Key result
Escitalopram prolongs QTc by ~9 ms versus placebo without increasing early MACE risk.
Why the study?
The effect of specific antidepressants on QTc interval and the association of antidepressant use with early major cardiovascular adverse events in adults with major depressive disorder were uncertain.
Do specific antidepressants increase QTc interval or early MACE compared to placebo in adults with major depressive disorder?
Meta-Analysis (n=8,679)
Double-blind
Randomized
Yes
Do specific antidepressants increase QTc interval or early MACE compared to placebo in adults with major depressive disorder?
While certain antidepressants like escitalopram and amitriptyline cause small QTc prolongations, short-term antidepressant use is not associated with an increased risk of early MACE or sudden cardiac death.
Answers are grounded in this paper and cite their sources.
Captured external expert commentary on this paper, strongest first. Original sources are linked where available.
“The effect of specific antidepressants on QTc interval differed between adults with depression. No evidence associated antidepressant use with early MACE and non-suicidal sudden death. To support shared decision making and taking into account the trade-off between benefits and harms, individual modifiable and non-modifiable risk factors should be considered when choosing antidepressants.”
“Most antidepressants produce only modest changes in QTc and are unlikely to meaningfully impact risk for the average patient... Ostinelli and colleagues' work strengthens the case that most commonly prescribed antidepressants produce modest QTc changes that rarely reach a clinically meaningful threshold. Given this, as well as the known mental and physical health benefits of treating depression, clinicians can prescribe antidepressants without routine ECG monitoring for most patients who need treatment.”
“These two analyses address different estimands and should not be interpreted as mutually validating evidence. The QTc analysis estimates drug-specific, covariate-conditional changes in a selected subset of trials, whereas the MACE analysis estimates an average short-term effect across antidepressants and trials. Consequently, an overall null MACE estimate cannot establish that antidepressants associated with larger predicted QTc changes are clinically safe, nor can it exclude increased risk in susceptible subgroups.”
Select antidepressants prolong QTc modestly without raising early MACE risk; confirms short-term cardiovascular safety in major depressive disorder treatment.
Objective To compare the effect of specific antidepressants with placebo on heart rate corrected QT interval (QTc) during the first eight weeks of treatment for major depressive disorder in adults, and to investigate whether antidepressant use is associated with early major cardiovascular adverse events (MACE). Design Individual participant data (IPD) network meta-regression and aggregate pairwise meta-analysis. Data sources Individual and aggregate level data from randomised controlled trials identified through Cochrane Central Register of Controlled Trials, CINAHL, Embase, LILACS, Medline, Medline In-Process, PsycINFO, the websites of regulatory agencies, and international registers. Methods IPD were harmonised to enhance comparability and analysed using network meta-regressions to explore the interplay with baseline QTc, age, sex assigned at birth, body mass index, serum potassium level, and estimated glomerular filtration rate. The primary outcome was changes in QTc Fridericia (QTcF) associated with specific antidepressants and placebo after taking into account modifiable and non-modifiable risk factors. Aggregate data on early MACE were analysed using pairwise meta-analysis comparing antidepressants with placebo. Eligibility criteria for selecting studies Double blind randomised trials of adults (≥18 years) with major depressive disorder diagnosed according to standardised, operationalised criteria. Results Of 130 unique randomised controlled trials identified, 35 (27%) included individual level data (8679 participants) on QTc with placebo and 10 antidepressants (amitriptyline, bupropion, duloxetine, escitalopram, fluoxetine, mirtazapine, paroxetine, trazodone, venlafaxine, vortioxetine). Compared with placebo, escitalopram and amitriptyline were associated with increased QTc intervals (8.7 milliseconds (ms), 95% credibility interval (CrI) 1.6 to 15.8, and 5.3 ms, 0.8 to 9.8, respectively). When risk factors were considered, amitriptyline and escitalopram were also associated with the highest QTc prolongations (58.8% and 21.3%, respectively), whereas venlafaxine and vortioxetine were often associated with the lowest QTc intervals (24.1% and 9.7%, respectively). Important variability of effects was observed, especially for escitalopram, fluoxetine, and mirtazapine. An aggregate analysis of 139 trials (52 398 participants) did not identify an association between antidepressant use and increased rates of early MACE and non-suicidal death compared with placebo (risk difference 0.01%, 95% CrI -0.01% to 0.02%). Conclusions The effect of specific antidepressants on QTc interval differed between adults with depression. No evidence associated antidepressant use with early MACE and non-suicidal sudden death. To support shared decision making and taking into account the trade-off between benefits and harms, individual modifiable and non-modifiable risk factors should be considered when choosing antidepressants. Systematic review registration Open Science Framework https://osf.io/c8k65/ .
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Ostinelli et al. (2026) conducted a meta-analysis in Major depressive disorder (n=8,679). Antidepressants (e.g., escitalopram, amitriptyline) vs. Placebo was evaluated on Changes in QTc Fridericia (QTcF) (MD 8.7, 95% CI 1.6 to 15.8). Compared with placebo, escitalopram and amitriptyline increased QTc intervals by 8.7 ms and 5.3 ms respectively, with no increased risk of early major adverse cardiovascular events.
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