Does Risperidone Consta Reduce Relapse and Rehospitalization in Bipolar Disorder?

Phase 4

Completed

Conditions: Bipolar Disorder

Interventions: Drug: Treatment as usual
Drug: Risperdal (risperidone) Consta

Registration Number: NCT00571688

Lead Sponsor: Vanderbilt University

Brief Summary: This study will evaluate the relative effectiveness of risperidone Consta injections occurring every 2 weeks in contrast to treatment as usual in preventing symptomatic relapse and rates of rehospitalization or admission into respite care for bipolar patients.

Hypothesis: Risperdal Consta injections every 2 weeks will reduce the number of symptomatic relapses into mania, hypomania, mixed state, or depression, as shown by key indicators that include symptomatic relapse, rehospitalizations, emergency or urgent care visits, respite care, and intensive outpatient treatment as compared to treatment as usual.

Detailed Description: Bipolar disorder arguably represents the most difficult to treat of all psychiatric disorders. In fact, long-term stabilization is more the exception than the rule, and the majority of patients experience frequent relapses of illness. Studies have shown that both bipolar I and II patients spend about half of their weeks in a significant symptomatic state. Relapses and persistent illness result in substantial morbidity, mortality, and disability.

Symptomatic recurrences happen as a result of breakthrough symptoms during active treatment and intermittent non-adherence. Therefore, enhanced control of symptoms, coupled with ensured adherence, is very likely to improve the long-term outcome of this difficult-to-treat condition.

Risperidone has been shown to be effective in controlling symptoms of acute mania or mixed state in two registration monotherapy and one combination treatment study with lithium or valproate, as well as several smaller trials. However, longer-term treatment studies are relatively lacking. As well, although Risperdal Consta(TM) has been shown to be of benefit in prevention of relapse in patients with schizophrenia, relatively little longer-term data in bipolar disorder is available. Nonetheless, both risperidone and Risperdal Consta (TM) are likely to be highly efficacious for the maintenance prevention of relapse in bipolar disorder. Moreover, Risperdal Consta(TM) helps to ensure longer-term treatment effectiveness, both by better adherence and improved control of symptoms. The present study is intended to determine whether Risperdal Consta(TM) injections, added to ongoing pharmacotherapy, will improve outcome relative to treatment as usual.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 50

Inclusion Criteria

Be physically healthy
18-60 years of age
Have a DSM-IV diagnosis of bipolar disorder in any phase, but without current psychotic features; with a history of symptomatic relapse on four or more occasions over the last year prior to the initiation of study for the treatment of bipolar disorder (type I or II, manic, hypomanic, mixed, or depressive type), with at least 1 in the previous 6 months.
Have a screening Hamilton Rating Scale for Depression-17 item (HAM-D17) score of > 8 or a Young Mania Rating Scale (YMRS) > 8.

Exclusion Criteria

Have any medical condition that would preclude treatment with Risperdal Consta(TM)
Have type 2 diabetes
Have hyperlipidemia (baseline total cholesterol >280)
Have any clinically significant unstable medical condition
Have currently active psychotic symptoms (hallucinations or delusions) or carry a diagnosis of another psychotic disorder (schizophrenia, schizoaffective disorder, delusional disorder)
Have a documentable history of non-response to Risperidal Consta (TM)
Have a score of 4 on the suicide item (item 3) of the HAM-D scale and/or a determination by the investigator of significant suicide risk
Require hospitalization between the screening and baseline visits, or require hospitalization immediately following baseline
Have a medical contraindication or hypersensitivity to risperidone or Risperdal Consta (TM)

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Treatment As Usual	Treatment as usual	Clinician and patient decide upon treatment, as in a non-research clinical setting. The only treatment exclusion is any form of risperidone.
Risperdal Consta	Risperdal (risperidone) Consta	Risperdal Consta injection in conjunction with existing treatment

Primary Outcome Measures

Name	Time	Method
Number of Relapse-related Events Normalized to Unit Time	12 months	The outcome was total number of events divided by number of months (normalized to unit time). This was be calculated by dividing the number of relapse related events by the number of months of participation. Relapse related events included: (1) YMRS score \> 14 or MADRS \> 15; (2) 20% or greater increase in the YMRS or MADRS scores from the previous study visit; (3) urgent care visit (psychiatric hospitalization; emergency department visit; referral for respite care, partial hospitalization, or intensive outpatient treatment) due to worsening mood symptoms; (4) a Clinical Global Impression Severity of Illness score \>3; (5) syndromal relapse (Diagnostic and Statistical Manual of Mental Disorders, 4th Editionfor manic, hypomanic, major depressive, or mixed episode met); (6) withdrawal from the study due to inefficacy; and (7) necessary clinical medication adjustments (NCAs).

Secondary Outcome Measures