Conditions: Major Depressive Disorder
Keywords: Depression MDD
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 1056
Healthy volunteers: no

Brief summary:
The primary objective of this study is to assess whether LY2216684 12 milligrams (mg) or 18 mg flexible dose once daily is superior to placebo once daily in the adjunctive treatment of participants with major depressive disorder (MDD) who are partial responders to their selective serotonin reuptake inhibitor (SSRI) treatment.

Detailed description:
Following the Confirmation (CF) Phase, participants were randomized to adjunctive LY2216684 or adjunctive placebo if they had \<25% improvement in the Montgomery-Åsberg Depression Rating Scale (MADRS) total score over the past 3 weeks and a current MADRS total score ≥14. Participants who did not meet criteria received adjunctive placebo to preserve the blind.

Arms:
arm 1: LY2216684: flexible dose of 12 or 18 milligrams (mg), administered orally, once daily (QD) for 8 weeks, adjunctive to a selective serotonin reuptake inhibitor (SSRI)

Prior to entering the Adjunctive Treatment (AT) Phase, participants completed a 3-week Confirmation (CF) Phase where they received placebo (administered orally, QD) adjunctive to their SSRI. After the CF Phase, and after randomization criteria were met, participants were randomized to the LY2216684 treatment arm.

For the first 2 weeks of the AT Phase, participants received a starting dose of 12 mg QD. Then, based on efficacy and tolerability, the dose could be increased to 18 mg QD over the next 6 weeks. Participants who had their dose increased to 18 mg QD could have had their dose decreased to 12 mg QD. Participants who completed the AT Phase or discontinued early had the option to enter the Discontinuation (DC) Phase.

During the 1-week abrupt DC Phase, participants maintained their SSRI treatment. arm 2: Placebo: Administered orally, once daily (QD) for 8 weeks, adjunctive to a selective serotonin reuptake inhibitor (SSRI)

Prior to entering the Adjunctive Treatment (AT) Phase, participants completed a 3-week Confirmation (CF) Phase where they received placebo (administered orally, QD) adjunctive to their SSRI. After the CF Phase, and after randomization criteria were met, participants were randomized to the placebo treatment arm.

During the AT Phase, participants received placebo (administered orally, QD) adjunctive to their SSRI for 8 weeks. Participants who completed the AT Phase or discontinued early had the option to enter the Discontinuation (DC) Phase.

During the 1-week abrupt DC Phase, participants maintained their SSRI treatment.

Interventions: intervention 1: LY2216684 intervention 2: Placebo intervention 3: SSRI
Intervention descriptions: intervention 1: None intervention 2: None intervention 3: Participants should have been on their SSRI for at least 6 weeks prior and were to continue on their stable dose throughout the study

Protocol document: