Effexor XR (venlafaxine) and Lexapro (escitalopram) are both antidepressants, but they are not the same kind. Effexor XR is an SNRI, which acts on serotonin and norepinephrine. Lexapro is an SSRI, which acts mainly on serotonin. In the largest head-to-head comparison of antidepressants published so far, both drugs landed in the group that worked better than the rest, but escitalopram was easier for people to stay on, and venlafaxine was in the group with the highest dropout rates. Effexor XR also raises blood pressure in a dose-related way, so it needs a blood pressure check. Lexapro does not carry that warning.
That is the short version. The longer version matters because these two drugs are prescribed for overlapping but not identical problems, and the differences show up in things you will actually feel: nausea, sleep, sweating, sexual side effects, and how hard it is to stop.
This article is general information drawn from FDA prescribing information and published research. It is not medical advice, and it cannot tell you which drug is right for you. Never start, stop, or switch an antidepressant on your own.
Effexor vs Lexapro at a glance
| Effexor XR (venlafaxine) | Lexapro (escitalopram) | |
|---|---|---|
| Drug class | SNRI (serotonin and norepinephrine reuptake inhibitor) | SSRI (selective serotonin reuptake inhibitor) |
| FDA-approved for | Major depression, generalized anxiety, social anxiety, panic disorder | Major depression (adults and ages 12 to 17), generalized anxiety (adults) |
| Forms | Extended-release capsules: 37.5, 75, and 150 mg | Tablets: 5, 10, and 20 mg |
| Typical schedule | Once daily with food, capsule swallowed whole | Once daily |
| Highest dose used | 225 mg per day | 20 mg per day (10 mg recommended for older adults) |
| Blood pressure warning | Yes: dose-related increases, sustained hypertension reported | Not a labeled warning |
| Children | Not approved under 18 | Approved for depression from age 12 |
| Generic available | Yes | Yes |
What each drug is
Effexor XR (venlafaxine)
Effexor XR is the extended-release form of venlafaxine, made by Wyeth (a Pfizer company). It is approved for four conditions in adults: major depressive disorder, generalized anxiety disorder, social anxiety disorder, and panic disorder. The “XR” matters. The older immediate-release version had to be taken two or three times a day; the extended-release capsule is taken once, with food, and swallowed whole. The label says not to crush, chew, divide, or dissolve it.
Lexapro (escitalopram)
Lexapro is a tablet form of escitalopram, an SSRI. It is approved for major depressive disorder in adults and in adolescents 12 to 17, and for generalized anxiety disorder in adults. It is not approved for children under 12. Escitalopram is closely related to citalopram (Celexa). It is essentially the active half of that older drug, which is part of why the two are often discussed together.
How they work
Both drugs raise the amount of certain chemical messengers available between nerve cells by slowing their reabsorption. The difference is which messengers.
Lexapro is selective. It targets serotonin and has comparatively little effect on other messengers. That selectivity is the “S” in SSRI.
Effexor XR targets serotonin and norepinephrine. Venlafaxine’s pharmacology is dose-dependent: at lower doses it acts mostly on serotonin, and the norepinephrine effect becomes more important as the dose goes up. That is a large part of why its side-effect profile shifts with dose, and why the blood pressure warning is tied to dose.
Neither drug works immediately. Most people need several weeks before they can judge the benefit, and side effects often show up first. That gap is one of the main reasons people stop early, so it is worth planning for the first month with your prescriber rather than reacting to it alone.
Which one works better?
Neither, clearly. But here is what the evidence does say.
The strongest comparison is a 2018 network meta-analysis in The Lancet by Cipriani and colleagues, covering 21 antidepressants. Its primary analysis alone drew on 474 studies and almost 107,000 people with major depression. Its main findings, as they apply here:
- Every antidepressant tested worked better than placebo.
- The differences between individual antidepressants were much smaller than the difference between any of them and placebo.
- In head-to-head studies, both escitalopram and venlafaxine were among the drugs that were more effective than the others.
- On acceptability, measured by how many people stopped treatment for any reason, escitalopram was among the more tolerable drugs. Venlafaxine was among the drugs with the highest dropout rates.
Read that last point carefully. It does not mean venlafaxine is a bad drug. It means that when large groups of people were followed, more of them left venlafaxine treatment than left escitalopram treatment, for any reason. Side effects are the most likely driver, but the analysis measured stopping, not the reasons.
