Abstract:
BACKGROUND:Ketamine is known to rapidly reduce depressive symptoms and suicidal ideation (SI) in patients with major depressive disorder (MDD), but evidence is limited for its acceptability and effectiveness in "real-world" settings. This case series examines serial ketamine infusions in reducing SI and depression scores in adults with MDD admitted to a tertiary care hospital. METHODS:Five inpatients with MDD and SI admitted to hospital in Toronto, Canada received six infusions of 0.5 mg/kg intravenous (IV) ketamine (n = 5) over approximately 12 days, in addition to treatment-as-usual. Suicide and depression rating scores (Scale for Suicidal Ideation, SSI; Montgomery-Åsberg Depression Rating Scale, MADRS) were obtained at baseline, on treatment days, on days 14 and 42 (primary endpoint). RESULTS:All patients experienced benefit with ketamine. SSI scores diminished by 84% from 14.0 ± 4.5 at baseline to 2.2 ± 2.5 at study endpoint. MADRS scores diminished by 47% from 42.2 ± 5.3 at baseline to 22.4 ± 8.0. Two patients withdrew from the study, one to initiate electroconvulsive therapy and one due to an adverse event (dissociative effects) during the ketamine infusion. LIMITATIONS:The major limitation of this study is the small sample size. DISCUSSION:These preliminary pilot data are promising with a greater than two-fold reduction in SI following ketamine infusions. They demonstrate that six serial ketamine infusions may be safe and feasible. These findings support the need for large scale randomized controlled trials to confirm the efficacy of serial ketamine for treatment of SI in "real-world" settings.
journal_name
J Affect Disordjournal_title
Journal of affective disordersauthors
Sinyor M,Williams M,Belo S,Orser B,Vincent M,Mah L,Zarate C Jr,Castel S,Levitt AJ,Schaffer Adoi
10.1016/j.jad.2018.07.073subject
Has Abstractpub_date
2018-12-01 00:00:00pages
103-109eissn
0165-0327issn
1573-2517pii
S0165-0327(18)30740-7journal_volume
241pub_type
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