How to Stop Taking SSRIs and Antidepressants Safely

What Is Antidepressant Discontinuation Syndrome?

Antidepressant discontinuation syndrome (ADS) is a cluster of symptoms that can occur when an antidepressant — particularly an SSRI or SNRI — is stopped abruptly or the dose is reduced too quickly. It affects approximately 20–40% of patients who stop these medications suddenly.

Symptoms typically begin within 2–4 days of stopping and include:

• FINISH mnemonic: Flu-like symptoms, Insomnia, Nausea, Imbalance/dizziness, Sensory disturbances (electric shock sensations called "brain zaps"), Hyperarousal/anxiety
• Irritability and mood changes
• Vivid dreams or nightmares
• Diarrhea

Discontinuation syndrome is not the same as relapse of depression — it is a physiological response to the sudden removal of a drug that the brain has adapted to. Symptoms typically resolve within 1–2 weeks if the medication is restarted or tapered slowly.

Which Antidepressants Cause the Most Discontinuation Symptoms?

Safe Tapering Schedules

The general principle is to reduce the dose by no more than 10–25% every 2–4 weeks. Slower tapers are needed for longer duration of use, higher doses, and drugs with short half-lives (paroxetine, venlafaxine).

Sertraline (Zoloft) Taper Example

Starting dose: 100 mg/day

1. Weeks 1–2: 75 mg/day
2. Weeks 3–4: 50 mg/day
3. Weeks 5–6: 25 mg/day
4. Week 7: Discontinue

Venlafaxine (Effexor) Taper Example (Requires Slower Taper)

Starting dose: 150 mg/day

1. Weeks 1–2: 112.5 mg/day
2. Weeks 3–4: 75 mg/day
3. Weeks 5–6: 37.5 mg/day
4. Weeks 7–8: 37.5 mg every other day
5. Week 9: Discontinue

For paroxetine and venlafaxine, some patients require an even slower taper — reducing by as little as 5–10% per month using liquid formulations or compounded preparations.

Fluoxetine (Prozac): Often No Taper Needed

Fluoxetine has a very long half-life (4–6 days for the parent drug, 4–16 days for its active metabolite norfluoxetine). This means the drug effectively tapers itself over 1–2 months after the last dose. For most patients, abrupt discontinuation of fluoxetine does not cause significant discontinuation symptoms. However, a brief taper is still recommended for patients on high doses (>40 mg) or with a history of discontinuation symptoms.

Distinguishing Discontinuation Syndrome from Relapse

This distinction is clinically important:

• Discontinuation syndrome — begins within 2–4 days of stopping; includes physical symptoms (dizziness, nausea, brain zaps); resolves within 1–2 weeks; responds to restarting the medication
• Relapse of depression — begins 2–4 weeks or more after stopping; primarily mood symptoms (persistent sadness, hopelessness, loss of interest); does not resolve spontaneously; requires treatment

When Should You Stop an Antidepressant?

The decision to stop an antidepressant should be made with your prescriber. General guidelines suggest:

• First episode of depression: continue for at least 6–12 months after remission
• Second episode: continue for at least 2 years
• Three or more episodes: consider indefinite maintenance therapy
• Never stop during a period of high stress or life change
• Ensure you have a follow-up appointment scheduled within 2–4 weeks of stopping

References

1. Fava GA, et al. Withdrawal symptoms after selective serotonin reuptake inhibitor discontinuation: a systematic review. Psychother Psychosom. 2015;84(2):72-81.
2. Horowitz MA, Taylor D. Tapering of SSRI treatment to mitigate withdrawal symptoms. Lancet Psychiatry. 2019;6(6):538-546.
3. Schatzberg AF, et al. Antidepressant discontinuation syndrome: consensus panel recommendations for clinical management and additional research. J Clin Psychiatry. 2006;67(Suppl 4):27-30.