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Last updated: October 2026.
It is the first question many people ask before trying CBD: “Will it make me high?” The short answer is no. But the full answer is worth knowing, because the confusion between CBD, THC and the newer semi-synthetic products is exactly what catches people out. This guide explains it in plain English.
The short answer
- CBD does not make you high. It is not intoxicating.
- THC is the compound in cannabis that causes a high, and it is a controlled drug in Ireland.
- Some people feel calmer or a little drowsy on CBD. That is not a high.
- The real risks come from products that contain THC, or semi-synthetic compounds such as HHC, sold as “CBD”.
CBD vs THC: same plant, very different effects
CBD (cannabidiol) and THC (tetrahydrocannabinol) are both cannabinoids from the cannabis plant, and they have almost the same chemical formula. But a small difference in how their atoms are arranged means they behave very differently in the body.
| CBD | THC | |
|---|---|---|
| Causes a high? | No | Yes |
| Effect on CB1 receptors in the brain | Does not activate them in the same way | Activates them strongly |
| Legal status in Ireland | Not a controlled drug | Controlled drug at any level in food |
| Shows on drug tests? | Not tested for | Yes |
| Typical product | Oils, gummies, capsules, creams | Illegal cannabis, edibles, vapes |
Why CBD does not cause a high
Your body has a network of receptors and messengers known as the endocannabinoid system. THC causes a high mainly by binding to and activating CB1 receptors, which are concentrated in the brain. CBD does not activate CB1 receptors in the same way. Instead, it interacts with the body through a range of other routes, which researchers are still mapping. That is why CBD does not cause euphoria, distorted perception or impaired judgement.
The World Health Organization’s Expert Committee on Drug Dependence reviewed CBD in 2018 and found it is generally well tolerated, with no evidence of abuse or dependence potential in humans.
So why do some people “feel something”?
Some people describe a gentle sense of calm or relaxation after taking CBD, especially in the evening. A minority feel drowsy, particularly at first or at higher amounts. Others notice nothing at all. None of these is a high: you stay clear-headed and in control.
When a “CBD” product can make you high
- It contains THC. Some products made with whole-plant extracts contain THC, and poorly controlled products can contain much more than labelled.
- It is not really CBD. Products sold as HHC, THCP or Delta-8 are semi-synthetic compounds that can cause a strong high. HHC was made a Schedule 1 controlled drug in Ireland in July 2025.
- It is cannabis flower. “CBD bud” contains THC and is illegal in Ireland.
This is why the lab report matters. It should confirm the CBD content and show THC as not detected for the batch.
Can CBD affect driving?
CBD does not impair you in the way THC does. However, because a small number of people feel drowsy, take your first doses at home and do not drive if you feel drowsy. Garda roadside drug tests look for THC, so a product containing THC could lead to a positive test. Read more in is CBD oil legal in Ireland?.
Can CBD show up on a drug test?
Standard drug tests look for THC, not CBD. A genuinely THC-free product should not cause a positive result. Products containing THC, even in small amounts, could, especially with regular use. If you are tested at work or in sport, choose a THC-free product with a lab report and keep a copy.
What does CBD feel like?
Most people describe CBD as subtle. Common descriptions include feeling more settled, finding it easier to switch off in the evening, or simply noticing very little. Effects from oil held under the tongue usually start within 15 to 45 minutes and last 4 to 6 hours; gummies and capsules take longer to start and last a little longer. Read how long CBD takes to work.
