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The Anxious Bipolar Phenotype: Clinical Complexity and Treatment Resistance
Balwinder Singh1, Ada Man-Choi Ho1, Brandon Coombes1
1Mayo Clinic.
Research Square
|February 6, 2026
Summary
Individuals with bipolar disorder (BD) and comorbid anxiety disorders (ANX) are younger, more likely female, and experience more severe symptoms. They also show poorer treatment response to mood stabilizers and are more often prescribed antidepressants and benzodiazepines.
Area of Science:
- Psychiatry
- Clinical Psychology
- Pharmacology
Background:
- Anxiety disorders (ANX) affect a significant portion of individuals with bipolar disorder (BD), ranging from 30-60%.
- Limited research has systematically explored the clinical characteristics and treatment patterns of this comorbid population.
- Understanding these differences is crucial for effective patient management.
Purpose of the Study:
- To investigate demographic, clinical, and pharmacotherapeutic differences between individuals with BD with and without comorbid ANX.
- To identify distinct clinical profiles and treatment responses in the BD + ANX subgroup.
- To inform the development of anxiety-informed treatment algorithms for BD.
Main Methods:
- Cross-sectional analysis of 2,225 adults with BD from the Mayo Clinic Bipolar Disorder Biobank.
- Assessment of comorbid ANX, demographics, clinical features, medication use, and treatment response (Alda-A scale).
- Comparison of clinical characteristics and pharmacotherapy between BD + ANX and BD-only groups.
Main Results:
- 61% of individuals with BD had comorbid ANX.
- BD + ANX individuals were younger, more likely female, and had higher rates of rapid cycling, suicide attempts, substance use disorders, and somatic comorbidities.
- BD + ANX patients received less lithium and valproic acid but more antidepressants, benzodiazepines, and gabapentinoids; 17.3% received antidepressants without mood stabilizer coverage.
- Treatment response scores (Alda-A) were significantly lower for lithium, mood-stabilizing anticonvulsants, and second-generation antipsychotics in the BD + ANX group.
Conclusions:
- Individuals with BD + ANX represent a more severely affected subgroup with distinct clinical and demographic profiles.
- Prescribing patterns in BD + ANX favor antidepressants over mood stabilizers, with an attenuated response to mood stabilizers.
- Anxiety comorbidity in BD is a significant negative prognostic factor, necessitating anxiety-informed treatment strategies.
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