Last Updated:
August 12th, 2026
If you’re facing detox or watching someone you love go through a detox from alcohol or a detox from drugs, or , the word “seizure” is a frightening one to come across. You’ve probably read that it can happen when someone stops drinking or comes off certain medications and now you want to know how real that risk actually is and what can be done about it.
It’s a fair question to ask and an important one. A withdrawal seizure is a medical emergency and understanding why it happens is the first step toward making sure detox is done safely.
We explain what a withdrawal seizure is, who is most at risk and where you can get help to detox in a way that keeps you safe.
What a withdrawal seizure actually is
To understand a seizure, it helps to understand what long-term drinking does to the brain in the first place.
Alcohol has a calming, slowing effect on the brain and when someone drinks heavily for a long time, the brain adapts to being constantly slowed down. It does this by turning up its own excitatory, stimulating activity to compensate. Essentially, the brain is trying to find a balance.
But the problem starts when the alcohol is suddenly removed, as all that ramped-up activity is now left unopposed, with nothing to calm it, causing the brain to go into overdrive. This state is called hyperexcitability and a seizure is what can happen when that overactivity tips past a certain point.
In simple terms, the brain has spent months or years pushing hard against the alcohol and when the alcohol disappears overnight, that force has nowhere to go.
Why these seizures are a medical emergency
Withdrawal seizures usually arrive in a particular window, most commonly between 12 and 48 hours after the last drink. They are usually the kind that cause loss of consciousness and violent shaking of the whole body.
They can also come in clusters rather than as a single event and in some cases, they can become more serious and harder to control. This is why a withdrawal seizure is never something to manage at home and hope it passes.
A fall during a seizure can also cause serious injury and a prolonged seizure starves the brain of oxygen, which is part of why they’re treated so urgently. A seizure can also be the signal that withdrawal is heading toward its most severe form, which carries serious risks of its own.
Treating the early stages properly is what stops things reaching that point.
Substances that can cause seizures
Not every substance carries a real seizure risk on withdrawal, which is part of why the danger gets underestimated. The two that matter most here are alcohol and benzodiazepines. Both work on the same calming system in the brain and both produce the same rebound when they’re taken away.
With benzodiazepines, the seizure risk follows the same logic as alcohol and stopping a short-acting, high-strength one abruptly is the most dangerous way to do it. This is one reason these medications are meant to be reduced slowly rather than stopped all at once.
Anyone dependent on both alcohol and a benzodiazepine at the same time sits in a higher-risk category again, which is one of the first things a proper assessment will check for.
What raises your risk of experiencing a seizure?
Seizure risk isn’t the same for everyone going through withdrawal and several things push it higher, meaning knowing where you stand is exactly what a clinical assessment is for.
One thing worth being clear about is that severity can’t be reliably predicted from the outside. Two people with similar drinking histories can have very different withdrawals, which is why a clinical assessment matters rather than guesswork.
- Severe or worsening tremors
- Agitation
- Restlessness
- Confusion
- Disorientation
- Experiencing hallucinations
- Escalating anxiety
These are the body signalling that withdrawal is intensifying and acting on them early can prevent a seizure rather than waiting for one to confirm the danger.
How a professional detox keeps you safe
The reassuring part of all this is that withdrawal seizures are largely preventable with the right support. A medical detox is built specifically to manage the risk.
You’re monitored throughout, with staff watching for the early warning signs and ready to act before things escalate. Medication, usually a benzodiazepine given in carefully reducing doses, calms the overactive brain in a controlled way and brings the rebound down gently rather than letting it spike.
Clinical guidance in the UK is clear that anyone at high risk of withdrawal seizures should be detoxing under medical observation rather than at home. The whole point of the setting is to take a truly dangerous process and make it safe.
This is also exactly why detoxing alone is so risky, as the danger of withdrawal is a reason to stop with the right help in place.
Where you can get help
If you’re worried about seizures, either for yourself or someone close to you, the safest next step is to talk to someone who can assess the risk properly.
Your GP is a reasonable starting point and you can also approach a local alcohol service directly. If you’d prefer a fully monitored detox in a setting designed for it, you can speak to us directly and we’ll talk you through what a medically managed withdrawal involves.
How UKAT can help
If anything on this page has worried you, whether about your own detox or someone you care about, UKAT can help you do this safely.
We provide professional detox across the UK, with monitoring and medication in place to manage withdrawal and bring the risk of seizures right down. Detox is followed by therapy and aftercare, because coming off the substance safely is the start of recovery rather than the whole of it.
You don’t need to have anything worked out before you get in touch. Contact UKAT today for a confidential conversation, with no pressure and no obligation.
(Click here to see works cited)
- Whittington, M. A., Lambert, J. D., & Little, H. J. (1995). Increased NMDA receptor and calcium channel activity underlying ethanol withdrawal hyperexcitability. Alcohol and Alcoholism (Oxford, Oxfordshire), 30(1), 105–114. https://pubmed.ncbi.nlm.nih.gov/7748267/
- GOV.UK. (2025). Clinical guidelines for alcohol treatment – 10. Pharmacological interventions – Guidance – GOV.UK. Www.gov.uk. https://www.gov.uk/guidance/clinical-guidelines-for-alcohol-treatment/10-pharmacological-interventions
- Becker, H. C. (2024). Kindling in Alcohol Withdrawal. Alcohol Health and Research World, 22(1), 25. https://pmc.ncbi.nlm.nih.gov/articles/PMC6761822/
- National Institute for Health and Care Excellence. (2017, June 2). Alcohol-use disorders: Diagnosis and Management of Physical Complications | Guidance | NICE. Nice.org.uk; NICE. https://www.nice.org.uk/guidance/cg100/chapter/Recommendations


