleeping routines. But is it safe to take every night? The jury is still out.
From what's known so far, CBN appears to be well tolerated by healthy adults. However, research on long-term use remains limited. Nightly use should involve a consistent low dose and a trustworthy lab-tested product. If you take medication or have an underlying condition, you need to speak to a doctor before adding CBN to your routine.
If you are considering CBN, you can benefit from knowledge about its long-term safety and side effects, as well as tolerance issues and responsible use. In case you are deciding between two popular nighttime options, read our guide to CBN vs. melatonin.
What Does the Research Say About Taking CBN Nightly?
While many studies have been done to understand the effects of CBD and THC, research about CBN is still relatively new.
A Study of the Safety and Effects of CBN With and Without CBD on Sleep Quality conducted in 2024 found that CBN improved some aspects of sleep. It did well at reducing nighttime awakenings and sleep disturbance.
However, the effects were fairly modest. In general, the nightly CBN intake was well-tolerated. Only around 3% of the group that took CBN (20 mg for 7 nights in a row) reported headaches. None of the participants experienced daytime fatigue.
Since no long-term and more robust studies have been done, there isn't a way to predict how continuous (for months or years) nightly CBN use can affect a person's health.
Possible Side Effects of Nightly CBN Use
Nightly CBN use can have several side effects. They may appear immediately or come after a few days:
- Next-morning drowsiness
- Fatigue
- Dizziness
- Dry mouth
- Changes in appetite
- Digestive discomfort
If you combine CBN with THC, CBD, alcohol, or sedating medication, you might experience stronger side effects.
The extent of the side effects can depend on many factors, including dosage and your current state of health. If you are combining CBN with meds or supplements, the negative effects of these can stack up. Taking it with food could reduce or delay the effect.
Important: Since CBN can cause you to feel sleepy, don't drive or operate machinery while taking it until you know exactly how it affects your body.
Can You Build a Tolerance to CBN?
Tolerance means you need a higher amount of the same substance to achieve the effect you used to get from a smaller dose. Today, there isn't enough human research to know how often people develop a tolerance to CBN.
If your usual serving suddenly feels less noticeable, don't automatically take more. Sleep can change for many other reasons, so a look at the entire routine is warranted. Other factors that can affect sleep include:
- Drinking more alcohol
- Having a later cup of coffee
- Stress
- More screen time
- Changes in meds
If you need larger and larger servings to get the same result, don't increase the amount automatically. Speak to a medical professional instead.
Is CBN Habit-Forming?
Three concepts factor into this question:
- Tolerance: Needing more for the same effect
- Dependence: Experiencing symptoms after stopping
- Habit: Connecting something with a certain behavior (like associating taking CBN with going to bed)
Current evidence doesn't show that CBN is physically addictive. However, dedicated long-term research on CBN and dependency is still lacking.
Someone can also become behaviorally reliant on any nightly sleep ritual. If you take the same gummy every night, you may start to associate it with bedtime even if the product itself isn't causing physical dependence.
Check in with yourself from time to time. Is CBN still helping your sleep? Are you taking more than you used to? If either answer changes, consider stepping back and speaking with a healthcare professional.
CBN Alone vs. CBN With THC
You can combine CBN with other products like CBD, THC, hemp, etc. Adding anything to pure CBN can change the experience.
CBN and CBD Without Added THC
If you want a less intoxicating nighttime aid, you may want to consider combining CBN and CBD. CBD can help with relaxation without offering the THC-induced high.
Always check the label because full-spectrum hemp products can still contain trace amounts of THC.
Evn's peach-flavored CBN Gummies for Sleep contain 15 mg of CBN and 20 mg of CBD per gummy. They are made with full-spectrum hemp.
CBN Combined With THC
Adding THC changes the safety considerations. Since THC is psychoactive, it can cause a high and add side effects.
If you choose a CBN and THC product, start with the smallest suggested serving. Don't drive or use alcohol together with this type of product.
Evn's CBN + THC Gummies combine CBN with indica rosin and a balanced 1:1 THC-to-CBD ratio. Each gummy contains 2 mg of CBN.