It also does not mean the average result predicts your result. The credible intervals around most of these comparisons were wide. Two people with the same diagnosis can respond very differently to the same drug, and no test yet tells a doctor in advance which one will work. That is why the first drug chosen is sometimes not the last.
What each one is approved to treat
The approved-use difference is the most practical way to separate them.
| Condition | Effexor XR | Lexapro |
|---|---|---|
| Major depressive disorder | Yes (adults) | Yes (adults and ages 12 to 17) |
| Generalized anxiety disorder | Yes (adults) | Yes (adults) |
| Social anxiety disorder | Yes (adults) | No |
| Panic disorder | Yes (adults) | No |
Doctors do prescribe drugs for uses beyond their FDA labels, and SSRIs including escitalopram are often used for other anxiety conditions. But if the specific problem is social anxiety disorder or panic disorder, only Effexor XR carries those approvals of the two. If the person is between 12 and 17 with depression, only Lexapro is approved. Effexor XR is not approved for anyone under 18. In the pediatric trials the label describes, the data were not sufficient to support use, and blood pressure and cholesterol increases in children were considered clinically relevant.
Dosing
Your prescriber sets the dose. What follows is what the labels say, so you can follow the conversation, not a guide to picking your own.
Effexor XR
| Condition | Starting dose | Target dose | Maximum |
|---|---|---|---|
| Major depression | 37.5 to 75 mg a day | 75 mg | 225 mg |
| Generalized anxiety | 37.5 to 75 mg a day | 75 mg | 225 mg |
| Social anxiety | 75 mg a day | 75 mg | 75 mg |
| Panic disorder | 37.5 mg a day | 75 mg | 225 mg |
It is taken once a day with food. Patients switched from immediate-release venlafaxine are moved to the nearest equivalent daily dose, with individual adjustments as needed.
Lexapro
Lexapro comes in 5, 10, and 20 mg tablets. The two fixed doses tested in the main depression trials were 10 mg and 20 mg a day. For older adults the label recommends 10 mg. No dose change is needed for adolescents on the basis of age alone.
One number is worth knowing. In the label’s fixed-dose trials, 20 mg a day led to about 10% of people stopping because of side effects, compared with 4% on 10 mg and 3% on placebo. Higher is not always better.
Please don’t try to convert a dose from one of these drugs to the other. They are different drugs with different dosing logic, and switching involves timing decisions that belong to your prescriber.
Side effects compared
Effexor XR
In the label’s pooled placebo-controlled trials across all four conditions, the most common side effects (at least 5% of people and at least twice the placebo rate) were:
- Nausea: 30.0%
- Sleepiness: 15.3%
- Dry mouth: 14.8%
- Sweating: 11.4%
- Abnormal ejaculation: 9.9%
- Loss of appetite: 9.8%
- Constipation: 9.3%
- Impotence: 5.3%
- Decreased libido: 5.1%
About 12% of people taking Effexor XR stopped because of a side effect, compared with 4% on placebo. Nausea was the top reason (4.3%), followed by dizziness (2.2%), insomnia (2.1%), weakness (1.7%), and headache (1.5%).
Lexapro
For depression, the label lists insomnia, ejaculation disorder (mainly delayed ejaculation), nausea, increased sweating, fatigue, and sleepiness as the most commonly observed side effects. For anxiety, the list is nausea, ejaculation disorder, insomnia, fatigue, decreased libido, and difficulty reaching orgasm.
The dose relationship is easy to see in the fixed-dose trials:
| Side effect | Placebo | 10 mg | 20 mg |
|---|---|---|---|
| Insomnia | 4% | 7% | 14% |
| Diarrhea | 5% | 6% | 14% |
| Dry mouth | 3% | 4% | 9% |
| Sleepiness | 1% | 4% | 9% |
| Dizziness | 2% | 4% | 7% |
| Increased sweating | under 1% | 3% | 8% |
| Constipation | 1% | 3% | 6% |
| Fatigue | 2% | 2% | 6% |
| Indigestion | 1% | 2% | 6% |
Overall, 6% of adults with depression taking Lexapro stopped because of a side effect, versus 2% on placebo. In generalized anxiety trials it was 8% versus 4%.
