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High H1-affinity antidepressants and risk of metabolic syndrome in bipolar disorder.
Psychopharmacology 2016 January
RATIONALE: Metabolic syndrome (MetS) is common in patients with bipolar disorder, with a relative risk of 1.6-2 compared to the general population. The increased risk is believed to be due to unhealthy lifestyles and use of medications. Although antipsychotics and mood stabilizers have been associated with weight gain and MetS, the impact of antidepressants has not been comprehensively evaluated.
OBJECTIVE: The objective of the study is to assess the risk of MetS in patients exposed to different types of antidepressants.
METHODS: In this cross-sectional study, 294 patients with bipolar disorder were consecutively recruited. MetS was diagnosed according to NCEP ATP-III modified criteria. Antidepressants used by the patients were classified according to the usual nomenclature (SSRI, TCA, SNRI, and other antidepressants) and a pharmacodynamic classification taking into account histamine 1-receptor (H1-R) affinity.
RESULTS: Use of antidepressants in general was not associated with MetS (prevalence ratio [PR], 1.08; 95% confidence interval, 0.73 to 1.62; p = 0.70). However, subjects using H1-R high-affinity antidepressants (N = 15) showed a substantial increase in the prevalence of MetS (PR, 2.17; 95 % confidence interval, 1.24 to 3.80; p = 0.007). When we included the inhibition constant (Ki) as a continuous covariate in the models, we found an inverse association between Ki and prevalence of MetS (p = 0.004).
CONCLUSION: We observed for the first time in a clinical setting that a pharmacodynamic-based classification of antidepressants could be more useful than the traditional one to predict the risk of MetS in patients with bipolar disorder. Clinical consequences may be relevant. However larger studies are warranted to generalize these results.
OBJECTIVE: The objective of the study is to assess the risk of MetS in patients exposed to different types of antidepressants.
METHODS: In this cross-sectional study, 294 patients with bipolar disorder were consecutively recruited. MetS was diagnosed according to NCEP ATP-III modified criteria. Antidepressants used by the patients were classified according to the usual nomenclature (SSRI, TCA, SNRI, and other antidepressants) and a pharmacodynamic classification taking into account histamine 1-receptor (H1-R) affinity.
RESULTS: Use of antidepressants in general was not associated with MetS (prevalence ratio [PR], 1.08; 95% confidence interval, 0.73 to 1.62; p = 0.70). However, subjects using H1-R high-affinity antidepressants (N = 15) showed a substantial increase in the prevalence of MetS (PR, 2.17; 95 % confidence interval, 1.24 to 3.80; p = 0.007). When we included the inhibition constant (Ki) as a continuous covariate in the models, we found an inverse association between Ki and prevalence of MetS (p = 0.004).
CONCLUSION: We observed for the first time in a clinical setting that a pharmacodynamic-based classification of antidepressants could be more useful than the traditional one to predict the risk of MetS in patients with bipolar disorder. Clinical consequences may be relevant. However larger studies are warranted to generalize these results.
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