Yes, a woman with Bipolar I disorder can absolutely be diagnosed with comorbid Premenstrual Dysphoric Disorder (PMDD)
These are distinct diagnostic entities that frequently co-occur, and recognizing both diagnoses is essential for optimal treatment planning. According to ICD-11 classification, PMDD is characterized by mood, somatic, or cognitive symptoms that begin several days before menses, improve within days after onset of menses, and become minimal within one week following menses 1. This temporal pattern distinguishes it from bipolar disorder.
High Comorbidity Rates
The evidence demonstrates remarkably high comorbidity between these conditions:
- 27-76% of women with bipolar disorder meet criteria for PMDD 2, with recent large-scale data showing 27.2% prevalence 3 and Chinese cohort data showing 20.6% for PMDD specifically and 57.6% for premenstrual syndrome 4
- A 2025 meta-analysis found 42-49% comorbidity rates between PMDD/PMS and mood disorders regardless of which condition was diagnosed first 5
- Conversely, 10-15% of women with PMDD are diagnosed with bipolar disorder 2
Clinical Implications of Comorbidity
When both conditions coexist, the clinical picture is more severe:
Bipolar Illness Characteristics
- Earlier age of bipolar disorder onset 4, 6
- Higher rates of rapid cycling 6
- Increased frequency of hypomanic and depressive episodes (both lifetime and past-year) 6
- Closer temporal relationship between menarche and bipolar onset 6
- More common in Bipolar II and cyclothymia than Bipolar I 3
Additional Comorbidities
Women with both conditions show significantly higher rates of:
- Panic disorder, PTSD, generalized anxiety disorder 6
- OCD and body dysmorphic disorder 4, 3
- Bulimia nervosa and substance abuse 6
- More severe perinatal mood symptoms 6
Critical Diagnostic Pitfall: Prospective Monitoring Required
The most important caveat is that PMDD diagnosis requires prospective daily symptom monitoring for at least two menstrual cycles to confirm the luteal phase timing and distinguish it from premenstrual exacerbation of bipolar disorder 2. This is the single most common diagnostic error—making a PMDD diagnosis based on retrospective recall alone can lead to misdiagnosis when symptoms actually represent worsening of bipolar disorder in the luteal phase rather than true PMDD.
How to Differentiate:
- True PMDD: Symptoms are minimal/absent in the follicular phase (week after menses)
- Premenstrual exacerbation of BD: Baseline bipolar symptoms present throughout the cycle, with luteal phase worsening
Treatment Considerations
When both diagnoses are confirmed:
- Bipolar disorder treatment remains the foundation (mood stabilizers, etc.)
- PMDD-specific interventions can be added: SSRIs (particularly continuous paroxetine) 7 or combined oral contraceptives with drospirenone/ethinyl estradiol 24/4 regimen 7
- Be aware that hormonal sensitivity may impact bipolar course 6
The bidirectional relationship suggests shared pathophysiology, with PMDD potentially serving as a risk marker for future bipolar disorder development 8, showing 2.5-fold increased risk and earlier onset when it does occur.