When a Psychiatric Diagnosis Is Actually Perimenopause

Perimenopause, the hormonal transition preceding menopause, typically begins in the late 30s to mid-40s and lasts an average of seven years. Its neurobiological effects, including disruptions to serotonin synthesis, dopamine signaling, γ-aminobutyric acid receptor activity, and hypothalamic-pituitary-adrenal axis reactivity, produce a symptom profile nearly identical to primary psychiatric disorders. Women presenting with new or worsening anxiety, depression, insomnia, or cognitive changes during midlife are routinely diagnosed with psychiatric conditions before a hormonal etiology is considered, a pattern with measurable consequences for patients. Perimenopause does not require abnormal laboratory values or menstrual irregularity for a diagnosis to be made. Nurses across various settings encounter perimenopausal women daily. Nurses in any role can recognize the pattern and advocate for hormonal evaluation. Advanced practice RNs, including psychiatric NPs, can integrate perimenopause into the psychiatric intake, conduct structured hormonal assessments, and initiate or coordinate evidence-based treatment. This article aims to equip nurses with the tools to recognize perimenopause, challenge five pervasive clinical misconceptions, conduct a hormonally informed assessment, and support appropriate management in any practice setting.