Prescribers weigh several things at once, and the reasoning below is illustrative, not a rule.
If a person has difficulty swallowing tablets, or needs a form that can be measured out, a doctor may consider that sertraline is supplied as a concentrate (liquid) as well as a tablet (MedlinePlus, undated). If a person's symptoms follow a monthly pattern, a doctor may take into account that sertraline has a labeled dosing pattern for premenstrual dysphoric disorder, taken either every day of the month or on certain days (MedlinePlus, undated).
If a person is an adolescent, a doctor may look at what each product's label covers: escitalopram capsules are indicated for major depressive disorder in adults younger than 65 and in pediatric patients 12 years of age and older (U.S. Food and Drug Administration, 2025). Separately, sertraline may decrease appetite and cause weight loss in children, and parents are advised to talk to the child's doctor about concerns regarding growth or weight (MedlinePlus, undated). Either way, medications in this class may increase the risk of suicidal thoughts and actions in children, teenagers and young adults under 24, with the risk more likely in the first few months of treatment and when the dose is increased (MedlinePlus, undated) — which is why close follow-up is part of the plan.
If a person takes a monoamine oxidase inhibitor, has taken one within the past 14 days, or takes pimozide, the escitalopram capsule label treats those combinations as contraindicated (U.S. Food and Drug Administration, 2025). If a person takes NSAIDs, aspirin, other antiplatelet drugs, warfarin or other anticoagulants, the same label notes an increased bleeding risk — serotonin is involved in platelet function, so blocking its reuptake can add to the effect of medicines that already reduce clotting (U.S. Food and Drug Administration, 2025). Bring your full medicine and supplement list to the appointment rather than deciding for yourself what interacts.
Serotonin syndrome most often occurs when two or more medicines that affect serotonin levels are taken together; both escitalopram and sertraline are listed among SSRIs that can contribute (MedlinePlus Medical Encyclopedia, undated). Neither drug is exempt from that consideration.