Lexapro vs. Wellbutrin: Differences and Who Each May Suit

Whether you typed “Lexapro vs Wellbutrin” or “Wellbutrin vs Lexapro,” you’re comparing two antidepressants built on different ideas. Lexapro (escitalopram) is an SSRI. Wellbutrin (bupropion) isn’t, and that single fact shapes most of what follows. For depression overall, neither has been shown to work clearly better than the other.

The real differences sit in the labels, the side effects and the safety cautions, set side by side below. It’s general information for a conversation with your provider, not advice to pick one.

An SSRI and an NDRI: How Each Works

Lexapro’s FDA label describes escitalopram as a highly selective serotonin reuptake inhibitor. Its effect on depression is presumed to come from increasing the activity of serotonin, one of the brain’s chemical messengers, by blocking its reuptake into nerve cells.

Bupropion is often called an NDRI, a norepinephrine-dopamine reuptake inhibitor. Wellbutrin XL’s FDA label puts it more modestly: bupropion is a relatively weak blocker of the reuptake of norepinephrine and dopamine, and it doesn’t block serotonin’s reuptake. The label also says plainly that how bupropion eases depression is unknown, which is true of antidepressants in general.

Bupropion comes in several tablet forms; the details here come mainly from the Wellbutrin XL (extended-release) label. Because one acts on serotonin and the other doesn’t, the two part ways on side effects and cautions far more than two SSRIs would.

What Each Is FDA-Approved to Treat

For adults, the current labels list:

• Lexapro (escitalopram): major depressive disorder and generalized anxiety disorder.
• Wellbutrin XL (bupropion): major depressive disorder, and preventing depressive episodes in seasonal affective disorder, depression that returns each fall and winter.
• Help to quit smoking: Wellbutrin XL’s label notes that it isn’t approved for this, but that sustained-release bupropion is, sold as Zyban, which has the same active ingredient.

Lexapro is also approved for some uses in children and teens, and Wellbutrin XL isn’t; we see adults 18 to 65.

Before either is started, both labels call for screening for bipolar disorder, because antidepressants can trigger mania or hypomania. Labels reflect what was studied for approval, and the FDA notes that providers generally may also use an approved drug for other purposes when medically appropriate, called off-label use.

How Well Each Works for Depression

The research doesn’t separate them much. In two 8-week trials with 830 adults comparing bupropion XL, escitalopram and placebo, the two medications didn’t differ in remission or response rates. There was a wrinkle, though: escitalopram beat placebo on the main depression scale in one trial and in the pooled data, while bupropion didn’t separate from placebo on that measure.

Other analyses fill in the picture. Bupropion did beat placebo in the large 2018 network analysis described below, where all 21 antidepressants studied did. A pooled analysis of 7 trials found nearly identical response and remission rates with bupropion and SSRIs (sertraline, fluoxetine or paroxetine; escitalopram wasn’t among them). And a Cochrane review, an international analysis, found no difference between escitalopram and bupropion in response or remission across 3 trials, two of them the trials above.

Larger reviews point the same way. An analysis of 234 studies, paid for by the U.S. Agency for Healthcare Research and Quality, concluded that effectiveness alone isn’t a reason to choose one newer antidepressant over another.

The largest network analysis, an international study by Cipriani and colleagues in 2018, pooled 522 trials. In its head-to-head trials, escitalopram landed among the medications that came out somewhat more effective and better tolerated, while bupropion wasn’t singled out either way. The certainty of the evidence was moderate for most comparisons involving escitalopram, but low to very low for most involving bupropion, and with all the data considered, the authors found few differences between antidepressants.

A 2023 American College of Physicians guideline recommends either cognitive behavioral therapy (CBT) or a second-generation antidepressant, a group that includes both medications, as a first treatment for moderate to severe depression, with the choice personalized to each patient. For mild depression, it suggests starting with CBT alone. We don’t offer standalone weekly therapy, but we’re happy to help you find a therapist and, with your permission, we’ll coordinate with them.

Anxiety: The Clearest Label Difference

Lexapro is FDA-approved for generalized anxiety disorder in adults. Bupropion isn’t approved for any anxiety disorder, and anxiety and agitation are among the most common side effects on its label.

Anxiety that comes with depression is a separate question, and there the gap narrows. Pooling 10 trials, one analysis found that anxiety symptoms during depression improved about as much with bupropion as with SSRIs. When depression came with high anxiety, a second analysis found a small edge for SSRIs: 65% responded, compared with 59% on bupropion.

So for generalized anxiety disorder, Lexapro is the one with the approval, while for anxiety within depression the difference looks small. Our anxiety disorders guide explains how the anxiety conditions are told apart.