A caution about comparing these two lists: they come from different trials, in different populations, with different designs. They tell you what to expect from each drug. They are not a scoreboard. Still, the pattern is consistent with the meta-analysis: nausea is a bigger issue with Effexor XR, and both drugs cause sexual side effects.
Sexual side effects
Both labels list them, and both are underreported because people are embarrassed to raise them. Delayed ejaculation, reduced libido, and difficulty reaching orgasm appear for each drug. If this happens, tell your prescriber. Changing the dose, the timing, or the drug are all options, and stopping on your own is the one option to avoid.
The blood pressure difference
This is the clearest safety difference between the two.
Effexor XR’s label includes a specific warning for elevated blood pressure. In controlled trials there were dose-related increases in both systolic and diastolic pressure, and some patients developed sustained hypertension, defined in the trials as a diastolic reading of at least 90 mm Hg and at least 10 mm Hg above baseline on three consecutive visits. The rates varied by condition and dose. In the depression trials, which included doses of 75 to 375 mg a day, it was 19 of 705 patients (about 3%). In generalized anxiety it was 5 of 1,011 (about 0.5%).
The label tells prescribers to check blood pressure before starting and regularly during treatment, and to control existing hypertension first. If you already have high blood pressure, or a heart condition, say so before the first prescription. Home readings are useful information to bring to appointments.
Lexapro’s label does not carry the same dedicated blood pressure warning. That does not make it appropriate for everyone, but it is one reason a prescriber may lean toward it for someone with hypertension.
Stopping either drug
Neither drug should be stopped suddenly. Both labels call for a gradual reduction.
Symptoms after abrupt stopping or a rapid dose drop are called discontinuation syndrome. The Effexor XR label lists dizziness, irritability and agitation, anxiety, sweating, nausea, trouble sleeping, tiredness, confusion, ringing in the ears, and “electric shock” sensations, and notes that seizures have been reported. In the label’s trials, tapering was done by lowering the dose 75 mg at weekly intervals, and it says some people need longer. The Lexapro label describes the same kind of reaction for SSRIs and SNRIs generally: dysphoric mood, irritability, agitation, and dizziness among others. Its guidance is that if symptoms are intolerable, going back to the previous dose and then tapering more slowly may be considered.
Venlafaxine is generally considered one of the antidepressants more likely to cause noticeable discontinuation symptoms, because it clears the body quickly. That is one reason missed doses feel worse on it. If you know you sometimes forget doses, mention that up front.
Safety warnings both drugs share
- Suicidal thoughts in young people. Both carry the FDA’s boxed warning: antidepressants increased suicidal thinking and behavior in children, adolescents, and young adults in short-term trials. Anyone in this age group starting one should be watched closely, especially in the first weeks and after dose changes.
- Serotonin syndrome. A rare, potentially life-threatening reaction to too much serotonergic activity. Signs include agitation, hallucinations, fast heartbeat, fever, sweating, muscle rigidity, tremor, and diarrhea. Get emergency care if they appear.
- MAOIs. Taking either drug with a monoamine oxidase inhibitor, or within 14 days of stopping one, is contraindicated. Linezolid and intravenous methylene blue count here too.
- Low sodium (hyponatremia). Reported with both, more often in older adults. Symptoms include headache, trouble concentrating, confusion, weakness, and unsteadiness.
- Bleeding. Both can increase bleeding risk, particularly with NSAIDs, aspirin, or blood thinners.
- Mania. Both labels advise screening for bipolar disorder before starting, since an antidepressant alone can trigger mania in someone with undiagnosed bipolar disorder.
- Seizures. Use with caution in anyone with a seizure disorder.
Drugs that raise the risk
The Effexor XR label lists other serotonergic drugs that increase serotonin syndrome risk: triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, amphetamines, and St. John’s wort. The Lexapro label flags the same class of interaction, including triptans. If you take any of these, or an over-the-counter supplement, tell the prescriber and pharmacist before combining anything.
Alcohol is a separate question. For how it interacts with escitalopram, see our guide to Lexapro and alcohol.
Pregnancy and breastfeeding
This is a decision to make with a doctor before pregnancy when possible, not after. Untreated depression and anxiety in pregnancy carry their own risks, and stopping an antidepressant abruptly can bring on discontinuation symptoms and relapse. Both drugs pass into breast milk to some degree. There is no universal answer, so ask your doctor and, if it helps, a perinatal psychiatrist.
