Discontinuation symptoms and relapse can feel alike, but they tend to differ in timing and type. Discontinuation symptoms usually start within days to about a week of stopping or cutting back an antidepressant, and often include physical sensations such as dizziness, nausea or electric shock feelings. Relapse usually develops more gradually, and looks more like your original depression or anxiety.
Part of our guide: A Patient’s Guide to Psychiatric Medication
Those patterns are guides, and they cannot settle the question for one person. Researchers themselves say the two can be hard to separate. If you feel unwell after stopping or lowering a medication, call your prescriber. Do not restart, stop or change doses on your own.
If you are thinking about suicide or are in crisis: call or text 988 (988 Suicide & Crisis Lifeline), call 911 or go to the nearest ER.
Serious changes have been reported when an antidepressant is lowered or stopped. The venlafaxine label describes suicide, suicidal thoughts, aggression and violent behavior during dose reduction or discontinuation. If mood or thoughts change sharply, treat that as urgent and use the crisis contacts above.
A side-by-side comparison
| Discontinuation symptoms | Relapse | |
|---|---|---|
| Typical start | Within 1 to 7 days in proposed SSRI criteria; usually within 1 week | Often later and gradual. A 2025 review says later depression is more likely relapse |
| Common features | Dizziness, nausea, headache, insomnia, irritability, tremor, sensory disturbances such as electric shock sensations | Low mood, loss of interest, changes in sleep and energy, returning worry, in the pattern you have had before |
| Course | Often mild and short, lasting one to two weeks in one older review, but it can be protracted and severe for some | Tends to persist or worsen until treated |
| If the medication is resumed | Older reviews report rapid improvement when it is restarted. Restarting is your prescriber's decision and should not be tried as a test at home. The fluoxetine label describes a clinician considering it if symptoms are intolerable | Improvement usually takes longer, since antidepressants usually take 4 to 8 weeks to work |
Clues can overlap. Anxiety, irritability, low mood and insomnia appear on both lists, and the sertraline label also lists dysphoric mood and emotional lability as possible discontinuation reactions.
Why the difference matters
The two situations can call for different responses, and mixing them up has costs in both directions. If discontinuation symptoms are mistaken for relapse, someone may conclude they can never come off a medication, or may be given treatment they do not need. An older review points to this potential for misdiagnosis and inappropriate treatment. If relapse is mistaken for discontinuation, someone may wait through weeks of worsening depression expecting it to pass on its own.
You do not need to make this call alone. Your job is to notice what is happening and report it, and your prescriber's job is to interpret it with you.
How common are discontinuation symptoms?
Estimates differ, in part because they depend on who was studied, how long they took medication and how symptoms were counted.
- A 2024 review of 79 studies found about 31 percent had at least one symptom after stopping an antidepressant, and 17 percent had one after stopping a placebo. After allowing for symptoms also seen with placebo, its authors put the incidence at about 15 percent, or one in six to seven people. Severe symptoms were reported in about 2.8 percent after stopping antidepressants, compared with 0.6 percent after stopping placebo.
- A separate meta-analysis reported a higher figure, about 43 percent, and found rates rose with longer treatment.
- A 2025 analysis of 50 studies found dizziness to be the most common symptom. Nausea, vertigo and nervousness were also more likely than after stopping placebo, while depressed mood was not.
Take that last result with some care. The authors acknowledged that participants in most studies had taken the antidepressant for a relatively short period, and that discontinuation symptoms may be long lasting in some people. Your experience may differ if you have taken a medication for years.
Which medications are more often linked to symptoms?
The 2024 review found higher frequencies with desvenlafaxine, venlafaxine, imipramine and escitalopram, and higher severity with imipramine, paroxetine and either desvenlafaxine or venlafaxine. A shorter half-life and longer treatment are also described as risk factors.
Fluoxetine is an exception on timing. Because of its long elimination half-life, changes in dose take several weeks to be fully reflected in the blood, and the label says the gradual decline may minimize the risk of discontinuation symptoms. The 2025 analysis notes that symptoms generally peak at one to two weeks after stopping, except with fluoxetine. So if you stopped fluoxetine some time ago, tell your prescriber even if the timing does not seem to fit.
What is known about relapse risk
Relapse is a real risk, separate from discontinuation effects. In a 2021 trial in primary care, adults who felt well enough to consider stopping were assigned either to continue or to come off their antidepressant. By 52 weeks, relapse occurred in 56 percent of those assigned to stop and 39 percent of those assigned to continue. People assigned to stop also had more symptoms of depression, anxiety and withdrawal.
That does not mean no one should ever stop. It means stopping is worth doing with a plan and with follow-up. A Cochrane review noted that withdrawal symptoms may have confounded relapse findings across its studies, all of which were at high risk of bias. Honest uncertainty remains. For a broader view of the decision, see getting off psychiatric medications safely.
If you are thinking about stopping
Planning ahead makes both problems easier to spot. Before making any change, consider raising these with your prescriber:
- Why you want to stop, and whether now is a good time given your stress, sleep and upcoming events.
- How the plan will work for your specific medication. The labels recommend gradual reduction whenever possible, and your prescriber sets the plan. This article does not offer a schedule because it needs to be individual.
- What your own early warning signs of relapse look like, written down while you feel well.
- Who you will call, and how soon you will be seen, if symptoms appear.
- Whether someone close to you can tell you if they notice changes.
What to do if you feel unwell
These steps can help your prescriber sort out what is happening.
- Call your prescriber. Do so soon, and sooner if symptoms are severe. Do not wait out severe symptoms alone, and do not change your dose on your own.
- Write down the timeline. Note the medication, when you last took it, any dose change and the day each symptom started. Include missed doses, since these can matter. An older review urges close questioning about accidental or purposeful stopping when these symptoms appear.
- List what you feel by type. Separate physical sensations such as dizziness, nausea, flu-like feelings or shock sensations from emotional changes such as sadness, hopelessness or loss of interest.
- Compare with past episodes. Does this resemble how your depression or anxiety usually starts? People who know you can often help answer that.
- Note anything else that changed. Illness, poor sleep, stress, alcohol, new medications and supplements can all affect how you feel.
- Ask about next steps. Your prescriber may suggest watching, adjusting the plan or a visit. How to talk to your provider about changing medications may help you prepare.
When to seek urgent care
- Thoughts of suicide or self-harm: call or text 988, call 911 or go to the nearest ER.
- Seizures. The sertraline label lists them among possible discontinuation reactions.
- Severe confusion, or feeling unusually energized, needing little sleep or acting out of character. Hypomania is also on the label's list.
- Symptoms that leave you unable to function or care for yourself.
Where to go from here
If you are thinking about stopping or have recently stopped an antidepressant, medication management at Mind Body Seven can help you and your clinician plan next steps. You can request a consultation, and the intake team confirms fit, scheduling and costs.
FAQs
Is discontinuation syndrome the same as addiction?
They are different things, and some researchers now prefer the word "withdrawal" for these symptoms. An older review argued for the term discontinuation to avoid misunderstanding. Whatever the term, physical symptoms after stopping do not mean you misused your medication.
Can missing a few doses cause these symptoms?
It can. The venlafaxine label describes symptoms with abrupt discontinuation or dose reduction. If you missed doses and feel unwell, call your prescriber or ask your pharmacist what to do about the missed doses.
Do these symptoms mean an antidepressant can never be stopped?
No. In studies, some people stop successfully, and it can be planned with a clinician who knows your history, including how to watch for return of symptoms. Timing, medication type and how long you took it all matter. Your prescriber can tailor that plan.