Side Effects People Notice Most

Side effect rates from separate trials can’t be compared directly, both labels caution, so head-to-head studies carry more weight.

Sexual side effects. Lexapro’s label warns that SSRIs can cause sexual problems and asks prescribers to raise the subject before and during treatment. In the two 8-week trials above, which enrolled adults with normal sexual function at the start, orgasm problems at week 8 affected 30% of people on escitalopram, 15% on bupropion and 9% on placebo, and bupropion’s rate wasn’t statistically different from placebo’s.

Lower isn’t the same as none: Wellbutrin XL’s label lists impotence and abnormal ejaculation among reports after marketing. Depression itself can also affect sexual function, and rarely, sexual side effects have been reported to persist after an SSRI is stopped. Our post on sexual side effects of antidepressants looks at what can help.

Weight. In Lexapro’s controlled trials, weight change didn’t differ in any clinically important way from placebo, while bupropion’s label trials found more people losing 5 pounds or more than on placebo. In everyday care, a 2024 study of 183,118 U.S. patients compared each antidepressant with sertraline: escitalopram was linked to slightly more weight gain at 6 months (just under a pound on average) and bupropion to slightly less (about half a pound). The study was observational, the differences were small, and many people stopped their medication along the way.

Sleep and energy. Trouble sleeping is among bupropion’s most common side effects, along with dry mouth, nausea and dizziness, and its label says to take Wellbutrin XL in the morning. Escitalopram can tip either way: in Lexapro’s depression trials, insomnia (9% versus 4% on placebo), sleepiness (6% versus 2%) and tiredness (5% versus 2%) were all more common than on placebo.

Seizure Risk and Other Bupropion Cautions

Bupropion’s best-known caution is seizures. Its label says the risk rises with the dose, which should be increased gradually, and that anyone who has a seizure on it should stop and not restart. Lexapro’s label is less restrictive, asking for care in someone with a seizure history.

Wellbutrin XL’s label says not to use it in people who:

• Have a seizure disorder.
• Have, or have ever had, bulimia or anorexia nervosa, because seizures were more frequent in people with these eating disorders.
• Are suddenly stopping alcohol, benzodiazepines, barbiturates or seizure medicines.
• Are on an MAOI (an older type of antidepressant) or took one in the last 14 days, or are receiving linezolid (an antibiotic) or methylene blue given by IV. The 14-day gap also applies in reverse: no MAOI within 14 days after stopping bupropion.
• Are allergic to bupropion or anything else in the tablet.

The label also lists factors that raise seizure risk, including diabetes treated with insulin or diabetes pills, a brain tumor or infection, a severe head injury or stroke, low blood sugar or low sodium, severe liver disease, misuse of stimulants, cocaine use, heavy use of alcohol or sedatives, and other medications that lower the seizure threshold.

Bupropion can also raise blood pressure, so a reading is taken before starting and checked from time to time. It can cause psychiatric reactions such as delusions, hallucinations, paranoia, confusion or psychosis. The label says these sometimes eased when the dose was lowered or the medication was stopped, and that patients should contact a healthcare provider if they occur. It can make some urine drug screens falsely read positive for amphetamines, even after it’s stopped; a confirmatory test can tell them apart. And it shouldn’t be combined with any other medicine that contains bupropion.

Heart Rhythm and Other Escitalopram Cautions

Lexapro’s label warns about serotonin syndrome, a potentially life-threatening reaction; extra bleeding risk, which rises alongside aspirin, other anti-inflammatory pain relievers or blood thinners; and low sodium, more likely in older adults. Wellbutrin XL’s Warnings and Precautions section doesn’t include these three.

QT is part of the heartbeat’s electrical cycle, seen on an electrocardiogram (ECG). When it runs too long, the heart’s timing can be thrown off, leading to sudden, fast rhythms. Lexapro’s U.S. label doesn’t list QT among its Warnings and Precautions, but its list of reports received after marketing includes QT prolongation and a dangerous fast rhythm called torsade de pointes; reports like these can’t show how often a problem happens or prove the drug caused it. In healthy volunteers, the label reports a slight lengthening of QT that grew at a dose above any approved one, so the effect rises with the dose, and it notes that people whose genes make them clear escitalopram slowly (CYP2C19 poor metabolizers) can reach comparable levels on an approved dose. Wellbutrin XL’s label doesn’t mention QT.

