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Last reviewed: October 2026
Anxiety is one of the main reasons people look into CBD. You will find bold promises online, and you will find people who say it made no difference at all. This guide sets out what the research actually shows, why the doses in studies are very different from what is in a typical bottle, how to use CBD safely if you decide to try it, and the approaches with the strongest evidence for anxiety.
If you are feeling overwhelmed right now, please talk to someone. In Ireland, Samaritans are available free, day or night, on 116 123, and you can text HELLO to 50808 for the free 24/7 text service.
The honest summary
CBD is not a treatment for anxiety, and CBD food supplements sold in Ireland are not allowed to claim that it is. Some small studies have looked at CBD and anxiety in specific situations, such as public speaking tests, with interesting but limited results. Those studies often used single doses of hundreds of milligrams, far higher than the amounts in food supplements. Larger, longer, high-quality trials are still needed. If anxiety is affecting your life, your GP is the best first step.
What the studies have looked at
Simulated public speaking
Some of the best-known research gave volunteers a single dose of CBD before a public speaking test and measured how anxious they felt. Several of these small studies reported lower anxiety scores than placebo at certain doses, but not at all doses, and they involved only a few dozen people each.
Anxiety disorders
A smaller number of studies have looked at people diagnosed with anxiety disorders over several weeks. Results are mixed, many studies lack a placebo group, and doses again tend to be higher than supplement levels.
Animal and laboratory work
Much of the interest comes from animal studies exploring how CBD interacts with serotonin receptors and the endocannabinoid system. These help researchers decide what to test in people. They cannot tell you how a CBD oil will affect you.
Why supplement doses are different
A typical recommended serving on a CBD food supplement is in the range of a few milligrams to a few tens of milligrams a day. Many of the anxiety studies used single doses of 150mg to 600mg. Taking that much CBD from a food supplement would mean going well above the label’s maximum daily serving, which we strongly advise against because of the higher risk of side effects and medicine interactions. So even where studies show something interesting, it is not safe to assume a supplement will do the same.
What CBD will not do
- It will not replace prescribed medication. Never stop taking anxiety or antidepressant medication without your doctor.
- It will not fix the causes of anxiety, such as stress at work, money worries or past experiences.
- It does not work like a sedative or a benzodiazepine.
If you decide to try CBD
- Talk to your GP or pharmacist first, especially if you take antidepressants, anti-anxiety medicines, sleeping tablets or any regular medication. CBD can interact with some of them.
- Choose a lab-tested product with THC not detected. THC can make anxiety worse in some people. See our guide to choosing CBD oil.
- Keep within the label’s recommended daily serving.
- Be consistent for a few weeks rather than taking it only on bad days.
- Keep a simple diary of sleep, mood and stressful events to judge honestly.
- Stop if you notice side effects or feel worse.
Approaches with strong evidence for anxiety
Talking therapies
Cognitive behavioural therapy (CBT) has strong evidence for many anxiety disorders. In Ireland, your GP can refer you to HSE primary care psychology or counselling, and some services offer free online CBT programmes.
Exercise
Regular physical activity, even brisk walking for 30 minutes most days, has good evidence for reducing anxiety symptoms.
Sleep
Poor sleep and anxiety feed each other. A regular sleep and wake time, a wind-down routine and limiting caffeine after midday can help. See our guide to sleep routines.
Breathing and grounding techniques
Slow breathing (for example, in for four, out for six) and grounding exercises can help in the moment.
Cutting back on alcohol and caffeine
Both can worsen anxiety. Alcohol may feel calming at first but often makes anxiety worse the next day.
Medication
For some people, medication prescribed by a GP or psychiatrist is an important part of treatment.
Where to get help in Ireland
- Your GP: the first step for assessment and referrals.
- Samaritans: 116 123, free, 24 hours.
- Text 50808: text HELLO for free 24/7 support.
- Jigsaw: mental health support for young people aged 12 to 25.
- Aware: support for depression and anxiety, including a support line.
- HSE YourMentalHealth: information line 1800 111 888.
- In an emergency, go to your nearest emergency department or call 112 or 999.
CBD, THC and anxiety
THC, the intoxicating compound in cannabis, can cause anxiety and paranoia, especially at higher doses or in people prone to anxiety. That is one reason it matters that a CBD product has a lab report showing THC is not detected. Products containing HHC or other semi-synthetic cannabinoids, now controlled in Ireland, have also been linked to panic attacks and hospital visits.
Side effects and interactions
Possible side effects of CBD include tiredness, diarrhoea and appetite changes. CBD may interact with medicines processed by the liver, including some antidepressants, benzodiazepines and other sedatives, potentially increasing drowsiness. Do not combine CBD with alcohol, and do not drive if it makes you drowsy.
Everyday worry vs an anxiety disorder
Feeling anxious before an exam, an interview or a difficult conversation is normal and often useful. An anxiety disorder is different: the worry is out of proportion, hard to control, lasts for weeks or months and gets in the way of work, relationships or sleep. Physical signs can include a racing heart, tight chest, dizziness, stomach upset and trouble breathing. Panic attacks can feel frightening and may be mistaken for a heart problem. If any of this sounds familiar, a GP can help work out what is going on and what support would suit you. No supplement can do that assessment.
A simple daily routine that supports calmer days
- Get daylight and some movement early in the day, even a 15-minute walk.
- Eat regular meals; low blood sugar can feel like anxiety.
- Keep caffeine to the morning.
- Schedule short “worry time” to write worries down rather than carrying them all day.
- Limit news and social media, especially before bed.
- Practise slow breathing for five minutes, twice a day, not only when anxious.
- Keep a regular bedtime and wake time, including weekends.
- Talk to someone you trust about how you are feeling.
If you choose to include CBD, it fits into a routine like this rather than replacing it.
Questions to bring to your GP
- Could my symptoms have a physical cause, such as thyroid problems?
- What talking therapies are available locally, and how long is the wait?
- Would medication help in my case?
- Is CBD safe with the medicines I take?
Whatever you decide about CBD, the most important step is not to face anxiety alone. Small, steady changes, good support and honest information go a long way.
Frequently asked questions
Does CBD help with anxiety?
Research is limited and mixed. Some small studies using high single doses showed lower anxiety in specific tests. CBD supplements in Ireland cannot claim to treat anxiety.
How much CBD should I take for anxiety?
Keep within the recommended daily serving on the label. Study doses were much higher than supplement servings, and going above the label is not advised.
Can I take CBD with antidepressants?
Talk to your GP or pharmacist first. CBD can interact with some antidepressants and anti-anxiety medicines.
Can CBD make anxiety worse?
CBD itself is not intoxicating, but products containing THC can increase anxiety. Use lab-tested, THC-free products.
How long does CBD take to work for anxiety?
There is no reliable answer. If you try it, use it consistently for a few weeks and keep a diary.
Is CBD better than medication for anxiety?
No. Talking therapies and, where appropriate, prescribed medication have much stronger evidence.
Where can I get help for anxiety in Ireland?
Start with your GP. Samaritans (116 123) and text 50808 are free and available 24/7.
Is CBD safe for teenagers with anxiety?
CBD food supplements are not intended for under-18s. Jigsaw offers free support for young people.
Related guides
This guide is for general information only and is not medical advice. CBD products sold in Ireland are food supplements or cosmetics, not medicines. Speak to your GP or pharmacist before using CBD, especially if you take medication, are pregnant or breastfeeding.