Cymbalta Withdrawal: Symptoms, Brain Zaps and How Long It Lasts
Cymbalta withdrawal is known for dizziness, nausea and brain zaps, and it can be hard for some people.
By withClaro Editorial · 2026-11-02 · 4 min read
Clinical section reviewed by Dr. Jason Tan , Consultant Psychiatrist, on October 27, 2026.
Key takeaways The FDA label lists dizziness, headache, nausea, diarrhea, tingling, irritability, insomnia and anxiety after stopping Cymbalta, and recommends a gradual reduction. In 100 r/cymbalta threads, brain zaps were the symptom people named most, followed by dizziness and nausea. In Lilly's 2005 analysis of trials where duloxetine was stopped suddenly, 44.3% of people had withdrawal symptoms, against 22.9% after stopping placebo; most rated them mild or moderate. Of 90 people on Reddit who gave a length, the typical answer was about 2 weeks, but the range ran to months. On this page
What 274 people on r/cymbalta said about stopping Cymbalta How long does Cymbalta withdrawal last? Why is Cymbalta withdrawal hard for some people? Is it Cymbalta withdrawal or depression coming back? What should you tell your prescriber before stopping Cymbalta? Cymbalta (duloxetine) withdrawal is common and, for some people, hard. In Lilly's pooled analysis of trials where it was stopped suddenly, 44.3% of people had symptoms, against 22.9% after stopping placebo. In the FDA trials, dizziness, headache, nausea, diarrhea, tingling, irritability, vomiting, insomnia, anxiety, sweating and fatigue were more common after stopping Cymbalta than after stopping placebo. This happened after both sudden and tapered stops. The label recommends lowering the dose gradually whenever possible.
What 274 people on r/cymbalta said about stopping Cymbalta
Brain zaps were what people on r/cymbalta named most, by 75 people, well ahead of dizziness and nausea. We read 100 recent threads about stopping Cymbalta, comments included, and 274 people described their own experience of stopping or cutting down. People with a hard time are more likely to post, so treat this as a range of experiences rather than odds.
Of the 134 who said how they stopped, 58 tapered over a month or more, 21 over less than a month, and 55 stopped all at once. The table counts symptoms from all 274, and one person can name several:
Symptom people named Of 274 people Brain zaps 75 Dizziness 39 Nausea or flu-like feeling 39 Sleep problems or vivid dreams 29 Anxiety or panic 27 Headache 26 Low mood or crying 25
Not everyone struggled: 31 people said they had no symptoms or barely any. Of the 66 who described how bad it was, 41 called it severe, 1 moderate and 24 mild. Of the 176 who said where they ended up, 69 were still tapering, 51 were off but still struggling, 33 were off and doing fine, and 23 went back on.
One person on r/cymbalta wrote:
I just felt off and had some brain zaps.
How long does Cymbalta withdrawal last?
For many people, a couple of weeks, but not for everyone. Of 90 people on r/cymbalta who gave a length, the typical answer was about 2 weeks, while some named months. In Lilly's 2005 pooled analysis, less than half of withdrawal symptoms had gone by the end of the studies, and of those that did, about two-thirds went within a week. Most people in those trials rated their symptoms mild or moderate, while on Reddit more called them severe. Trials follow everyone for a short time; Reddit collects people who are still struggling and want help.
If symptoms are still strong after a few weeks, or keep growing rather than fading, call your prescriber, because it may be withdrawal that needs a slower plan or a return of depression.
Why is Cymbalta withdrawal hard for some people?
Duloxetine has a half-life of about 12 hours, so levels fall quickly after a dose is cut or missed. The label notes that withdrawal symptoms were seen after both sudden and tapered stops. In Lilly's trials, symptoms were more common at the highest dose studied than at smaller ones. How long someone has taken it, the dose and the pace of stopping all seem to matter, though no one can predict who will struggle.
Brain zaps are brief jolts, often described as an electric shock or a buzz in the head. People talk about them most; for duloxetine they are described in case reports, and in the clinical data they appear as tingling, or paresthesia. The label lists electric-shock sensations among reports after stopping other SSRIs and SNRIs.
Is it Cymbalta withdrawal or depression coming back? Medically reviewed by Dr. Jason Tan on October 27, 2026, this section only.
If you can't tell, note when each symptom started relative to your last dose change and what it feels like, and bring that to your prescriber. The clinical view:
For many people symptoms are mild and pass within a couple of weeks. For others they are severe or last for months, and there is no reliable way to know in advance, although longer use, higher doses, medications that leave the body quickly and withdrawal on a past attempt all raise the risk. Stopping all at once carries the highest risk.
Withdrawal tends to start within days of a cut (later with fluoxetine) and includes physical symptoms, like brain zaps. It often eases soon after the previous dose is restarted. A relapse usually builds more slowly, over weeks.
If symptoms during a reduction are hard to bear, talk to your prescriber. The usual step is to go back to the last dose that felt stable, then reduce more slowly. Some changes need a call the same day: mood dropping fast, feeling hopeless, or thoughts of harming yourself. If you're having thoughts of harming yourself, contact emergency services or a crisis line straight away. In the US, call or text 988. In the UK, call Samaritans on 116 123. Elsewhere, find a crisis line near you .
What should you tell your prescriber before stopping Cymbalta?
Plan the stop with your prescriber before you cut a dose, including what to do if symptoms come. It helps to tell them:
Why you want to stop, and how long you have been on Cymbalta. Your current dose, and what it was prescribed for. Whether you have had withdrawal or a relapse before. Other medications you take, including for pain. Big events coming up, such as exams, travel or a new job. More on doses in Cymbalta dosage .
Open the duloxetine taper calculator Cymbalta withdrawal can be hard, and a slow, planned taper lowers the risk. The withClaro taper calculator builds a gradual plan for duloxetine to discuss with your prescriber.
Frequently asked questions Can you stop Cymbalta cold turkey? The label recommends a gradual reduction whenever possible. Plan the stop with your prescriber.
Can you get Cymbalta withdrawal from a missed dose? Some people do: with a half-life of about 12 hours, levels drop noticeably within a day. The label says to take a missed dose as soon as you remember, unless it is almost time for the next one, and never to take two at once. Tell your prescriber if it keeps happening.
What are brain zaps? Brief jolts that feel like an electric shock or buzz in the head. They are a known symptom after stopping duloxetine, and 75 of 274 people on Reddit named them. Note when they started relative to your last dose cut and tell your prescriber.
Can I open Cymbalta capsules to taper? The label says to swallow capsules whole, not open them. Ask your prescriber and pharmacist what lower-dose options exist for your plan.
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Sources Perahia DGS, et al. Symptoms following abrupt discontinuation of duloxetine treatment in patients with major depressive disorder. Journal of Affective Disorders, 2005 CYMBALTA (duloxetine) prescribing information, Eli Lilly and Company, revised August 2023 Pitchot W, Ansseau M. Shock-like sensations associated with duloxetine discontinuation. Annals of Clinical Psychiatry, 2008 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).