Stopping Lexapro (escitalopram) abruptly can trigger a cluster of physical and psychological symptoms known as antidepressant discontinuation syndrome. Symptoms typically begin one to three days after your last dose, though they can start within hours or take over a week to appear. Most people experience some combination of flu-like feelings, dizziness, mood changes, and unusual sensory disturbances, and the severity depends on how long you’ve been taking the medication and what dose you’re on.
Why Stopping Suddenly Causes Symptoms
Lexapro works by keeping more serotonin available in the spaces between your brain cells. Over months or years of use, your brain adapts to this higher level of serotonin activity. Receptors become less sensitive, and signaling pathways recalibrate to treat the drug-assisted level as the new normal.
When you remove the medication overnight, your brain doesn’t snap back instantly. It’s been tuned to operate with Lexapro in the system, and now it faces a sudden serotonin shortfall. The result is neurochemical instability: your brain needs time to readjust, and the gap between stopping the drug and completing that readjustment is where withdrawal symptoms live.
Common Withdrawal Symptoms
Discontinuation symptoms fall into a few broad categories. Physically, many people feel like they’re coming down with the flu: fatigue, headaches, body aches, sweating, nausea, and sometimes vomiting. Dizziness and lightheadedness are extremely common and can make it hard to drive or concentrate at work.
Psychologically, you may notice sharp mood swings, irritability, agitation, or a spike in anxiety that feels out of proportion to anything happening in your life. Sleep is often disrupted, with vivid dreams or nightmares that feel unusually realistic.
One of the more distinctive symptoms is paresthesia: burning, tingling, or shock-like sensations that can travel through your body. These overlap with what many people call “brain zaps,” which deserve their own explanation.
What Brain Zaps Feel Like
Brain zaps are brief, startling electrical-shock sensations inside the head. People have compared them to a jolt of cold water in the middle of a warm shower, or the bright flash of a camera firing in a dark room. They tend to come on suddenly, last a fraction of a second, and can repeat dozens of times a day.
No one has pinpointed the exact mechanism behind brain zaps yet. No neuroimaging study has directly observed what’s happening in the brain during one. The leading hypothesis is that sudden changes in serotonin levels or receptor sensitivity disrupt electrical signaling in neural circuits, particularly those involved in eye movements. Many people notice their eyes flick sideways involuntarily at the same moment a zap hits, which supports the idea that the same disrupted circuits control both processes. Individual differences in neurological sensitivity to serotonin and norepinephrine fluctuations influence how frequent and intense these zaps are, which is why some people get them constantly and others barely notice them.
Timeline: When Symptoms Start and How Long They Last
For most people, withdrawal symptoms appear within one to three days of the last dose. They tend to peak during the first week and then gradually ease. Most symptoms resolve within one to two weeks, though some people experience lingering effects for longer, especially if they were on a higher dose or took Lexapro for years.
The pattern matters here because it helps you distinguish withdrawal from relapse (more on that below). Withdrawal symptoms typically follow a “wave” pattern: they come on relatively quickly, peak, and then fade. If you’re a week in and your symptoms are getting steadily worse rather than plateauing, that’s worth paying close attention to.
Withdrawal vs. Relapse of Depression
One of the trickiest 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 since both involve mood changes, anxiety, sleep problems, and irritability. But there are practical ways to tell them apart.
Withdrawal symptoms tend to start within days of stopping, come with physical symptoms (dizziness, flu-like feelings, brain zaps) alongside the emotional ones, and follow that wave pattern of onset, peak, and resolution. They also respond quickly if you restart the medication, often improving within a day or two. A relapse of depression, by contrast, builds more gradually over weeks, involves primarily emotional symptoms without the physical package, and doesn’t follow the wave pattern. If you restart the medication for a relapse, improvement takes the usual weeks, not days.
What Makes Withdrawal Worse
Not everyone who stops Lexapro cold turkey has a rough time. Some people, particularly those on lower doses for shorter periods, get through it with mild discomfort. But several factors raise the odds of more severe symptoms. A higher dose means your brain has adapted to a bigger serotonin boost, so the drop is steeper. Longer duration of treatment gives your brain more time to entrench those adaptations. And individual biology plays a role: people metabolize the drug at different rates, and genetic variation affects how quickly your serotonin system can recalibrate on its own.
Why Tapering Matters
The standard advice to taper off Lexapro gradually exists because it gives your brain time to readjust in small increments rather than all at once. But even conventional tapering schedules (for example, cutting your dose in half and then stopping) can be too aggressive for some people. This is because the relationship between dose and effect on serotonin receptors isn’t linear. Dropping from 20 mg to 10 mg reduces serotonin receptor activity by a certain amount, but dropping from 10 mg to zero reduces it by a much larger proportion, even though the milligram difference is the same.
This insight has led to the concept of hyperbolic tapering, where dose reductions get progressively smaller as you approach zero. In practice, that might mean going from 20 mg down through 10, then 5, then 2.5, then 1.25, and so on. The challenge is that standard tablets don’t come in those tiny sizes, so a taper like this often requires liquid formulations, dissolving tablets in water, or pharmacist-compounded capsules. The Maudsley Deprescribing Guidelines, published in 2024, formalize this approach and note that the smallest widely available tablet still has a large effect on serotonin receptors, making it important to continue tapering below that dose before fully stopping.
Serious Risks of Abrupt Discontinuation
Most withdrawal symptoms are uncomfortable but not dangerous. However, stopping Lexapro cold turkey carries some serious risks in certain cases. These include suicidal thoughts, which can emerge or intensify during the destabilization period, and mania, particularly in people with underlying bipolar disorder that may not have been diagnosed. These are not common outcomes, but they are documented and they can escalate quickly.
If you’ve already stopped cold turkey and you’re experiencing thoughts of self-harm, a sense of emotional crisis that feels unmanageable, or behavior that feels unlike you (racing thoughts, extreme impulsivity, little need for sleep), those warrant immediate contact with a healthcare provider or crisis line rather than waiting to see if they pass on their own.
If You’ve Already Stopped
If you’re reading this because you’ve already quit Lexapro abruptly, the most straightforward option is to restart your previous dose. Withdrawal symptoms typically improve quickly once the medication is back in your system. From there, you can work out a gradual taper. Restarting isn’t a failure or a step backward. It’s the standard clinical approach to discontinuation syndrome.
If your symptoms are mild and you’d rather ride them out, knowing the timeline helps: expect the worst of it in the first week, with gradual improvement over the second. Stay hydrated, prioritize sleep as much as the vivid dreams allow, and keep your schedule light if possible. Physical symptoms like nausea and headaches respond to the same basic measures you’d use for a mild flu.