Are brain zaps harmful? What they are, why they happen and what helps
Brain zaps are brief electric-shock sensations that often come with stopping, reducing or missing an antidepressant. Here's what's known about them and how to ease them.
By Tanya Rybakova · Medical review pending · 2026-11-02 · 5 min read
This article is currently awaiting full medical review. All facts and sources in this piece reflect the current state of the evidence, and all claims have been fact-checked against primary sources. Once the review is complete, we'll publish the article with any relevant updates.
Key takeaways Brain zaps are brief electric-shock or buzzing sensations in the head or body. They're a recognized withdrawal symptom after stopping, reducing or missing an antidepressant. There's no evidence that brain zaps damage the brain or are seizures. They're unpleasant and poorly understood, and for most people they pass. They're more common with antidepressants that leave the body quickly, such as paroxetine and venlafaxine, and often come on with sideways eye or head movements. Most withdrawal symptoms settle within one to two weeks, but brain zaps can last longer, and for a small number of people they persist for months. If brain zaps are hard to live with, your prescriber may restart the previous dose and plan a slower reduction. Don't stop or change your dose on your own. On this page
What are brain zaps? Are brain zaps harmful? Are brain zaps mini seizures? What causes brain zaps? How long do brain zaps last? What helps brain zaps? Can you get brain zaps without stopping an antidepressant? What to tell your prescriber about brain zaps You turn your head, and for a split second it feels like a jolt of electricity runs through your brain. If you've recently cut down, stopped or missed a dose of your antidepressant, that sensation has a name: brain zaps. It's understandable to wonder whether something is wrong. So, are brain zaps harmful?
This guide explains what brain zaps are, what's known about them, how long they tend to last, and what you and your prescriber can do.
What are brain zaps?
Brain zaps are brief jolts that feel like a small electric shock or a buzz in the head, sometimes spreading into the arms or legs. They're a common symptom of antidepressant withdrawal. Many people notice them when they move their eyes or turn their head to the side.
Official sources describe them in clinical terms. In the UK, NICE lists "electric shock sensations" among antidepressant withdrawal symptoms. The Royal College of Psychiatrists describes the feeling of an electric shock in your arms, legs or head. In the US, the FDA-approved prescribing information for sertraline (Zoloft) lists "sensory disturbances (e.g., paresthesia, such as electric shock sensations)" among reactions after stopping. Paresthesia means unusual nerve sensations such as tingling or prickling.
Our guide to antidepressant brain zaps covers what they feel like and which medicines they're linked to most often.
Are brain zaps harmful?
There's no evidence that brain zaps damage the brain or nerves, though what causes them is poorly understood. They're a withdrawal symptom, and for most people they fade as the body adjusts to a lower dose or to being off the medicine. They can still be distressing, disrupt sleep and make everyday tasks harder, so they deserve to be taken seriously.
One of the few studies dedicated to brain zaps, a 2018 analysis of 595 personal accounts , found they were usually temporary. In a small number of cases, though, they caused significant disability that lasted months or years. The authors called for more research into how to prevent and treat them.
Are brain zaps mini seizures?
Brain zaps haven't been linked to seizures in the research so far. They haven't been studied much, but they don't come with the loss of awareness, falls or jerking movements that seizures usually cause. They're described as a sensation rather than a loss of control.
If you ever lose consciousness, have uncontrolled jerking, or are confused afterward, treat it as an emergency and get help straight away. That isn't what brain zaps usually look like.
What causes brain zaps?
Brain zaps usually start when the level of an antidepressant in the body drops: after stopping it, reducing the dose, or missing or delaying doses. NICE lists them among the withdrawal symptoms that can follow any of these changes. They're more likely with medicines that leave the body quickly, such as paroxetine and venlafaxine.
The 2018 study of personal accounts found that venlafaxine and paroxetine came up more often, and fluoxetine less often, than their use in practice would predict. Stopping suddenly was the most likely trigger, and gradual tapering only partly prevented the zaps. The authors also found that brain zaps were frequently set off by sideways eye movements.
NICE notes that fluoxetine's long-lasting effect means it can sometimes be stopped with fewer problems. If brain zaps are making it hard to come off a shorter-acting medicine, it's worth asking your prescriber about the options. Our guide to switching antidepressants explains how changes between medicines are usually managed.
How long do brain zaps last?
For many people, brain zaps settle within one to two weeks, in line with other withdrawal symptoms. NICE says withdrawal is sometimes more difficult, with symptoms lasting several weeks and occasionally several months.