How Much CBN Should You Take at Night?
The lack of research also means a lack of guidance about clinical doses. Existing studies tested amounts for short-term use. This doesn't provide any information about long-term practices.
Follow the serving instructions for the specific product, because each one can have different additives. A product that contains THC or a larger amount of CBD may feel different from a CBN-only product.
A tried-and-tested "start low and go slow" approach works best. Begin with the smallest recommended serving and take it at a consistent time.
If you are using an edible, give it enough time to take effect. Taking an edible with or without food can change how quickly you feel its effects. Keep your dose stable while you learn how your body responds.
Who Should Speak with a Healthcare Professional First?
It is a good idea to speak with a healthcare professional before adding CBN to your nightly routine if you:
- Take prescription medication
- Use sleep medication or sedatives
- Take medication with a grapefruit warning
- Regularly drink alcohol before bed
- Have liver disease or another significant medical condition
- Are pregnant, nursing, or trying to become pregnant
- Have an upcoming surgery
- Have persistent insomnia or unexplained fatigue
- Have had a strong reaction to cannabinoids in the past
Please note that Evn products are intended only for adults age 21 and older.
Why Product Quality Matters for Nightly Use
When you use a product regularly, the quality becomes especially important. When choosing the best CBN option, check for:
- Accessible certificate of analysis
- Third-party potency testing
- Screening for contaminants
The label should state the amounts of CBN, CBD, and THC per serving. It should also provide a consistent serving size and transparent information about ingredients and hemp sourcing.
Inaccurate labeling can expose you to a higher CBN or THC content.
Signs You Should Reduce Your Dose or Stop Taking CBN
Your body can usually tell you when a product is not a good fit. Pay attention to these symptoms:
- Persistent morning grogginess
- Dizziness
- Balance problems
- Feeling unusually confused
- The need to increase the serving repeatedly
- Sleep quality getting worse
- Interference with medication or daily functioning
- An uncomfortable psychoactive effect
- Am allergic reaction
If you develop a severe reaction, seek urgent medical care.
CBN Should Support a Sleep Routine, Not Replace One
CBN should be one small part of a healthy sleep routine. You need to continue working on your sleep hygiene, which includes reducing alcohol and caffeine.
It can also help to reduce bright light and screen exposure before bed. Keep your bedroom cool, quiet, and dark when possible.
If recurring pain, anxiety, snoring, or nighttime waking keeps disrupting your sleep, seek professional medical opinion.
The Bottom Line: Can You Take CBN Every Night?
Many healthy adults may be able to incorporate CBN into a nightly routine without significant problems. However, CBN hasn't been studied well enough to guarantee that continuous, long-term use is risk-free.
Try not to combine CBN with other substances and listen to your body for reactions. If you take medication or have a health condition, speak with a healthcare professional before making CBN part of your nightly routine.
FAQs
Does CBN make you groggy the next morning?
It can, especially if you take a high dose or combine it with THC, alcohol, or other sedating substances.
Does CBN lose effectiveness over time?
Tolerance to CBN still needs to be studied. If you feel like you need a higher serving to achieve the same effect, seek professional advice before continuing.
Can I take CBN with CBD every night?
Many products combine CBN with CBD. However, individual responses and medication interactions vary. The complete formula and dosage can define the effect.
Is it safe to take CBN and THC together every night?
Combining them introduces THC-related impairment and side effects. You need to weigh the pros and cons before experimenting. Always start with a low dose.
Will CBN show up on a drug test?
It might. Full-spectrum products and CBN products containing THC may lead to a positive drug test. Even products marketed without THC can present some risk through trace content or inaccurate labeling.
References
Henson, J., Vitetta, L., Quezada, M., & Hall, S. (2021). Enhancing Endocannabinoid Control of Stress with Cannabidiol. Journal of Clinical Medicine, 10(24), 5852. https://doi.org/10.3390/jcm10245852
Vargas, A. C., et al. (2024). A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality. Experimental and Clinical Psychopharmacology. https://doi.org/10.1037/pha0000676
