Can you overdose on CBD hemp oil? You can take too much. None of the sources read for this post reports a death from CBD, but FDA says it can cause liver injury, interfere with other drugs and add to sedation with alcohol. One published case describes a man hospitalised after eating gummies labelled 370 mg of CBD.
This is an evergreen safety explainer, not news. The figures come from an FDA consumer page, a 2011 review and a case report, and they hold until newer research replaces them.
What does FDA say about taking too much CBD?
This desk read FDA’s consumer update on cannabis and CBD products on 15 October 2026. It says harm “can happen even before you become aware of it” and lists the risks:
- Liver injury. FDA found it while reviewing Epidiolex, the purified CBD drug it approved in 2018 for two rare and severe seizure disorders. Signs showed up even in patients not on other liver-affecting drugs.
- Drug interactions. CBD can change how other medicines work, and they can change how much CBD is safe.
- Sedation. With alcohol or drugs that slow brain activity, such as those for anxiety or sleep, the risk of drowsiness and injury rises.
- Male reproductive toxicity, reported in animal studies. FDA lists it as an open question for humans.
The side effects you notice, sleepiness, diarrhea, lower appetite, irritability, should improve when CBD is stopped or the amount is reduced, FDA says.
How much CBD is too much, in bottle terms?
Two numbers travel around this topic. A 2011 safety review says doses up to 1,500 mg a day are “reportedly well tolerated in humans.” Some pages credit a 2017 review; the line we read is in the 2011 abstract. And a case report on PubMed Central describes a 56-year-old man who ate two packages of gas-station gummies, 370 mg of CBD against a 30 mg serving.
To put them on a shelf, we used one brand’s own listing, read on 15 October 2026: Lazarus Naturals’ full-spectrum tincture at 50 mg/ml, 30 ml (1,500 mg) for $40. Prices change.
| Figure | Source | Lazarus 50 mg/ml oil | Cost at $40 per bottle |
|---|---|---|---|
| 50 mg serving | Brand listing | 1 ml | $1.33 |
| 370 mg (hospital case) | Case report | 7.4 ml, about a quarter of the bottle | $9.87 |
| 1,500 mg a day | 2011 review | 30 ml, the whole bottle | $40.00 |
That is 2.67 cents a milligram; the 120 ml bottle, 6,000 mg for $120, works out to 2 cents. The arithmetic is ours from the brand’s figures. It is not a dose, and none of it is a suggestion to take any of it. We covered the brand on value in our Lazarus Naturals review.
What happens if you take too much CBD?
In the case report, the man vomited, slurred his speech and grew hard to rouse. Three hours after he arrived, his heart rate was 47 and his oxygen 78%. He recovered with supportive care by the next morning.
The caveat travels with the number. His urine toxicology screen, cannabis included, was negative, and the authors write that purity is not guaranteed and raise synthetic CBD toxicity. One case cannot show 370 mg of clean CBD does this.
Full-spectrum oil also carries THC, which is the other half of “too much.” See the full-spectrum THC-cap post and how long CBD and THC stay in your system. Read the lab sheet, not the label.
Frequently asked questions
Can you overdose on CBD hemp oil? You can take too much. None of the sources read for this post reports a death from CBD, but FDA says it can cause liver injury, interfere with other drugs and add to sedation with alcohol. One published case put a man in hospital after 370 mg of CBD gummies, though its authors raise an impure or synthetic product as a possibility.
How much CBD is too much? No source read here sets a safe ceiling. A 2011 review says doses up to 1,500 mg a day are reportedly well tolerated in humans, which is a research summary, not a dose to aim for. A man was hospitalised after 370 mg of gummies. FDA says Epidiolex’s liver risk is managed under medical supervision, which retail oil does not come with.
What happens if you take too much CBD? FDA lists drowsiness, diarrhea, decreased appetite, irritability and agitation, and says they should improve when CBD is stopped or the amount is reduced. In the 370 mg gummy case, the man vomited, slurred his speech, became hard to rouse, and his oxygen fell to 78%. He recovered with supportive care by the next morning.
Can CBD cause liver damage? FDA says plainly that CBD can cause liver injury. It found the risk while reviewing Epidiolex, its approved CBD drug, and saw signs of liver injury even in patients not taking other liver-affecting drugs. The injury showed up on blood tests, so FDA warns it could go undetected without a healthcare provider monitoring.
None of this is medical advice, and retail CBD products discussed here are not FDA-approved; FDA says it has approved only one CBD product, a prescription drug. If you take other medicines, FDA’s own advice is to talk to a healthcare provider first. For adults.