Morbidity in treated bipolar disorder: A one-year prospective study using daily life chart ratings

Stigma in Bipolar Affective Disorder: A Systematic Quantitative Literature Review of Indian Studies

BACKGROUND

Bipolar affective disorder (BPAD) is one of the most common severe mental illnesses that cause morbidity. Stigma can negatively influence the disease experience in patients with BPAD. Significant differences are observed in the attributes of stigma across the various sociocultural milieus. The current review was thus conducted to compile the evidence regarding the burden and correlates of various forms of stigma in BPAD in India.

METHODS

An exhaustive literature review was conducted in PubMed, MedIND, and Google Scholar to identify Indian studies conducted on stigma in BPAD. The broad themes in various forms of stigma were identified (qualitative analysis). Quantitative analysis of measures of stigma was done, calculating the effect size in BPAD and comparator groups (schizophrenia and anxiety disorders) using standardized mean difference.

RESULTS

Overall, 12 studies could be identified for qualitative analysis, and 5 were used for quantitative analysis. Overall, the current evidence points out that the stigma in BPAD is less than that in schizophrenia but more than that in anxiety disorders. Internalized stigma in BPAD is correlated with poor self-esteem, reduced community participation, and low quality of life. Caregivers of patients with BPAD also experience significant stigma.

CONCLUSIONS

The review shows that stigma in BPAD is substantial. It also draws attention to the fact that the research regarding stigma in BPAD is lagging behind. This review also provides a platform to develop an intervention in the Indian scenario, where further research should be carried out.

Anticonvulsants as mood stabilisers

Recent research has highlighted the fact that a significant number of patients with bipolar affective disorder have a poor outcome (Cole et al, 1993). The most common poor outcome is the development of rapid or ultra-rapid cycling, but mixed states, prolonged depression and severe mania are also associated with poor outcome. It is estimated that approximately one-third of patients with bipolar affective disorder do not respond fully to lithium and a significant number of patients discontinue lithium (Post, 1990) which may itself cause further problems.

Relationship of mania symptomatology to maintenance treatment response with divalproex, lithium, or placebo

Euphoric and mixed (dysphoric) manic symptoms have different response patterns to divalproex and lithium in acute mania treatment, but have not been studied in relationship to maintenance treatment outcomes. We examined the impact of initial euphoric or dysphoric manic symptomatology on maintenance outcome. Randomized maintenance treatment with divalproex, lithium, or placebo was provided for 372 bipolar I patients, who met improvement criteria during open phase treatment for an index manic episode. The current analysis grouped patients according to the index manic episode subtype (euphoric or dysphoric), and evaluated the impact on maintenance treatment outcome. The rate of early discontinuation due to intolerance during maintenance treatment was higher for initially dysphoric patients (N=249) than euphoric patients (N=123; 15.7 vs 7.3%, respectively; p=0.032). Both lithium (23.2%) and divalproex (17.1%) were associated with more premature discontinuations due to intolerance than placebo (4.8%; p=0.003 and 0.02, respectively) in the initially dysphoric patients. Among initially euphoric patients, treatment with lithium was associated with significantly more premature discontinuations due to intolerance compared to placebo (18.2 vs 0%; p=0.03), and divalproex was significantly (p=0.05) more effective than lithium, but not placebo in delaying time to a depressive episode. Initial euphoric mania appeared to predispose to better outcomes on indices of depression and overall function with divalproex maintenance than with either placebo or lithium. Dysphoric mania appeared to predispose patients to more side effects when treated with either divalproex or lithium during maintenance therapy.

Oxcarbazepine (Trileptal) in the treatment of bipolar disorders: a review of efficacy and tolerability

Oxcarbazepine, although structurally similar to carbamazepine, is metabolised very differently. As a consequence, oxcarbazepine's pharmacokinetic profile is comparatively less complex, and a more predictable, linear relationship between oxcarbazepine and blood levels is apparent. Furthermore, hepatic enzyme induction is considerably less with oxcarbazepine. Unlike carbamazepine, oxcarbazepine does not appear to induce its own metabolism, nor is it highly protein bound. These pharmacokinetic and metabolic characteristics raise the expectation that potential for drug interactions and side effects with oxycarbazepine will be less than that reported for carbamazepine. This review compares the pharmacokinetic and metabolic profiles of the two drugs and the available efficacy and safety data of carbamazepine and oxcarbazepine, in the treatment of bipolar disorder.

Utility of the daily prospective National Institute of Mental Health Life-Chart Method (NIMH-LCM-p) ratings in clinical trials of bipolar disorder

This study investigated the assets of the daily prospective National Institute of Mental Health Life-Chart Method (NIMH-LCM-p or LCM-p) for use in clinical trials in bipolar disorder. Fifty-two outpatients, who met DSM-III-R criteria for bipolar disorder, were randomly assigned in a double-blind design to an intended 1 year of treatment with lithium or carbamazepine, a crossover to the opposite drug in the second year, and then to a combination of both agents in the third year. For each patient, the LCM-p was initiated upon admission and was continued on a daily basis. Overall therapeutic effect for each phase (intended year) was assessed by using the Clinical Global Impressions-Bipolar Version (CGI-BP) scale. Kruskal-Wallis analysis of variance was used to examine the detailed course-of-illness variables derived from the LCM-p (e.g., percentage of time ill, average severity of illness, episodes per year, and mood switches per year) in relation to the global assessments of treatment response (CGI-BP). Most of the individual LCM-p-derived illness variables varied significantly (P <.05) as a function of global treatment response. Since global ratings of the degree of improvement can represent very different proportions of improvement in percentage of time ill, average severity of mania or depression, or frequency of manic and depressive episodes, the LCM-p provides the basis for a comprehensive description of both the illness course and the response to treatment. The LCM-p appears to have considerable utility in clinical trials of pharmacological and other interventions of bipolar disorder. It provides a detailed characterization of the severity, frequency, and duration of manic and depressive episodes, which facilitates the assessment of global improvement and allows for the quantification of separate components of the illness, which are or are not responsive to a given treatment.

