Stopping Lexapro abruptly can trigger a cluster of physical and psychological symptoms known as discontinuation syndrome, sometimes starting within two to four days of your last dose. Lexapro (escitalopram) is classified as a moderate-risk antidepressant for this reaction, and a 2024 meta-analysis in The Lancet Psychiatry found that escitalopram is associated with higher frequencies of discontinuation symptoms compared to many other antidepressants. Roughly one in six people who stop an antidepressant will experience symptoms specifically tied to discontinuation, and about one in 35 will have severe symptoms.
Why Your Brain Reacts to Sudden Stopping
Lexapro works by blocking the recycling of serotonin in your brain, which keeps more of it available between nerve cells. Over weeks and months on the medication, your brain adapts to this higher level of serotonin by dialing down the sensitivity of its serotonin receptors. This adjustment is normal and expected.
When you stop cold turkey, the drug clears your bloodstream relatively quickly. Lexapro has a half-life of about 27 to 32 hours, meaning roughly half the medication is gone within a day and a half. But your receptors don’t bounce back on the same schedule. They stay in their dialed-down state for days to weeks. The result is a temporary serotonin shortage that your dampened receptors can’t compensate for. This imbalance can also ripple into other brain chemical systems involved in mood, energy, and anxiety, which is why withdrawal symptoms can feel so wide-ranging.
Common Withdrawal Symptoms
Symptoms typically appear within two to four days of your last dose. The most frequently reported ones include:
- Flu-like feelings: fatigue, headache, body aches, and sweating
- Digestive upset: nausea and sometimes vomiting
- Dizziness and lightheadedness
- Brain zaps: brief electric shock-like sensations, often in the head or down the spine
- Sleep disruption: insomnia, vivid dreams, or nightmares
- Mood changes: anxiety, irritability, agitation, or confusion
The FDA’s medication guide for Lexapro also lists tinnitus (ringing in the ears), hypomania (an unusually elevated or wired mood), and in rare cases, seizures as possible discontinuation effects. Most people experience mild to moderate symptoms, but that doesn’t mean they’re trivial. Brain zaps in particular can be alarming if you don’t know what’s happening, and the combination of dizziness, nausea, and mood swings can genuinely disrupt daily life.
How Long Symptoms Typically Last
For most people, the worst of it hits in the first week and gradually fades over one to three weeks. The timeline tracks loosely with how long your serotonin receptors need to readjust. Some people feel noticeably better within a few days; others deal with lingering symptoms, especially brain zaps and sleep disturbances, for several weeks. People who were on higher doses or who took Lexapro for a longer period tend to have a harder and longer withdrawal.
Withdrawal vs. Relapse of Depression
One of the most confusing parts of stopping Lexapro is figuring out whether what you’re feeling is withdrawal or your original depression coming back. The two can look similar on the surface, since both involve mood changes, anxiety, and sleep problems. But there are reliable ways to tell them apart.
Timing is the biggest clue. Withdrawal symptoms show up within days of stopping or reducing the dose. A true relapse of depression typically takes weeks, months, or even longer to develop. The nature of the symptoms also differs. Withdrawal almost always includes physical symptoms alongside the mood changes: dizziness, brain zaps, nausea, or flu-like achiness. A depressive relapse is primarily psychological. Finally, withdrawal symptoms tend to follow a “wave” pattern where they peak and then gradually resolve, and they respond quickly if you restart the medication. A relapse builds more slowly and steadily.
If you stopped cold turkey and feel terrible three days later, it’s very likely withdrawal. If you tapered off properly and start feeling low six weeks later without any physical symptoms, that’s more consistent with relapse.
What a Safe Taper Looks Like
Clinical guidelines recommend reducing your dose gradually rather than stopping all at once. The general approach is to decrease by about 25% of your daily dose every one to four weeks. So if you take 20 mg, a first step might be dropping to 15 mg for a few weeks, then to 10 mg, and so on.
The final steps matter the most. Going from a low dose to zero is where many people hit trouble, because even small absolute reductions represent a large percentage change at that point. Guidelines recommend slowing down at the end, reducing by as little as 5 to 12.5% of the dose per month during the last stretch. If symptoms flare during a taper, the typical advice is to hold at the current dose for six to twelve weeks until you stabilize, then resume the taper at an even slower rate.
This process requires coordination with whoever prescribed your medication. Lexapro comes in tablets and liquid form, and the liquid can make very small dose reductions easier to manage. Some people need months to fully taper, and that’s completely normal.
If You’ve Already Stopped Cold Turkey
If you’re reading this because you’ve already quit abruptly and you’re feeling the effects, restarting the medication at your previous dose will typically relieve symptoms within a day or two. From there, you and your prescriber can set up a gradual taper. There’s no medical benefit to white-knuckling through severe withdrawal if you have the option to restart and taper properly.
If your symptoms are mild and manageable, they will likely resolve on their own within a few weeks. Staying hydrated, keeping a regular sleep schedule, and avoiding alcohol can help your body recalibrate. But watch for worsening mood symptoms, confusion, or any sign of seizure activity, which warrants immediate medical attention.