CBD oil hasn’t been shown to reliably improve sleep. The few controlled trials in people with insomnia are small, and the best recent one found CBD worked about as well as a placebo on most sleep measures. Products are often mislabelled too, so if you’re struggling to sleep, a structured approach called CBT for insomnia (CBT-I) has far stronger evidence.
That doesn’t mean everyone who says CBD helped them is imagining it. It means the research hasn’t caught up with the marketing. Here’s what’s known, what the risks are, and what to try instead.
What CBD is (and isn’t)
CBD, or cannabidiol, is one of many compounds found in the cannabis plant. Unlike THC, the compound that causes a “high”, CBD isn’t intoxicating on its own. CBD oils, gummies and capsules are sold online with claims about stress, pain and sleep.
In the US, the Food and Drug Administration has approved only one CBD medicine, Epidiolex, which is a prescription drug for certain seizure disorders. The FDA has not approved any CBD product for sleep, as it explains in its consumer guide to cannabis and CBD products.
What sleep trials actually show
The evidence base is thinner than it looks.
- A systematic review in Cannabis and Cannabinoid Research (2023) looked at 34 studies of CBD and insomnia symptoms. The authors thought CBD may help, but only 2 of the 34 studies focused on people with insomnia, one of them a single case report, and most didn’t use objective sleep measures. They said proper trials in people with insomnia are needed before firm conclusions can be drawn.
- A randomised, placebo-controlled pilot trial published in the Journal of Clinical Sleep Medicine in 2024 gave 150 mg of CBD nightly to 15 adults with moderate to severe insomnia and placebo to another 15, for two weeks. The authors concluded that CBD was similar to placebo on most sleep outcomes. Insomnia severity, time taken to fall asleep and time spent awake at night didn’t differ between groups. One objective measure (sleep efficiency) was better with CBD at two weeks, and people on CBD reported better well-being.
So the honest summary is: a possible small effect in some people, no solid proof, and very little long-term data. If you’ve read that CBD “cures insomnia”, that claim isn’t supported.
The labelling problem
Even if CBD did help, you can’t be sure what’s in the bottle. A study in JAMA tested 84 CBD products bought online in the US:
| What the lab found | Share of products |
|---|---|
| CBD content matched the label (within 10%) | About 31% |
| More CBD than the label said | About 43% |
| Less CBD than the label said | About 26% |
| THC detected | 18 of 84 products (about 21%) |
The FDA reports similar problems from its own testing: many products didn’t contain the amount of CBD they claimed, and it has looked into reports of contaminants such as pesticides, heavy metals and THC. That study is from the US, but the same quality issues apply to anything bought online without proper testing.
Side effects and medicine interactions
CBD isn’t risk-free. The FDA’s guide lists:
- Liver injury. CBD can affect the liver, which is harder to spot when you’re using it without a doctor.
- Interactions with other medicines. CBD can change how other drugs work, which can cause serious side effects. This matters if you take medicines for epilepsy, blood thinners, antidepressants or anything processed by the liver.
- Drowsiness that adds up. Combining CBD with alcohol or sedatives, including sleeping tablets and some anti-anxiety medicines, raises the risk of sedation and injuries.
- Mood changes, such as irritability and agitation.
If you’re pregnant or breastfeeding, talk to your doctor before using any CBD product, and don’t give it to children unless a specialist prescribes it. Never drive after taking a product that might contain THC. If you take regular medicines, our guide to supplement and medicine interactions explains why you should tell your doctor about anything you add.
Is CBD legal in India?
This is a grey area, and the rules aren’t simple. Cannabis is controlled in India under the Narcotic Drugs and Psychotropic Substances (NDPS) Act, 1985, and state rules also apply. CBD oils are advertised for sale online, but that alone doesn’t tell you a product is legal, licensed or tested. We can’t give legal advice. Check the official text of the NDPS Act on the government’s India Code website, buy only from licensed pharmacies, and ask your doctor before using any cannabis-derived product.
What works better for sleep
The American College of Physicians recommends cognitive behavioural therapy for insomnia (CBT-I) as the first treatment for adults with long-term insomnia. CBT-I combines sleep education with techniques called stimulus control (using the bed only for sleep) and sleep restriction (temporarily limiting time in bed so sleep becomes deeper and more regular). It can be done with a therapist, in groups, online or with a self-help book.
The NHS page on insomnia adds these everyday steps:
- Go to bed only when you feel sleepy, and get up at the same time every day, including weekends.
- Give yourself at least an hour to wind down before bed.
- Keep your bedroom dark, quiet and comfortable.
- Avoid tea, coffee, alcohol and smoking for 6 hours before bed. That includes the evening chai.
- Put screens away before bed.
- Exercise during the day, but not within 4 hours of bedtime.
Most adults need 7 to 9 hours. The NHS notes that sleeping tablets are rarely prescribed, and when they are, it’s for a few days or weeks at most. For more practical ideas, see our guides to insomnia causes and types, tips to improve your sleep and blue light and sleep.
When to see a doctor
See a doctor if:
- you’ve had trouble sleeping for months, or changing your habits hasn’t helped
- poor sleep is making it hard to cope with work, study or family life
- someone notices you snore loudly, stop breathing or gasp in your sleep, or you wake with headaches and feel sleepy all day (possible sleep apnoea)
- you feel low, anxious or hopeless along with poor sleep
- you’re using CBD, sleeping pills or alcohol most nights to get to sleep
Get urgent help (call 112) if someone becomes very drowsy, confused or hard to wake after taking CBD with alcohol or sedatives, or if you notice yellowing of the skin or eyes, dark urine or severe stomach pain, which can be signs of liver trouble. If poor sleep comes with thoughts of self-harm, call Tele-MANAS on 14416.
Frequently asked questions
Does CBD oil make you sleepy?
Drowsiness is a known side effect, but that’s not the same as treating insomnia. In a 2024 trial in people with insomnia, CBD was similar to placebo on most sleep measures.
Is CBD the same as cannabis?
CBD comes from the cannabis plant but doesn’t cause a high on its own. Some products contain THC anyway, which is why lab testing matters.
Can I take CBD with sleeping pills or melatonin?
Don’t without asking your doctor. CBD can add to the sedating effect of other medicines and alcohol, and it can change how some drugs work.
How long does CBT-I take to work?
It isn’t an overnight fix. CBT-I is a course of sessions, and sleep restriction can make you more tired at first before sleep settles. Ask your doctor or a psychologist about options, including online programmes.
Is it safe to use CBD every night?
There isn’t enough long-term research to say. Because of the risks to the liver and of interactions, talk to a doctor before using it regularly.
This article is for general information and is not a substitute for advice from a doctor. If you have symptoms or a health condition, please consult a qualified healthcare professional.