A 2019 review of withdrawal studies found that a significant share of people had withdrawal symptoms for more than two weeks, and that lasting several months wasn't unusual. If your brain zaps aren't easing after a couple of weeks, or are getting worse, tell your prescriber rather than waiting.
What helps brain zaps?
What helps depends on what set them off. If you missed or delayed doses, getting back to your usual dose at a regular time usually helps. If they started during a planned reduction, NICE says your prescriber may restart the previous dose and then reduce more slowly, in smaller steps, once symptoms have settled. Even after restarting, symptoms can take a few days to fade.
A few practical steps can also make them easier to live with:
Take your dose at the same time each day, and set a reminder Try turning your head and eyes more slowly, since sideways movements can trigger zaps Don't make the next dose reduction until symptoms have eased Ask your prescriber about smaller reductions as the dose gets lower No treatment has been found that reliably stops brain zaps on its own. A 2019 analysis of SSRI tapering suggested that slower reductions, with smaller steps near the end, lower the risk of withdrawal symptoms. Our guide to tapering off antidepressants explains how that usually works.
Can you get brain zaps without stopping an antidepressant?
Most brain zaps are linked to a drop in antidepressant level, which includes missed or late doses even if you never meant to stop. Electric-shock sensations can have other causes too. If they happen with no change to any medicine, or come with numbness, weakness or vision problems, see a doctor.
One example is Lhermitte's sign , a brief buzzing sensation that runs down the neck into the spine. It can be triggered by bending the neck forward, and it's seen in multiple sclerosis. It feels different from brain zaps, but only a doctor can tell what's causing new symptoms.
What to tell your prescriber about brain zaps
Brain zaps are easier to manage when your prescriber knows exactly when they started, how often they happen and what makes them worse. A few days of notes is enough to show whether they're linked to a missed dose or a reduction. Before your appointment, note:
Which medicine you take, your current dose and any recent changes, with dates When the brain zaps started, and whether it was after a missed or late dose How often they happen each day, and whether they're easing or getting worse What sets them off, such as moving your eyes or head Other symptoms, such as dizziness, irritability, poor sleep or low mood How much they affect your sleep, work or driving You can also check other withdrawal symptoms you've noticed with our SSRI and SNRI withdrawal symptom checker . If you're having thoughts of harming yourself, seek help straight away: in the US, call or text 988. Elsewhere, find a crisis line near you .
Open the taper calculator The withClaro taper calculator builds a slower, step-by-step reduction plan to discuss with your prescriber, and the withClaro app helps you log symptoms like brain zaps at each step.
Frequently asked questions Do brain zaps hurt? They're usually described as a sudden jolt or electric-shock feeling, and they can be very unpleasant. If they're painful, or come with headaches that don't ease, tell your prescriber.
Are brain zaps a sign that my depression is coming back? No. Brain zaps are a withdrawal symptom, not a symptom of depression. NICE notes that relapse doesn't usually happen as soon as you stop or lower a dose. If your mood is also dropping, tell your prescriber, so you can work out together what's going on.
Will taking my antidepressant stop brain zaps? If they came from a missed dose, taking your usual dose often helps, though NICE says symptoms can take a few days to fade. If they started during a planned reduction, talk to your prescriber before changing anything. Restarting a higher dose is a decision to make together.
Can switching antidepressants cause brain zaps? It can, because the first medicine is being reduced or stopped. NICE notes that faster changes are sometimes used when switching, which can raise the risk of withdrawal symptoms. Ask your prescriber how the switch will be done and what to watch for.
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Sources Papp A, Onton JA. Brain zaps: an underappreciated symptom of antidepressant discontinuation. Prim Care Companion CNS Disord. 2018;20(6):18m02311 U.S. Food and Drug Administration. Zoloft (sertraline hydrochloride) prescribing information. DailyMed National Institute for Health and Care Excellence. NG222: Depression in adults: treatment and management. 2022 Royal College of Psychiatrists. Stopping antidepressants Davies J, Read J. A systematic review into the incidence, severity and duration of antidepressant withdrawal effects: are guidelines evidence-based? Addict Behav. 2019;97:111–121 Horowitz MA, Taylor D. Tapering of SSRI treatment to mitigate withdrawal symptoms. Lancet Psychiatry. 2019;6(6):538–546 MS Society. Lhermitte's sign Claro articles are for self-monitoring and educational purposes only. They are not a medical device, therapist, or diagnostic tool, and do not replace care from your prescribing clinician. If you are in crisis, contact your care team, emergency services, the Samaritans (UK: 116 123), or the Crisis Text Line (US: text HOME to 741741).
