Potential Interactions Between Strattera (Atomoxetine) and Lexapro (Escitalopram)

Introduction to Interactions

The combination of atomoxetine and escitalopram may lead to increased escitalopram elimination, potentially reducing its efficacy, and requires careful monitoring for potential serotonergic effects 1, 2

According to the French Association for the Study of the Liver, protease inhibitors can increase the elimination of escitalopram, leading to lower plasma concentrations and potentially reduced efficacy 1

The American Academy of Child and Adolescent Psychiatry advises caution when combining two medications that may affect serotonin levels due to the risk of serotonin syndrome 2
Symptoms of serotonin syndrome include mental status changes, neuromuscular hyperactivity, and autonomic hyperactivity 2

If the combination is clinically necessary, start the second medication at a low dose and increase slowly while monitoring for adverse effects 2
Monitor closely for symptoms of serotonin syndrome, especially in the first 24-48 hours after initiating therapy or changing doses 2
Be aware that escitalopram's efficacy may be reduced when used with atomoxetine due to increased elimination 1
Consider monitoring for mental status changes, neuromuscular symptoms, and autonomic nervous system effects 2
The combination should be avoided in patients with a history of seizures, as both medications can lower the seizure threshold 2

If a patient is taking this combination and experiences reduced efficacy of escitalopram, dosage adjustments may be necessary 1, 2
Neither medication should be combined with monoamine oxidase inhibitors (MAOIs) due to significantly increased risk of serotonin syndrome 2
Be aware of potential discontinuation syndrome if escitalopram is stopped abruptly 2