Brain Zaps: Why They Happen and How Long They Last

Published by Joseph, EditorCompiled from cited sources · not yet medically reviewedUpdated Oct 29, 20264 sources

Need help now? SAMHSA’s National Helpline is free, confidential and open 24/7 in English and Spanish: 1-800-662-4357. In a mental health crisis, call or text 988. In an emergency, call 911.

For information only, not medical advice. Talk to a doctor before stopping or changing any medication. Medical disclaimer

⚠ Medical warning

Don’t stop your antidepressant suddenly or change your dose without talking to your prescriber. A gradual taper lowers the risk of withdrawal symptoms. If you have thoughts of suicide, call or text 988 now.

Quick answer

‘Brain zaps’ are brief electric-shock sensations in the head, arms or legs that many people feel when reducing or stopping an antidepressant. RCPsych says turning your head to the side can make them worse. The FDA labels for Lexapro and Effexor list electric-shock sensations as discontinuation symptoms. They usually start within days of a dose change and fade as withdrawal settles, often over weeks, but for some people longer. The cause isn’t fully understood. Restarting the previous dose usually eases symptoms quickly, so talk to your prescriber.

Brain zaps withdrawal timeline at a glance

When did you last use or take it?

⚠ Medical warning (read before using this)

This places the typical ranges from this article's sources on your date. It is not a prediction or a diagnosis, and being past a phase does not mean symptoms or risks are over.

A rough guide from published sources, not medical advice. Everyone is different.

Phase	When	What you may feel	Severity	Red flags
Onset	Within days of a reduction, stop or missed dose	Brief shock or ‘zap’ sensations, often with eye or head movement; Dizziness	Moderate	—
Most noticeable	First 1 to 2 weeks for many people	Zaps several times a day; Dizziness, other withdrawal symptoms	Moderate	Thoughts of suicide or self-harm: call or text 988 now; A seizure, fainting, or new weakness or numbness: call 911 (not typical of brain zaps)
Fading or lingering	Weeks; months for some people	Less frequent zaps	Mild	—

Print a daily symptom log for this timeline · My quit tracker

Symptoms, phase by phase

RCPsych describes ‘the feeling of an electric shock in your arms, legs, or head’, sometimes called zaps, and notes that turning your head to the side can make them worse. It says symptoms like zaps are something people often haven’t felt before, which helps tell withdrawal apart from depression returning. The Lexapro label lists ‘sensory disturbances (e.g., paresthesias such as electric shock sensations)’, and the Effexor XR label lists ‘shock-like electrical sensations’. Brain zaps aren’t well studied, and we haven’t found strong evidence on exactly why they happen.

Onset: Within days of a reduction, stop or missed dose

Brief shock or ‘zap’ sensations, often with eye or head movement
Dizziness

Most noticeable: First 1 to 2 weeks for many people

Zaps several times a day
Dizziness, other withdrawal symptoms

Fading or lingering: Weeks; months for some people

Less frequent zaps

What makes withdrawal longer or shorter

Which antidepressant. Shorter-acting ones tend to cause withdrawal symptoms sooner.
How fast you reduce. Faster reductions make withdrawal symptoms more likely.
How long you’ve taken it. Longer treatment usually means a slower taper is needed.
Missed doses. Even one missed dose can trigger symptoms with some medicines.

When to see a doctor or get help now

If zaps are disrupting daily life, your prescriber may restore the previous dose and slow the taper.
Call 911 for a seizure, fainting, or new weakness or numbness. These aren’t typical brain zaps.
Call or text 988 for suicidal thoughts.
Don’t drive if zaps or dizziness affect your control.

Not sure where to start? Call SAMHSA’s free, confidential helpline at 1-800-662-4357, 24/7. See Get Help.

Tapering

RCPsych says most people can stop antidepressants gradually over weeks or months, and those on them for a long time usually need to taper more slowly, at a pace they find comfortable. The Lexapro label says if intolerable symptoms occur, resuming the previous dose may be considered before tapering more gradually. Plan this with your prescriber.

Tips for getting through it

Move your head and eyes slowly
Don’t skip doses during a taper
Keep a diary of zaps to share with your prescriber
Remember they’re a recognized withdrawal symptom, listed by RCPsych and in FDA labels

Frequently asked questions

How long do brain zaps last?

Usually as long as the withdrawal phase, often weeks, though RCPsych says withdrawal symptoms can last months for some people.

Are brain zaps dangerous?

They’re a recognized antidepressant withdrawal symptom. Their cause isn’t understood, but they can be distressing and affect driving.

Why do brain zaps happen when I move my eyes or head?

RCPsych notes that turning your head can make them worse. The exact mechanism isn’t understood.

Can you get brain zaps from missing a dose?

Yes, with some antidepressants even one missed dose can cause withdrawal symptoms.

Next steps

Talk to others going through it. Share your experience or ask questions on the Antidepressants & Other Prescriptions board in our community forum. Forum posts are personal experiences, not medical advice. Please read the community guidelines.

Sources

Last reviewed: October 25, 2026. Researched and written by Withdrawal Timelines from the cited sources. This article has not yet been reviewed by a medical professional. See How We Review and our Medical Disclaimer. This is general information, not medical advice.

More timelines

View all