Switching antidepressants means moving from one medication to another under your prescriber's guidance, usually because the first one has not helped enough or its side effects are hard to live with. The method depends on which two medications are involved, how long you have been taking the first, and your own health history. Some switches can be done within days. Others take weeks, and some need a planned gap of weeks.
Part of our guide: A Patient’s Guide to Psychiatric Medication
Do not try to switch on your own, and do not stop one antidepressant and start another from an old prescription. Certain combinations can be dangerous, and stopping suddenly can cause withdrawal-type symptoms. Your prescriber will set the exact steps, so this article explains the process in general and does not give doses or schedules.
If you are thinking about suicide or self-harm, or are worried about someone else: call or text 988 (988 Suicide & Crisis Lifeline), call 911 or go to the nearest ER.
Antidepressants carry an FDA boxed warning: they increased the risk of suicidal thoughts and behavior in pediatric and young adult patients in short-term studies, and all treated patients should be closely monitored for worsening and for new suicidal thoughts and behaviors. The label says this matters especially in the first few months of treatment and at times of dose changes, and a switch usually involves both.
When switching makes sense, and when it may not
Common reasons include an inadequate treatment response or unacceptable adverse effects. Switching for side effects is a straightforward reason. Switching because a medication has not helped deserves a closer look, since the research is more mixed than many people expect.
- In the NIMH-funded STAR*D study, about one in four people had a remission after switching following an unsuccessful SSRI (17.6% to 24.8% on the study's primary rating scale), and bupropion, sertraline and venlafaxine performed similarly. A 2025 reanalysis of the same data reported 16.2% to 19.3% on that scale. It is a preprint that has not been peer reviewed, so treat its figures as unconfirmed.
- A 2018 meta-analysis found that switching was not superior to staying on the first antidepressant in the few trials it reviewed, and concluded there is no high-level evidence that switching is effective compared with simply continuing. A later German overview by overlapping authors, summarizing their own analyses, favored combining two antidepressants over repeated switching. Combining has its own interaction risks. None of this is a reason to stay on, stop or combine medications without your prescriber.
- STAR*D's add-on and switch groups cannot be compared directly, because most participants accepted only one strategy.
So before switching, it is reasonable to ask whether the first medication has had enough time, whether the dose has been optimized, whether doses were being missed, whether the diagnosis still fits and whether another approach would be better. Options may include adjusting the dose, adding therapy, adding another medication or considering other treatments. This article on what to do if medication isn't working covers those questions, and how long antidepressants take to work covers timing.
If you have been treated with at least two antidepressants without improvement, NIMH describes that as treatment-resistant depression, and the conversation may widen. Spravato is FDA-approved for adults with treatment-resistant depression and is self-administered under supervision in a certified setting. It carries its own FDA boxed warning covering sedation, dissociation, respiratory depression, abuse and misuse, and suicidal thoughts and behaviors.
What your prescriber will want to review
Before choosing a method, a prescriber will usually go over what you take now and for how long, what you have tried before and how it went, your other health conditions and medications, any personal or family history of bipolar disorder, and whether you are pregnant or planning to be. Bring what records you have.
The main ways a switch is done
A 2016 review in Australian Prescriber describes four general approaches. This table rests on that one narrative review, which is from Australia and is not a US guideline. The review notes that switches must be undertaken cautiously and under close observation, and that individual factors may require considerable changes to any strategy. None of these approaches applies to MAOIs, which have strict rules of their own, covered below. Which one fits is a medical decision for you and your prescriber.
| Approach | What happens | Trade-offs |
|---|---|---|
| Conservative switch | First medication is gradually reduced and stopped, then a drug-free gap before the new one starts | Very low interaction risk; takes longer, with a period without treatment that carries a risk of worsening illness, and possible discontinuation symptoms |
| Moderate switch | First medication is gradually reduced and stopped, then a shorter gap before the new one starts | Low interaction risk; discontinuation symptoms may occur |
| Direct switch | First medication stops and the new one starts the next day | Quick and simple; discontinuation symptoms are likely, interaction risk is substantial, needs clinical expertise and is feasible only in selected cases |
| Cross-taper | First medication is reduced as the new one is introduced, so you take both for a time | Often used when relapse risk is high; carries interaction and side effect risks, needs clinical expertise and is feasible only in selected cases |
Why some switches need a longer gap
Two situations are especially strict, and both come straight from FDA labeling.
