The average dose of Lexapro (escitalopram) is 10 mg once daily, taken in the morning or evening. This is both the standard starting dose and the recommended maintenance dose for most adults treating depression or generalized anxiety. The maximum approved dose is 20 mg per day, but clinical trials have not consistently shown that 20 mg works better than 10 mg for most people.
Standard Dosing for Adults
For both depression and generalized anxiety disorder, the FDA-approved dosing follows the same pattern: 10 mg once a day to start, with 10 mg also serving as the target therapeutic dose. Most people stay at 10 mg throughout their treatment. If 10 mg isn’t providing enough relief after at least one week, the dose can be increased to 20 mg, which is the absolute ceiling.
This makes Lexapro unusually simple compared to many antidepressants. The effective dose range is narrow, just 10 to 20 mg, and the starting dose is the same as the recommended long-term dose. There’s no slow ramp-up to a therapeutic level the way some other medications require.
Why 10 mg Is Usually Enough
In a fixed-dose clinical trial, both 10 mg and 20 mg of Lexapro were effective for depression, but 20 mg failed to demonstrate a clear advantage over 10 mg. This is a key reason why prescribers often keep patients at 10 mg rather than pushing toward the maximum. For many people, a higher dose simply adds more side effect risk without a proportional improvement in symptoms.
That said, individual brain chemistry varies. Some people genuinely respond better at 20 mg, which is why the option exists. The decision to increase usually comes after several weeks at 10 mg if symptoms haven’t improved enough.
Dosing for Adolescents
For adolescents aged 12 and older with depression, the dosing mirrors adult guidelines: 10 mg once daily to start, with a maximum of 20 mg. For children 7 and older being treated for generalized anxiety disorder, the same 20 mg ceiling applies. Younger children are typically started at lower doses, and any increases happen gradually.
How Long Before It Works
You may notice changes in sleep, energy, and appetite within the first one to two weeks of starting Lexapro. These early shifts are real but aren’t the full therapeutic effect. On average, it takes four to six weeks to feel the complete benefits of the medication. This timeline matters when evaluating whether your dose is working. Deciding a dose isn’t effective after just two weeks is premature for most people.
How Long You Stay on It
Lexapro is not typically a short-term medication. Acute episodes of depression generally require several months or longer of continued treatment after symptoms improve. Clinical evaluations of patients taking 10 or 20 mg daily showed a clear benefit from staying on the medication as maintenance therapy rather than stopping once they felt better. Stopping too early significantly raises the risk of symptoms returning.
When it is time to stop, gradual tapering is standard practice. Cutting the dose abruptly can cause withdrawal-like symptoms, including dizziness, irritability, and sensory disturbances sometimes called “brain zaps.” A slow step-down over weeks helps your brain readjust.
Why Some People Start Below 10 mg
Although 10 mg is the official starting dose, some prescribers begin patients at 5 mg for the first week. This isn’t an FDA-specified recommendation, but it’s a common real-world approach for people who are sensitive to medication side effects or who are anxious about starting a new drug. The 5 mg introductory period can reduce the intensity of early side effects like nausea, headache, or increased anxiety that some people experience during the first few days. After a week or so, the dose moves up to the standard 10 mg.
Older adults and people with liver problems also commonly use lower doses because they process the medication more slowly, leading to higher drug levels in the bloodstream at any given dose.
The 10 mg vs. 20 mg Tradeoff
The practical question many people have is whether they should push for 20 mg if 10 mg feels only partly effective. The tradeoff is straightforward: 20 mg may help some individuals who didn’t fully respond at 10 mg, but it also increases the likelihood and intensity of side effects like fatigue, sexual dysfunction, and weight changes. Given that clinical data didn’t show a consistent advantage of 20 mg over 10 mg across large groups, most prescribers treat the higher dose as a second step rather than a default target.
If you’re weighing whether your current dose is right, the four-to-six-week timeline is the key benchmark. Give the medication a full trial at your current dose before assuming it needs to change.