Escitalopram: uses, dosing, side effects & brands

Escitalopram Oxalate is a serotonin reuptake inhibitor used to treat Major Depressive Disorder.

The FDA classifies escitalopram as a serotonin reuptake inhibitor. Selective serotonin reuptake inhibitors (SSRIs) block the transporter that pulls serotonin back into nerve cells, so more of this mood-related chemical stays in the gaps between neurons to keep signaling. They act mainly on serotonin, which tends to mean fewer side effects than older antidepressants. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.

The label does not establish an increased risk of major birth defects or miscarriage from published epidemiologic studies. However, it names specific risks: SSRI exposure (particularly the month before delivery) is associated with a less-than-2-fold increase in postpartum hemorrhage, and exposure during pregnancy carries risks of persistent pulmonary hypertension of the newborn (PPHN) and poor neonatal adaptation. Neonates exposed late in the third trimester have developed complications (respiratory distress, feeding difficulty, jitteriness, etc.) requiring prolonged hospitalization. Animal studies showed adverse embryo/fetal effects at doses above human therapeutic levels. The label also weighs the risk of untreated depression, noting women who discontinue antidepressants are more likely to relapse, and points to a National Pregnancy Registry for Antidepressants. It does not tell patients to start or stop the drug on their own -- decisions should be made with the prescriber. This is what escitalopram's FDA label says; whether to use it in pregnancy is your prescriber's decision.

In controlled trials, patients treated with escitalopram did not differ from placebo-treated patients with regard to clinically important change in body weight. The label notes that decreased appetite and weight loss have been observed with SSRIs in children and adolescents, so weight and growth should be monitored in that group; and post-marketing reports list both increased and decreased weight. For adults, the label establishes no systematic weight effect.

The label does address alcohol. It states that in a clinical trial escitalopram did not potentiate the cognitive and motor impairment caused by alcohol, so it does not describe a disulfiram-like reaction or additive CNS depression. Even so, the label says that, as with other psychotropic medications, the use of alcohol by patients taking escitalopram is not recommended, and it advises that concomitant use of escitalopram and alcohol in depressed patients is not advised. This is what escitalopram's FDA label says; alcohol advice depends on your dose and health, so confirm with your pharmacist.

The label describes a Discontinuation Syndrome. Spontaneous reports of adverse reactions on stopping escitalopram and other SSRIs, especially when abrupt, include dysphoric mood, irritability, agitation, dizziness, sensory disturbances such as paresthesias (electric-shock sensations), anxiety, confusion, headache, lethargy, emotional lability, insomnia, and hypomania. These are usually self-limiting but serious discontinuation symptoms have been reported. The label directs that the prescriber reduce the dose gradually rather than stop abruptly whenever possible and monitor for these symptoms; if intolerable symptoms occur after a dose decrease or discontinuation, the prescriber may resume the prior dose and then decrease more gradually. This withdrawal guidance is not in the boxed warning (the boxed warning concerns suicidal thoughts and behaviors). Do not stop escitalopram on your own — any change is a prescriber-managed decision.

The elimination half-life of escitalopram is about 27 to 32 hours — that is how long the body takes to clear half of a dose. This is the terminal (elimination) half-life of escitalopram itself; the drug's metabolites do not meaningfully add to its activity or duration. The half-life is longer in some people — about 50% longer in older adults and roughly doubled in those with reduced liver function. Half-life is not the same as how long a drug test can detect the drug, and it varies with age, kidney and liver function.

It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run escitalopram against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.

We track 2 escitalopram-containing products in the U.S.: Lexapro and Escitalopram Oxalate. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.

Across the brands we track, escitalopram is currently marketed as tablet, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.

Yes. Our catalog lists 1 generic escitalopram product alongside the brand versions. A generic has the same active ingredient and must meet the FDA's bioequivalence standard; it usually costs less. Ask your pharmacist which one your plan covers.

It works gradually, not overnight. You may notice some early changes — sleep, appetite or energy — within the first 1 to 2 weeks, but the full effect on mood or anxiety usually takes about 4 to 6 weeks (sometimes up to 8). That delay is normal and is why prescribers ask you not to judge it too soon or stop early; give it time and stay in touch about side effects, and never stop abruptly.

Alcohol: the FDA label says to avoid alcohol — see the alcohol section above for what it actually says. Other medicines: we hold source-cited interaction answers for Can you drink alcohol while taking Lexapro (escitalopram)?. This is what the FDA label and our cited sources say — it is not a complete list. Your pharmacist can check your own combination.

The most common, usually-mild side effects of Lexapro (escitalopram) are nausea, headache, trouble sleeping (insomnia) or drowsiness, dizziness, increased sweating, and sexual side effects such as lowered sex drive, delayed orgasm, or difficulty with ejaculation. Appetite and weight changes can also occur. The NHS notes that "most side effects should ease after a couple of weeks as your body gets used to the medicine, but some can last longer." If a common side effect is severe or does not go away, tell your prescriber rather than stopping on your own. This is not a complete list.

Get emergency help for a few specific red flags. Serotonin syndrome is a medical emergency — MedlinePlus lists "fever, sweating, confusion, fast or irregular heartbeat, severe muscle stiffness" (plus agitation, hallucinations, or twitching); it is more likely if Lexapro is combined with other serotonin drugs. Escitalopram can also affect heart rhythm: the NHS describes a rare but life-threatening problem causing "a fast, irregular heartbeat, light-headedness and fainting" (this QT-related risk is why the dose is capped, typically at 20 mg). Also call urgently for a serious allergic reaction (rash, hives, blisters, fever, joint pain, trouble breathing or swallowing), unusual bleeding or bruising, seizures, or hallucinations. This is not a complete list — when in doubt, seek care.

Yes. Escitalopram carries the FDA boxed warning shared by all antidepressants. As MedlinePlus states, medications such as escitalopram "may increase the risk of suicidal thoughts and actions," and "this increase was found in children, teenagers, and young adults (less than 24 years of age)." The warning is most relevant when first starting the drug or after a dose change. Patients, families, and caregivers should watch for and immediately report "new or worsening depression" or "thinking about harming or killing yourself, or planning or trying to do so." This does not mean the drug causes suicide in most people — it means close monitoring is essential early on, especially in anyone under 24.

Physical side effects like nausea, headache, and sleep changes usually appear within the first days to weeks of starting Lexapro (escitalopram) or after a dose increase. Per the NHS, "most side effects should ease after a couple of weeks as your body gets used to the medicine, but some can last longer." Sexual side effects and weight changes are the ones most likely to persist for as long as you take the drug. Note that the mood benefit is on a different clock — antidepressant effect typically builds over several weeks, so early side effects often come before you feel better. If side effects are still troubling after a few weeks, talk to your prescriber about timing, dose, or alternatives.

No — do not stop Lexapro (escitalopram) abruptly on your own. MedlinePlus warns that if you suddenly stop, "you may experience withdrawal symptoms such as mood changes, irritability, agitation, nausea, dizziness, burning, numbness, or tingling in the hands or feet, anxiety, confusion, headache, sweating, shaking." This is called antidepressant discontinuation syndrome. If you want to come off escitalopram, your prescriber will lower the dose gradually (a taper) to reduce these effects. Stopping or lowering the dose is a decision to make with your doctor, not alone — including when a side effect is bothering you.