Who might a doctor lean toward each drug for?
Doctors weigh many things, and this list simplifies them. It shows the reasoning, not a recommendation.
Factors that may point toward Lexapro:
- Depression or generalized anxiety, with no need for a panic or social anxiety indication
- High blood pressure or heart concerns
- A patient aged 12 to 17 with depression
- A strong wish for the option most people find easiest to tolerate
- An older adult, where a lower dose (10 mg) is the labeled recommendation
Factors that may point toward Effexor XR:
- Social anxiety disorder or panic disorder, which Lexapro is not labeled for
- A previous SSRI that did not work well enough
- A patient with normal blood pressure who can be monitored
- Someone who wants a once-daily capsule and can reliably take it with food
Neither list settles anything on its own. What decides the choice is your history: what you have tried before, what your family responded to, other medicines you take, other conditions you have, and what side effects you can live with.
Related comparisons
If you are weighing more than these two, we cover others in the same family: Paxil vs Lexapro, Lexapro vs Zoloft, Trintellix vs Lexapro, and Cymbalta vs Lexapro. Cymbalta, like Effexor, is an SNRI.
You can also use our free PHQ-9 depression screening tool or GAD-7 anxiety screening tool to organize what you’re experiencing before an appointment. They are screening questionnaires, not diagnoses.
If you are thinking about harming yourself, call or text 988 (the Suicide and Crisis Lifeline in the United States) or your local emergency number right now.
Frequently asked questions
Is Effexor stronger than Lexapro?
Not in any way that predicts your result. In the 2018 Lancet analysis, both were among the more effective antidepressants, and the differences between active drugs were much smaller than the difference between any of them and placebo. Effexor XR does have a wider approved range of uses and a higher maximum dose, but that is not the same thing as working better for you.
Which has fewer side effects, Effexor or Lexapro?
Escitalopram was among the better-tolerated antidepressants in the large meta-analysis, and venlafaxine was among the ones with the highest dropout rates. In the drug labels, nausea is much more common with Effexor XR, and Effexor XR also carries a blood pressure warning. Both cause sexual side effects.
Is Effexor an SSRI?
No. Effexor XR (venlafaxine) is an SNRI, so it acts on norepinephrine as well as serotonin. Lexapro (escitalopram) is the SSRI.
Can you take Effexor and Lexapro together?
They are not routinely combined. Both raise serotonin activity, so taking them together increases the risk of serotonin syndrome. A specialist may occasionally combine antidepressants with close monitoring, but you should never add one to the other on your own.
How long do Effexor and Lexapro take to work?
Many people notice improvement after several weeks, not days, and side effects often appear first. If you have seen no benefit after the period your prescriber suggested, ask about adjusting the dose or trying another drug rather than stopping.
Which is better for anxiety?
Both are approved for generalized anxiety disorder. Effexor XR is also approved for social anxiety disorder and panic disorder, which Lexapro is not. Which is better for a given person depends on the type of anxiety and their history.
Can I stop Effexor or Lexapro when I feel better?
Not abruptly. Feeling better usually means the drug is working, and doctors commonly continue treatment for a period after symptoms improve. When it is time to stop, both labels call for a gradual dose reduction.
Do Effexor and Lexapro cause weight gain?
Weight changes can happen with antidepressants, and the effect varies by person. Effexor XR’s label lists loss of appetite as a common effect (9.8%), so it is not a straightforward weight-gain drug. If your weight changes and concerns you, tell your prescriber.
Related Reading
- Lexapro vs Zoloft: Comparing Two Common SSRIs
- Paxil vs Lexapro: Comparing Two SSRIs
- Trintellix vs Lexapro: Comparing Antidepressants
References
- DailyMed. EFFEXOR XR (venlafaxine) extended-release capsules, full prescribing information (revised 8/2022).
- DailyMed. LEXAPRO (escitalopram) tablets, full prescribing information.
- Cipriani A, et al. Comparative efficacy and acceptability of 21 antidepressant drugs for the acute treatment of adults with major depressive disorder: a systematic review and network meta-analysis. The Lancet, 2018.
- Cipriani A, et al. Comparative efficacy and acceptability of 12 new-generation antidepressants: a multiple-treatments meta-analysis. The Lancet, 2009.60046-5/abstract)