A 2026 analysis of individual data from randomized trials, an international study, found that escitalopram and amitriptyline, an older antidepressant, were the two that lengthened QT compared with placebo. Escitalopram’s average effect was the larger of the two, though still modest, and results varied considerably between people. Bupropion was also studied and wasn’t one of the two. Across 139 trials, antidepressants weren’t linked to early major heart problems. A 2025 UK-led network analysis in the Lancet, covering 30 antidepressants, found no strong evidence that any of them changed QT to a clinically significant degree.

For most people the absolute risk is low, and it depends on the dose and on personal risk factors, such as other medications, a heart condition, or low potassium or magnesium. Mention any heart rhythm problem, fainting spells or family history of long QT to your provider, along with every medication you take.

Both labels also warn about angle-closure glaucoma: either medication can widen the pupils, which can set off an attack if the eye’s drainage angle is narrow and hasn’t been opened with a preventive procedure.

Interactions and Genetics

Bupropion has more reach here. Its label explains that bupropion and its breakdown products inhibit CYP2D6, an enzyme the liver uses for many common medications, so levels of some antidepressants, antipsychotics, beta-blockers such as metoprolol, and certain heart rhythm medicines can rise. Medications that need CYP2D6 to become active, such as tamoxifen, could in theory work less well.

Escitalopram’s label lists fewer interactions, though it advises caution with medications cleared by CYP2D6. Escitalopram itself is broken down mainly by CYP3A4 and CYP2C19, and because several enzymes share the work, the label says inhibiting a single one may not change its clearance much.

Genes still matter: people whose CYP2C19 enzyme naturally works slowly reach higher escitalopram levels. Pharmacogenetic testing can show how your body processes some medications; it doesn’t choose a medication for you. A 2023 guideline from CPIC, a pharmacogenetics group, covers how CYP2C19 results can help inform SSRI prescribing, escitalopram included. Your pharmacist can also check your complete list, including over-the-counter medicines and supplements.

Taking Them Together

Lexapro and Wellbutrin are sometimes prescribed together, usually when an SSRI alone hasn’t done enough. No FDA label covers the pairing; it’s a combination providers sometimes use, and the research is mixed.

Two studies funded by NIMH looked at it from different angles:

• Adding bupropion later. In the STAR*D study, which was open-label (everyone knew which medication they were taking), adults still depressed after citalopram (Celexa, a close relative of escitalopram) were randomly assigned to add bupropion or buspirone. About 3 in 10 reached remission either way, with fewer side-effect dropouts on bupropion. There was no placebo group. A 2025 U.S. review notes that later blinded, placebo-controlled trials generally haven’t confirmed STAR*D’s results, though adding bupropion later remains an option in the ACP guideline.
• Starting both at once. In the single-blind CO-MED trial, 665 outpatients were randomly assigned to escitalopram alone, escitalopram plus sustained-release bupropion, or another two-medication pairing. Remission at 12 weeks was about 39% for escitalopram alone and with bupropion, and the combinations weren’t better at 7 months either.

A smaller double-blind trial of 245 adults found the same: starting escitalopram and bupropion together wasn’t shown to bring faster or more frequent remission than single-medication treatment. So the controlled evidence leans against starting both at once. Adding bupropion later, when an SSRI alone hasn’t done enough, remains a reasonable option; the ACP guideline lists adding a second medication among the choices when a first antidepressant hasn’t worked.

Combining them calls for care, because Wellbutrin XL’s label asks for extreme caution with other medications that lower the seizure threshold, antidepressants included. Only your provider can weigh whether the combination fits your situation.

Alcohol and Both Medications

Lexapro’s label says alcohol isn’t recommended during treatment, and its Medication Guide tells patients not to drink alcohol while taking it. Wellbutrin XL’s label says drinking should be minimized or avoided, notes rare reports of mental health effects or lower alcohol tolerance in people who drank while taking it, and counts heavy drinking among seizure risk factors. None of the labels we reviewed sets a safe amount.

Sudden alcohol withdrawal is also on bupropion’s list of reasons not to take it, and its Medication Guide tells heavy drinkers to check with their provider before quitting all at once. Ask your provider or pharmacist before drinking any amount. Can you drink on antidepressants? covers each label in turn.

Timing, Stopping and Switching

In a pooled analysis of 7 trials, bupropion and SSRIs didn’t differ in how fast people responded or reached remission, including when bupropion was compared with escitalopram. NIMH puts the usual timeline for antidepressants at 4 to 8 weeks, with sleep, appetite, energy and focus often improving before mood. MedlinePlus says the full benefit can take several weeks with escitalopram and 4 weeks or longer with bupropion. Our post on feeling worse before you feel better covers those first weeks.

