Yes, Lexapro is a psychiatric medication. Its generic name is escitalopram, and it belongs to a class of antidepressants called selective serotonin reuptake inhibitors, or SSRIs. The FDA has approved it specifically for treating two psychiatric conditions: major depressive disorder (MDD) in adults and adolescents aged 12 to 17, and generalized anxiety disorder (GAD) in adults.
How Lexapro Works in the Brain
Lexapro works by increasing the amount of serotonin available in the brain. Serotonin is a chemical messenger that helps regulate mood, sleep, and emotional balance. Normally, after serotonin is released between brain cells, it gets reabsorbed. Lexapro blocks that reabsorption, leaving more serotonin active for longer. This is the “reuptake inhibition” part of its drug class name.
That said, the medication doesn’t work overnight. You may notice some improvement in symptoms within the first two weeks, but it typically takes four to six weeks to feel the full effects. This delay is common across all SSRIs, not just Lexapro, and it’s one reason people sometimes stop taking it too early, assuming it isn’t working.
What Lexapro Is Prescribed For
Lexapro has two FDA-approved uses. The first is major depressive disorder, a condition marked by persistent low mood, loss of interest in activities, fatigue, and difficulty concentrating that lasts at least two weeks. It’s approved for both short-term treatment of depressive episodes and longer-term maintenance to prevent relapse. The second approved use is generalized anxiety disorder in adults, which involves chronic, excessive worry that’s difficult to control and interferes with daily life.
Doctors sometimes prescribe Lexapro for other conditions not listed on the label, such as panic disorder, social anxiety, or obsessive-compulsive disorder. This is called off-label prescribing and is legal and common in psychiatry when a doctor believes the medication fits the patient’s symptoms.
Typical Dosing
For both depression and anxiety, the standard starting dose is 10 mg taken once daily. Many people stay at that dose. If symptoms don’t improve enough after at least one week, the dose can be increased to a maximum of 20 mg per day. Adolescents follow the same range. It’s a once-daily pill, usually taken in the morning or evening, and it can be taken with or without food.
Common Side Effects
Like all SSRIs, Lexapro comes with a range of possible side effects. Many of these are most noticeable in the first week or two and tend to ease as your body adjusts. The most frequently reported include nausea, headache, trouble sleeping, drowsiness, and changes in appetite (some people eat less and lose weight). Sexual side effects, including decreased desire and difficulty with arousal or orgasm, are also common and sometimes persist for the duration of treatment.
Older adults face a higher risk of a specific side effect: low sodium levels in the blood, which can cause confusion, weakness, or dizziness. Lexapro can also increase the risk of bleeding, particularly if you’re already taking blood thinners or anti-inflammatory painkillers.
The FDA’s Black Box Warning
Lexapro carries the FDA’s most serious safety label, a black box warning. It states that antidepressants increased the risk of suicidal thoughts and behaviors in children, adolescents, and young adults in short-term clinical studies. This doesn’t mean the medication causes suicide. It means that in the early weeks of treatment, some younger patients experience a worsening of mood or new suicidal thinking. Close monitoring during the first few months of treatment, and after any dose change, is standard practice.
Medications That Don’t Mix Well With Lexapro
Because Lexapro raises serotonin levels, combining it with other substances that also boost serotonin can lead to a potentially dangerous condition called serotonin syndrome. Symptoms include agitation, rapid heartbeat, high blood pressure, muscle twitching, and in severe cases, seizures.
The list of substances that raise serotonin risk is broader than most people expect. It includes other antidepressants (both prescription and older types like MAOIs), certain migraine medications called triptans, opioid painkillers like tramadol and fentanyl, the mood stabilizer lithium, and even over-the-counter cough medicines containing dextromethorphan. Herbal supplements like St. John’s wort and illicit drugs like MDMA (ecstasy) and cocaine also increase risk. If you take Lexapro, any new medication or supplement should be cross-checked for interactions.
Stopping Lexapro Safely
Lexapro should not be stopped abruptly. Doing so can trigger discontinuation symptoms: dizziness, nausea, irritability, brain zaps (brief electric shock-like sensations), trouble sleeping, increased anxiety, and unusual fatigue. These symptoms aren’t dangerous, but they can be uncomfortable and are sometimes mistaken for a relapse of the original condition.
The standard approach is a gradual taper, reducing the dose over a period of weeks. Most clinical guidelines recommend tapering over two to four weeks with stepwise dose reductions. Some people, particularly those who have been on Lexapro for a long time, may need an even slower taper. Your prescriber can adjust the schedule based on how you respond at each step down.