Myths about CBD and getting high
| Myth | Fact |
|---|---|
| “CBD is just weed without the fun.” | CBD is a single compound from hemp. It is sold as a food supplement and does not cause a high. |
| “Higher-strength CBD gets you higher.” | Strength means more CBD per drop, not a high. A 30% oil does not cause a high any more than a 10% oil does. |
| “0.2% THC is legal in Ireland.” | No. That is a farming rule. In Ireland, food products containing THC at any level are treated as controlled drugs. |
| “CBD turns into THC in your stomach.” | Some early lab studies raised this idea, but human studies have not found that oral CBD produces THC-like effects. |
| “HHC is a legal version of CBD.” | HHC is a semi-synthetic compound that can cause a high, and it was made a controlled drug in Ireland in July 2025. |
Why the confusion exists
CBD and THC come from the same plant, CBD shops sometimes sit alongside head shops, and some sellers deliberately blur the line with products such as “CBD bud”, “cannabis gummies” or HHC vapes. Add the word “cannabis” to anything and people understandably assume it will make them high. The simplest rule: a legitimate CBD supplement states its CBD content in mg, has a lab report showing no detectable THC, and makes no claims about getting high or treating illness.
Choosing a CBD product that will not make you high
- Check the lab report for the batch: THC should be “not detected”.
- Avoid products sold as flower, buds, pre-rolls, HHC, THCP, Delta-8 or “cannabis” anything.
- Buy from a real company with an Irish or EU address.
- Start with a modest amount, such as 5 drops of a 10% oil or one CBD gummy.
Possible side effects of CBD
CBD is generally well tolerated, but some people experience tiredness, dry mouth, changes in appetite or a mild upset stomach, usually at higher amounts. CBD can also interact with some medicines. Read our guide to CBD side effects, and speak to your GP or pharmacist first if you take medication.
CBD, alcohol and other substances
CBD does not cause a high on its own, but combining it with alcohol, sleeping tablets or other sedating substances may increase drowsiness. If you drink, keep it light and leave a gap after taking CBD. Read how long CBD lasts for timing. Never combine CBD with illegal drugs, and never drive after drinking or if you feel drowsy.
Frequently asked questions
Does CBD make you high?
No. CBD (cannabidiol) does not cause a high. The high associated with cannabis comes from THC, a different compound.
Why do I feel something after taking CBD?
Some people notice a gentle sense of calm or relaxation, and a few feel drowsy. That is not the same as a high: CBD does not cause euphoria, impaired judgement or distorted perception.
Can CBD products contain THC?
Some can, particularly products made with whole-plant extracts or poorly controlled products. Irish law has no tolerance for THC in food, so check the lab report.
Can I drive after taking CBD?
CBD does not impair you the way THC does, but some people feel drowsy. See how it affects you first, and do not drive if you feel drowsy. Garda roadside tests look for THC.
Will CBD show up on a drug test?
Drug tests look for THC, not CBD. A genuinely THC-free product should not cause a positive result, but products containing THC could.
Is CBD addictive?
The World Health Organization’s 2018 review found no evidence of abuse or dependence potential with CBD in humans.
What about HHC or Delta-8?
These are semi-synthetic compounds that can cause a strong high. They are not CBD. HHC was made a controlled drug in Ireland in July 2025.
Is it safe to take CBD before work?
For most people, yes, as it does not cause a high. Try it first on a day off to see how you feel, and avoid it before driving or operating machinery if it makes you drowsy.
Can CBD make you feel anxious?
It is uncommon, but anyone can react differently to a new supplement. If you feel unusual after taking CBD, stop and speak to your GP or pharmacist.
Can I take CBD at work?
Many people do, as it does not cause a high or impair judgement. If you are subject to workplace drug testing, choose a THC-free product with a lab report.
Is CBD safe for older people?
Many older adults use CBD. Because older people are more likely to take regular medication, it is especially important to check with a GP or pharmacist first.
Does CBD affect your mood?
Some people say they feel more settled; others notice nothing. CBD does not cause euphoria. It is sold as a food supplement and cannot claim to treat any mood condition.
Disclaimer: CBD is sold as a food supplement. It is not intended to diagnose, treat, cure or prevent any disease and is not a substitute for medical advice. Always consult a healthcare professional before starting a new supplement, especially if you take medication, are pregnant or breastfeeding.
