Last updated: October 2026
There’s no good evidence that CBD helps ADHD. The only controlled trial in adults with ADHD tested Sativex, a prescription spray containing THC and CBD: in 30 adults, it didn’t significantly improve the main measures. A 2026 review found too little data to assess cannabinoids for ADHD. CBD products are for adults only, so aren’t suitable for children with ADHD.
Below: what the research shows, why adults with ADHD try CBD, medicine interactions, what helps ADHD, and support.
What the research shows
| Study | What it found |
|---|---|
| Sativex trial in adults, 2017 (30 adults with ADHD) | No significant difference from placebo on the main measures of attention and activity; some signs of less hyperactivity and impulsivity that need testing in larger trials |
| Lancet Psychiatry review, 2026 | Not enough data to assess cannabinoids for ADHD |
| Surveys | Many adults with ADHD report using cannabis; regular cannabis use is linked with worse attention and mental health in some people |
No trial has tested CBD on its own for ADHD. See also CBD for focus and studying.
CBD and children with ADHD
CBD supplements aren’t suitable for under-18s, and there’s no research supporting CBD for children with ADHD. If you’re a parent looking for help, speak to your GP, school or the child’s ADHD team. See CBD for kids and magnesium for kids.
Why adults with ADHD try CBD
ADHD often comes with poor sleep, restlessness and anxiety, and some adults use CBD as part of an evening wind-down. See CBD for sleep. CBD isn’t a substitute for ADHD assessment or treatment.
If you choose to try it as an adult, start around 10mg a day. The FSA’s 10mg a day figure is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.
ADHD medicines and CBD
- CBD can affect liver enzymes that break down some medicines, including atomoxetine and some antidepressants.
- Speak to your prescriber or pharmacist before combining CBD with methylphenidate, lisdexamfetamine, atomoxetine, guanfacine or other medicines.
- Avoid THC and cannabis: they can worsen concentration, mood and anxiety.
What helps ADHD
| Approach | Details |
|---|---|
| Assessment | Via your GP, who can refer you to a specialist |
| Medicines | Stimulants and non-stimulants, prescribed and monitored by a specialist |
| Talking therapies and coaching | CBT and ADHD coaching for organisation and coping skills |
| Lifestyle | Regular exercise, sleep routines, structured days, reminders and lists |
ADHD UK and ADHD Foundation offer information and support.
Sensory overload is common with ADHD. See feeling overstimulated.
FAQs
Does CBD help ADHD?
There’s no good evidence it does. The only controlled trial tested a THC and CBD spray in adults and didn’t find a significant benefit on the main measures.
Can children with ADHD take CBD?
CBD supplements aren’t suitable for under-18s, and there’s no research supporting CBD for children with ADHD.
Can I take CBD with ADHD medication?
Ask your prescriber or pharmacist first. CBD can affect how some medicines, including atomoxetine, are broken down.
Does CBD help with ADHD and sleep?
It isn’t proven for either. Some adults use it as part of an evening routine; a regular sleep schedule helps most.
Is cannabis good for ADHD?
No. Regular cannabis use, especially THC, is linked with worse attention, mood and anxiety in some people.
Sources
- Cooper RE et al. Cannabinoids in attention-deficit/hyperactivity disorder: a randomised-controlled trial. Eur Neuropsychopharmacol, 2017.
- Wilson J et al. The efficacy and safety of cannabinoids for the treatment of mental disorders and substance use disorders. Lancet Psychiatry, 2026.
- NHS. ADHD in adults.
- NICE. ADHD: diagnosis and management (NG87).
This guide is general information, not medical advice.
