Lexapro (escitalopram) is one of the most prescribed antidepressants in the US, used for depression and generalized anxiety disorder. It's often chosen specifically because it tends to have a cleaner side effect profile and fewer drug interactions than older SSRIs like Prozac (fluoxetine) or Paxil (paroxetine).
But "fewer interactions" doesn't mean "no interactions." Here's what you need to know.
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Check interactions now →Like all SSRIs, Lexapro must never be taken with monoamine oxidase inhibitors (MAOIs). The combination can cause serotonin syndrome — a potentially fatal condition caused by excessive serotonin activity. MAOIs include phenelzine, tranylcypromine, isocarboxazid, and selegiline. You must wait at least 14 days after stopping an MAOI before starting Lexapro, and at least 14 days after stopping Lexapro before starting an MAOI.
Lexapro prolongs the QT interval — a measure of the heart's electrical cycle. This is a known effect of escitalopram, and it becomes clinically significant when combined with other drugs that also prolong QT. Medications of concern include certain antipsychotics (haloperidol, quetiapine), some antibiotics (azithromycin, ciprofloxacin), certain antihistamines, and some antiarrhythmics. At high Lexapro doses (above 20mg), this effect is more pronounced. People with existing heart conditions or low potassium/magnesium levels are at higher risk.
Lexapro — like all SSRIs — inhibits platelet function by reducing serotonin uptake in platelets (serotonin normally helps platelets clump together). Combined with blood thinners (warfarin, apixaban, rivaroxaban) or NSAIDs (ibuprofen, naproxen, aspirin), this significantly increases bleeding risk, particularly gastrointestinal bleeding. Use acetaminophen instead of NSAIDs for pain relief while on Lexapro. If you take a blood thinner, inform your anticoagulation team that you take Lexapro.
Combining Lexapro with other drugs that increase serotonin activity raises the risk of serotonin syndrome. Drugs of concern include:
Alcohol and Lexapro are not a recommended combination. Alcohol worsens depression and anxiety, disrupts sleep, and can increase sedation when combined with escitalopram. For people in the early weeks of starting Lexapro, avoiding alcohol is strongly advised as your body adjusts to the medication.
Cimetidine (Tagamet), an older heartburn medication, can raise Lexapro blood levels by blocking its metabolism. This may intensify side effects. Omeprazole and other PPIs do not have this interaction — cimetidine is the specific concern here.
Lexapro has a relatively mild effect on cytochrome P450 liver enzymes (particularly CYP2D6 and CYP3A4) compared to fluoxetine (Prozac) and paroxetine (Paxil), which are strong inhibitors. This means Lexapro is less likely to raise or lower blood levels of other medications that are processed by those enzymes. This is one reason Lexapro is often preferred for patients on complex medication regimens.
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Try MedCheck free →It's best to avoid regular ibuprofen use with Lexapro. The combination significantly increases the risk of gastrointestinal bleeding. For occasional pain relief, acetaminophen (Tylenol) at normal doses is the recommended alternative. If you need regular anti-inflammatory treatment, discuss safer options with your doctor.
Low-dose melatonin (0.5–3mg) is generally considered relatively safe with Lexapro for most people. There's a theoretical interaction at the serotonin receptor level with higher doses, but clinical reports of problems are rare. It's worth mentioning to your prescriber, especially at higher melatonin doses.
Yes — Lexapro and Wellbutrin (bupropion) are sometimes prescribed together, as they work through different mechanisms and can complement each other. Wellbutrin doesn't significantly increase serotonin and isn't an SSRI, so serotonin syndrome risk is low. The main consideration is that Wellbutrin lowers seizure threshold — your prescriber will weigh this against the clinical benefit.
There is no significant pharmacokinetic interaction between Lexapro and hormonal contraceptives. Birth control does not reduce Lexapro's effectiveness, and Lexapro does not reduce birth control's effectiveness. The two can safely be taken together.