Microsoft powerpoint - gsk002-307_poster 9_lginsberg_v.2.ppt
Safety and Efficacy of Lamotrigine for Adult Bipolar Disorder Patients Lawrence D. Ginsberg, MD Red Oak Psychiatry Associates, Houston, Texas Figure 2. Patient Response and Relapse on Lamotrigine Figure 4. After Lamotrigine Treatment CGI-I Scores ABSTRACT Were Mainly 1 and 2 81.3% Response Objective
Of the 587 subjects reviewed in this study, 72.2% were female, and the
To assess the effectiveness and safety of lamotrigine in the treatment of
mean age was 37.6 years (range 18-79 years). The final mean lamotrigine
± SD was 120.4±94.4 mg/day (Table 1). Responders; no relapse Unknown** Methods
54.9% of subjects were diagnosed with bipolar I disorder, 28.3% with
Chart reviews of 587 adult outpatients with DSM-IV bipolar disorder and
bipolar II disorder, and 16.9% with bipolar disorder not otherwise specified
treated with lamotrigine were conducted (mean age 37.6 ± 11.7 years;
72% female; 54.9% bipolar I, 28.3% bipolar II, 16.9% bipolar not otherwise
specified). Charts of subjects who received lamotrigine in a private practice
352 subjects (59.9%) taking lamotrigine had marked-to-moderate
Response status unknown**
improvement, with a CGI-I score of 1 observed in 20.6% of subjects and a
setting (LDG, Red Oak Psychiatry Associates, Houston, TX) between October
1998 and May 2004 were reviewed. Treatment response was assessed with
the Clinical Global Impression–Improvement (CGI-I) scale (1 = very marked
479 subjects (81.6%) responded to lamotrigine.
improvement, 2 = moderate improvement). Relapse was defined as a mood
change that occurs 4 weeks after initiation of medication or the return of
Of the responders, 52% did not relapse, and 29.3% relapsed. The mean
time to relapse was 207.0±308.9 days (range 3-1582 days) (Figure 2).
Within each bipolar disorder type, almost al of patients’ CGI-S scores were
Adult population N = 587 Results
≥ 3 at treatment initiation (Figure 3). The majority of subjects with each
Three hundred fifty-seven subjects (60.8%) taking lamotrigine had marked to
Mean Days to Relapse: 207.0
bipolar subtype had CGI-I scores of 1 or 2 at titration completion (Figure 4).
moderate improvement (CGI-I scores: 1, 21.1%; 2, 39.7%). Two hundred
Lamotrigine response is defined as achieving a CGI-I ≤3. Relapse is defined by a change in CGI-I to ≥4 after an
nineteen subjects (37.3%) relapsed during lamotrigine treatment (mean time
BD = bipolar disorder; CGI-I = Clinical Global Impression of Improvement; NOS = not otherwise specified.
The most frequently reported treatment-emergent adverse events were
observed lamotrigine response, or return of episode.
**Patient discontinued medication prior to fol ow-up.
to relapse = 207 days). The final mean lamotrigine dose was 120.4±94.3 mg/d.
non-serious rash (12.8%) and headache (2.9%) (Table 2).
**Response unknown includes: lost to fol ow-up, patient discontinued medication prior to assessment.
Rash (12.8%) and headache (2.9%) were the most frequently reported side effects. Conclusion Lamotrigine appears effective in the treatment of bipolar disorder and was Table 1. Study Population Table 2. Treatment-Emergent Adverse Events on Lamotrigine Patients CONCLUSIONS Gender (% female)
This large, retrospective study demonstrates that lamotrigine appears
INTRODUCTION Mean age (y ± SD) 37.6±11.7
effective in the treatment of bipolar disorder in adults. Age range (y)
Lamotrigine was effective across bipolar disorder subtypes.
Lamotrigine is indicated for the maintenance treatment of bipolar I disorder
to delay the time to occurrence of mood episodes in patients who received
Mean dosages of lamotrigine were similar to those seen in previous trials.
standard therapy to treat an acute mood episode.1
*Mean lamotrigine dose ± SD (mg/d).
Lamotrigine was wel tolerated, with a low incidence of side effects and no
In large, controlled, double-blind trials, lamotrigine has demonstrated
antidepressant efficacy2 and has been shown to prolong the time to relapse
Based on these data, placebo-controlled studies are warranted.
to a depressive episode3-5 in patients with bipolar I disorder.
In patients with bipolar II disorder, lamotrigine has been shown to reduce
the risk of relapse over 6 months of monotherapy6 and improve depressive symptoms.7
The objective of this study was to assess the effectiveness and safety of
Figure 1. Distribution of Bipolar Subtypes Figure 3. Across BD Subtypes, CGI-S Scores Were
lamotrigine in the treatment of bipolar disorder. Mainly 4-6 REFERENCES Bipolar NOS (n=99)
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This is a retrospective chart review of 587 adult outpatients with DSM-IV
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Treatment response was assessed with the CGI-I scale (1 = marked
improvement, 2 = moderate improvement). Subjects were considered to
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Bipolar II (n=166)
were considered to have relapsed if they experienced a mood change
BD = bipolar disorder; CGI-S = Clinical Global Impression of Severity; NOS = not otherwise specified.
4 weeks after initiation of medication or a return of symptoms from the original episode. Funding provided by GlaxoSmithKline
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