US adults aged ≥18 years experienced a major depressive episode* in 2020.1†
of adult participants in a national survey were estimated to have experienced MDD at some point in their lives.2‡
*A major depressive episode is a primary component of MDD, but differs from MDD in that MDD cannot be better explained by a psychotic disorder and there has never been a manic or hypomanic episode.3
†NSDUH 2020 prevalence estimates based on sample size of N = 29,950.1
‡Report of 2012-2013 National Epidemiologic Survey on Alcohol and Related Conditions III (N= 36,309).2
80% of patients with depression reported that symptoms of depression interfered with their ability to maintain a home, be socially active, and to work.4,5
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MDD=major depressive disorder;
PPD=postpartum depression
§Based on results from the Medical Expenditure Panel Survey (MEPS) 2004-2006 Household and Medical Condition files. Data were collected from a large pool of participants aged 18 to 64, including 5,464 people with depression and 53,905 people without a mood disorder.6
In a meta-analysis of 182 clinical trials involving 36,385 patients with MDD,|| nearly half (46%) of patients on antidepressants (n=23,278) failed to respond, vs 63% of patients on placebo (n=13,107).8
||Meta-analysis of 182 randomized double-blind, placebo-controlled trials (between 1980-2007) of acute antidepressant monotherapy for treatment of adults with MDD. Clinical response was defined as a ≥50% reduction in Hamilton Depression Rating Scale (HDRS) or Montgomery-Åsberg Depression Rating Scale (MADRS) scores from baseline to endpoint or a Clinical Global Impression (CGI) Scale score <3 at final visit.8
Among patients with an inadequate therapeutic response to a first-line antidepressant, dose increases, switching, and/or augmentation are commonly required.11,12
Common side effects of selective serotonin reuptake inhibitor (SSRI) antidepressants frequently persist well past the initial treatment period.13
#Based on a telephone survey of 401 patients who had received an SSRI for a new or recurrent case of depression. Telephone interviews were conducted within 75 to 105 days of starting antidepressant therapy. Patients responded yes or no to whether they had experienced any of a list of 17 common side effects of SSRIs.13
Ultimately, many patients may continue antidepressant therapy with side effects and without remission.8,13
**Based on a telephone survey of patients (N=272) on antidepressant therapy in general practitioner practices in which 23% of patients dropped out due to adverse events after a mean period of 6.5 weeks, and a 6-month study of patients newly treated for MDD (N=135) in general psychiatric clinic. In the latter study, early discontinuation was defined as within 2 months from starting the antidepressant.14,15
Learn how earlier response to antidepressants can lead to better outcomes.
Learn about research on neurochemical systems that may offer new perspectives on depression.