MAOIs. Monoamine oxidase inhibitors are an older group of antidepressants. The sertraline label requires at least 14 days between stopping an MAOI antidepressant and starting sertraline, and at least 14 days after stopping sertraline before starting an MAOI. The risk is serotonin syndrome, and the label lists this as a contraindication.
Fluoxetine (Prozac). Fluoxetine stays in the body for a long time. The fluoxetine label says at least 5 weeks should be allowed after stopping it before starting an MAOI, and it notes that changes in dose will not be fully reflected in the blood for several weeks. The Australian Prescriber review calls it a particular challenge for switching because of its long half-life.
These intervals are label requirements for prescribers, not something to plan yourself. Other medications can matter too, including the antibiotic linezolid and intravenous methylene blue, which the sertraline label also lists under its MAOI contraindication. Make sure every clinician knows what you take. NIMH advises telling your provider about all the medications you are taking, and that includes supplements and herbal products such as St. John's wort, which the sertraline label names among products that raise serotonin syndrome risk.
What to watch for during a switch
- Serotonin syndrome. The review notes that mild symptoms include agitation and tremor, and severe cases can include high body temperature, muscle jerks and delirium, and can progress to convulsions, organ failure and death. Call 911 or go to the nearest ER for severe symptoms. Call your prescriber right away about milder ones.
- Discontinuation symptoms. The label lists nausea, sweating, dysphoric mood, irritability, agitation, dizziness, sensory disturbances, tremor, anxiety, confusion, headache, lethargy, emotional lability, insomnia, hypomania, tinnitus and seizures after stopping serotonergic antidepressants, particularly after stopping abruptly. Telling discontinuation symptoms from relapse can be tricky, so report what you notice.
- Return of depression. The review warns that relapse of depressive symptoms, including suicidal thoughts and self-harm, can occur as a dose is lowered or stopped.
- Mania or hypomania. The sertraline label warns that antidepressants may bring on mania in people with bipolar disorder. Feeling unusually energized, needing little sleep or having racing thoughts warrants a prompt call.
Practical steps for your switch
- Ask for the plan in writing: what to take each day, for how long, and what to do if you miss a dose.
- Ask when your first check-in will be and who to call between visits.
- Check that your pharmacy has the new prescription and that old refills are cancelled, so you do not take both by mistake.
- Keep a brief daily note of mood, sleep and new symptoms.
- Let someone close to you know, and ask them to tell you if they see changes.
- Avoid new supplements or over-the-counter medications until you have checked with your prescriber or pharmacist.
Past experience can also help your prescriber plan. The review notes that earlier withdrawal symptoms are among the predictors of later discontinuation problems. Share what happened during past medication changes. This article on how to talk to your provider about changing medications offers ways to prepare.
If you are considering a switch and want a careful review of your history, see medication management at Mind Body Seven. You can request a consultation, and the intake team confirms fit, scheduling and costs.
FAQs
Will I feel worse during a switch?
Some people have a harder stretch, whether from discontinuation symptoms, new side effects or a return of depression while the new medication builds. Others notice little. Ask your prescriber what to expect with your specific medications and report changes early.
Do I start over on the timeline with a new antidepressant?
Generally, yes. Allow time for the new medication to take effect, since NIMH says antidepressants usually take 4 to 8 weeks to work. Ask your prescriber how the timeline applies to your plan.
Can my teen switch antidepressants?
Switches in teens should have close follow-up. The Zoloft Medication Guide says antidepressants may increase suicidal thoughts or actions in some people 24 years of age and younger. Parents should know the warning signs. See child and adolescent psychiatry.
Does insurance cover a new medication during a switch?
Coverage varies, and some plans require prior authorization. See refills, prior authorizations and shortages for how this usually works, and check your plan before your supply runs out.