Both labels favor a gradual approach to stopping. Lexapro’s describes symptoms such as dizziness, irritability and electric-shock sensations after stopping, particularly abruptly, and Wellbutrin XL’s tells prescribers to taper the dose. For either, switching to or from an MAOI needs at least 14 days in both directions. Your provider maps out any switch with you, and when to consider stopping medication covers the bigger question of coming off. Please don’t stop a medication on your own; some can cause withdrawal symptoms or a return of symptoms if stopped suddenly.

How the Choice Usually Gets Made

Since neither wins outright, the choice usually rests on your own history and priorities.

These points tend to matter most:

• What’s being treated. Lexapro has the approval for generalized anxiety disorder; Wellbutrin XL has the one for preventing winter depression. Both cover major depressive disorder.
• Which side effects you most want to avoid. Bupropion has caused fewer sexual side effects in studies, and one observational study linked it to slightly less weight gain over months, while trouble sleeping and dry mouth are common with it. As a group, SSRIs caused more sleepiness than bupropion in pooled trials, though escitalopram wasn’t among them; in the Cochrane review’s direct comparisons, sleepiness didn’t differ, but tiredness was more common with escitalopram.
• Seizure risk. A seizure history, a serious head injury, current or past bulimia or anorexia, or diabetes treated with medication all matter for bupropion.
• Your heart and blood pressure, since QT questions come up with escitalopram and blood pressure with bupropion.
• Drinking and everything else you take.
• Your age, and liver or kidney problems. Lexapro’s label recommends a lower dose for most older adults, and both labels address liver and kidney problems in their dosing.
• Pregnancy or breastfeeding plans. Lexapro’s label describes breathing and adjustment problems in some newborns exposed late in pregnancy, a somewhat higher risk of bleeding after delivery, and sleepiness, restlessness or poor feeding in some breastfed infants. Wellbutrin XL’s label says first-trimester studies haven’t shown an overall rise in birth defects, though findings on one specific type of heart defect have been inconsistent and don’t allow conclusions. Both note that untreated depression carries risks too, so plan with your provider. Our post on medication and pregnancy has more.

Needing a second try is common; see why finding the right medication can take time. For other pairings, see Wellbutrin vs. Zoloft, Lexapro vs. Zoloft and Celexa vs. Lexapro. Our depression guide covers treatment more broadly.

Looking for a psychiatrist in New Jersey? Our providers are board-certified psychiatric nurse practitioners (PMHNPs), who provide psychiatric evaluation and medication management. Weighing options like Lexapro and Wellbutrin against your history is a routine part of that work.

Frequently Asked Questions

Lexapro vs Wellbutrin: which works better for depression?

Studies haven’t shown a clear winner. Head-to-head trials found similar remission rates, and large reviews found few meaningful differences, though the evidence for escitalopram is rated more certain. Side effects, cautions and your history usually decide it.

Is Wellbutrin or Lexapro better for anxiety?

Lexapro is FDA-approved for generalized anxiety disorder; bupropion isn’t approved for any anxiety disorder and can cause anxiety or agitation. For anxiety within depression, pooled studies found little difference overall, with a small edge for SSRIs when anxiety was high.

Which has fewer sexual side effects?

Bupropion. In two 8-week trials, orgasm problems affected about half as many people on bupropion as on escitalopram. Some people still have them, so raise it with your provider before starting.

Does Lexapro or Wellbutrin cause more weight gain?

In a large U.S. observational study, escitalopram was linked to slightly more gain at 6 months than sertraline and bupropion to slightly less, both under a pound on average. Individual results vary.

Can you take Lexapro and Wellbutrin together?

Sometimes, when your provider thinks it makes sense. No label approves the pairing, two controlled trials found that starting both together didn’t beat escitalopram alone, and bupropion’s label calls for extreme caution with other medications that lower the seizure threshold.

Is a psychiatric nurse practitioner the same as a psychiatrist?

No. Psychiatrists are medical doctors (MD or DO) who complete a residency in psychiatry. Psychiatric nurse practitioners are advanced practice registered nurses with graduate training in psychiatric care, and ours are board-certified (PMHNP-BC). In New Jersey, both can evaluate, diagnose and prescribe psychiatric medication. Our providers focus on careful evaluation and medication management.

A psychiatric evaluation is where that conversation starts, and medication management means regular follow-ups to see how the choice is working and adjust it if needed.

This article is for general educational purposes only. It does not constitute medical advice, does not establish a provider-patient relationship, and is not a substitute for individual evaluation, diagnosis, or treatment by a qualified clinician. If you’re in crisis or thinking about harming yourself, call or text 988 (Suicide & Crisis Lifeline), any time, day or night. In an emergency, call 911 or go to the nearest emergency room.