The efficacy of lamotrigine in rapid cycling and non-rapid cycling patients with bipolar disorder

BACKGROUND

Patients with bipolar disorder (BD) who have rapid cycling features are often treatment refractory. Clear and conclusive evidence regarding effective treatments for this group is not available.

METHODS

Patients with diagnoses of refractory bipolar disorder who were currently experiencing manic, mixed, depressive, or hypomanic episodes were treated with lamotrigine as add-on therapy (60 patients) or monotherapy (15 patients). We compared the efficacy of lamotrigine in the 41 rapid cycling and 34 non-rapid cycling patients with BD.

RESULTS

Improvement from baseline to last visit was significant among both rapid cycling and non-rapid cycling patients for both depressive and manic symptomatology. For patients entering the study in a depressive episode, improvement in depressive symptomatology was equivalent in the two groups. Among patients entering the study in a manic, mixed, or hypomanic episode, those with rapid cycling improved less in manic symptomatology than did non-rapid cycling patients. Among rapid cycling patients with initial mild-to-moderate manic symptom severity, improvement was comparable to that in non-rapid cycling subjects; however, the subset of rapid cycling patients with severe initial manic symptomatology had little improvement in mania. Rapid cycling patients had earlier onset and more lifetime episodes of mania, depression, and mixed mania.

CONCLUSIONS

Lamotrigine was generally effective and well tolerated in this group of previously non-responsive, rapid cycling bipolar patients.

Lithium plus valproate as maintenance polypharmacy for patients with bipolar I disorder: a review

Standard pharmacotherapy for the maintenance treatment of patients with bipolar I disorder consists of lithium, valproate, or carbamazepine. However, many patients fail to respond to monotherapy with any of these agents, and as a result, psychiatrists often resort to polypharmacy. Findings from some open-label trials and retrospective chart reviews suggest this approach may be useful, but in the few controlled trials that have been conducted, the results have been negative. One drug combination that warrants further study as maintenance therapy is lithium plus valproate. Each is approved by the U.S. Food and Drug Administration for treatment of acute mania, and lithium has demonstrated efficacy for maintenance treatment as well. Some preliminary evidence suggests that the combination can be effective for patients who do not respond to monotherapy, and it seems to be no more dangerous than monotherapy. Concomitant administration of lithium plus valproate does not significantly alter lithium pharmacokinetics, and statistically significant changes that arise in valproate pharmacokinetics are not clinically significant. Although it is not known whether the drugs interact to augment response, many of their effects in the central nervous system do differ, and there is no indication of pharmacodynamic interactions that oppose each other. Finally, some evidence suggests that lithium and valproate may differ with regard to clinical variables that predict response to treatment.

Preliminary evidence of the reliability and validity of the prospective life-chart methodology (LCM-p)

This article describes the use of the NIMH prospective life-charting methodology (NIMH LCM-p) in the context of a formal double-blind, clinical trial and provides preliminary evidence of its reliability and validity. Subjects included in this report were 30 outpatients with bipolar I and II disorder who completed the first 2 years of a long-term maintenance study: 1 year on carbamazepine or lithium and a crossover to the other in the second year. The LCM-p follows the same types of guidelines and principles utilized in the previously described retrospective life-chart process, allowing for continuity of illness assessment prior and subsequent to study entry. In the LCM-p, daily ratings of severity of mood symptoms based on the degree of associated functional incapacity, provide a more detailed topography of manic and depressive fluctuations. Inter-rater reliability was examined by comparing the severity of daily LCM-p ratings assigned by two raters. In order to assess the validity, we correlated the LCM-p ratings with well-standardized scales, including Hamilton and Beck Depression Ratings, Young Mania Ratings and the Global Assessment Scale (GAS). The Kappa scores for inter-rater reliability demonstrated significant and satisfactory strength of agreement with no fall off over 14 days prior to the rating interview. Strong correlations were found: (1) between the LCM-p average severity for depression rating and the mean Hamilton Depression Rating (r = 0.86, p < .001), and the Beck Depression Inventory (r = 0.73, p < .001); 2) between the LCM-p average severity for mania rating and the Young Mania Rating Scale (r = 0.61, p < .001); and (3) between the LCM-p average severity and the GAS (r = -0.81, p < .001). These preliminary data suggest the reliability and validity of the NIMH-LCM-p in assessing manic and depressive episode severity. It also provides a useful continuous daily measure of affective illness-related symptom fluctuations that allows for detailed prospective assessment of frequency and pattern of illness, treatment response, and continuity with retrospective life chart assessments.

The combat of non-compliance during prophylactic lithium treatment

Non-compliance is the most frequent cause of recurrence during prophylactic lithium treatment and is associated with poor response and high levels of suicidality. Non-compliance is a complex phenomenon and may have a number of causes. When manic-depressive patients fare badly under the conditions of so-called 'naturalistic' trials, this usually indicates that such conditions are inadequate for long-term maintenance treatment. Prophylactic lithium treatment must be accompanied by measures to sustain compliance and counteract drop-out, and these measures build on three cornerstones, namely information, support and supervision.