Quetiapine Extended Release (XR) in Bipolar Patients With Comorbid Generalized Anxiety Disorder (GAD)
Condition: Bipolar Disorder; Anxiety; Anxiety Disorders; Substance Use Disorders
MeSH terms: Substance-Related Disorders; Anxiety Disorders; Bipolar Disorder
Intervention: Quetiapine XR; Placebo for quetiapine XR
Intervention description: Days 1-2 - 50 mg/day; Days 3-4 - 150mg/day; Day 5-End of Study - 300mg/day; Days 1-2 - 50 mg/day; Days 3-4 - 150mg/day; Day 5-End of Study - 300mg/day
Intervention MeSH terms: Quetiapine Fumarate
Phase: Phase 3
Study type: Interventional
Primary purpose: Treatment
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Enrollment: 120.0
Sex: All
Minimum age: 18 Years
Maximum age: 65 Years
Healthy volunteers: No
Keywords: Bipolar Disorder; Anxiety; Anxiety Disorders; Substance Use Disorders

Summary:

      The primary objective is to test the hypothesis that Quetiapine XR (Extended Release)
      monotherapy and adjunctive therapy is effective in the acute treatment of bipolar depression
      and comorbid generalized anxiety disorder in patients with bipolar disorder with or without a
      substance use disorder. The secondary aim is to generate an estimate of effect size to power
      a definitive large-scale, multi-site collaborative R01 and to configure the use of the
      primary and secondary outcome measures in the definitive large-scale study.
    

Eligibility criteria:

        Inclusion Criteria:

          -  Diagnostic and Statistical Manual-IV diagnosis of bipolar I or II disorder, and
             currently depressed as confirmed by the MINI-Plus at Screening.

          -  Diagnostic and Statistical Manual-IV diagnosis of lifetime GAD;

          -  Hamilton Depression Rating Scale -17 items total score ≥ 18;

          -  Hamilton Anxiety Rating Scale total score ≥ 18;

          -  Be male or female at least 18 year old and not older than 65.

        Exclusion Criteria:

          -  Pregnancy or breast feeding.

          -  Severe medical or neurological problems.

          -  Severe personality disorder.

          -  Currently suicidal risk judged by physician.

          -  Known history of intolerance or hypersensitivity to any of the medications involved in
             the study.

          -  Treatment with quetiapine at any dose in the 6 months prior to randomization.

          -  Known lack of response to quetiapine in a dosage of at least 50 mg for 4 weeks at any
             time, as judged by the investigator.

          -  Dependence on opiate, phencyclidine (PCP), and/or barbiturate.

          -  Acute mania as determined by a score > 12 on the Young Mania Rating Scale at baseline.

          -  Concurrent obsessive compulsive disorder.

          -  Use of any of the following cytochrome P450 3A4 inhibitors in the 14 days preceding
             enrolment including but not limited to: ketoconazole, itraconazole, fluconazole,
             erythromycin, clarithromycin, troleandomycin, indinavir, nelfinavir, ritonavir,
             fluvoxamine and saquinavir

          -  Use of any of the following cytochrome P450 inducers in the 14 days preceding
             enrollment including but not limited to: phenytoin, carbamazepine, barbiturates,
             rifampin, St. John's Wort, and glucocorticoids

          -  Administration of a depot antipsychotic injection within one dosing interval (for the
             depot) before randomisation

          -  Medical conditions that would affect absorption, distribution, metabolism, or
             excretion of study treatment

          -  Unstable or inadequately treated medical illness (e.g. diabetes, angina pectoris,
             hypertension) as judged by the investigator

          -  Involvement in the planning and conduct of the study

          -  Previous enrolment or randomisation of treatment in the present study.

          -  Participation in another drug trial within 4 weeks prior enrolment into this study or
             longer in accordance with local requirements

          -  A patient with diabetes mellitus (DM) fulfilling one of the following criteria: a.
             Unstable DM defined as enrollment glycosylated hemoglobin (HbA1c) .8.5% b. Admitted to
             hospital for treatment of DM or DM related illness within the past 12 weeks c. Not
             under physician care for DM d. Physician responsible for patient's DM care has not
             indicated that the patient's DM is controlled f. Physician responsible for patient's
             DM care has not approved the patient's participation in the study g. Has not been on
             the same dose of oral hypoglycemic drug(s) and/or diet for the 4 weeks before
             randomization. For thiazolidinediones (glitazones) this period should not be less than
             8 weeks before randomization h. Taking insulin whose daily dose on one occasion in the
             past 4 weeks has been more than 10% above or below their mean dose in the preceding 4
             weeks Note: If a patient with DM meets one of these criteria, the patient is to be
             excluded even if the treating physician believes that the patient is stable and can
             participate in the study.