Bipolar Disorder – Comprehensive Study Notes

Overview

  • Bipolar disorder (a.k.a. manic–depressive disorder) is a chronic, lifelong mood disorder characterised by extreme shifts in mood, energy and activity.
  • Hallmark: distinct episodes of depression and mania (or hypomania) with cycling between the two poles ➜ hence the term “bi-polar.”
  • Affects thoughts, emotions and behaviour; significantly impairs social, occupational and interpersonal functioning.

Core Diagnostic Characteristics

  • Presence of manic and/or depressive episodes.
  • Episodes are usually separated by periods of euthymia but may also appear as mixed episodes (simultaneous manic & depressive symptoms).
  • Cycling can be slow (months) or rapid (≥4 mood episodes per year).

Manic Episode

  • Elevated, expansive or irritable mood lasting >1 week (or any duration if hospitalisation is required).
  • Key features:
    • Hyperactivity & increased goal-directed activity
    • Pressured, rapid or excessive speech ("talkative")
    • Decreased need for sleep / insomnia
    • Inflated self-esteem or grandiosity
    • Flight of ideas / racing thoughts ➜ often perceived by artists as enhanced creativity (new business ideas, music, painting, etc.).
    • Increased sexual drive / risky behaviours
  • Functional impact: may lead to impaired judgement, financial problems, legal issues, relationship strain.

Depressive Episode

  • Persistent sadness, hopelessness, anhedonia (loss of interest or pleasure).
  • Additional symptoms: psychomotor retardation, fatigue, sleep/appetite changes, feelings of worthlessness, suicidal ideation.

Bipolar Subtypes

  • Bipolar I
    • At least one full-blown manic episode.
    • Depressive episodes may occur but are not required for diagnosis.
  • Bipolar II
    • At least one hypomanic episode (milder form of mania) and one major depressive episode.
    • No history of full manic episodes.

Mixed Episodes & Rapid Cycling

  • Mixed episode: criteria met for both manic & depressive episodes nearly every day for ≥1 week.
  • Rapid cycling: ≥4 mood episodes (manic, hypomanic or depressive) within a 12-month period ➜ associated with poorer prognosis & medication challenges.

Triggers & Risk Factors (briefly mentioned)

  • Stressful life events, sleep deprivation, substance abuse, hormonal changes, seasonal changes.
  • Genetic predisposition; first-degree relatives at higher risk.

Functional Impairment

  • Disruption of work/school, strained relationships, financial/legal complications.
  • Comorbidities common: anxiety, substance use, ADHD, metabolic syndromes.

Treatment Overview

  • Multimodal approach: pharmacotherapy + psychotherapy + lifestyle optimisation.
  • Goals: stabilise mood, prevent relapse, minimise cycling, improve functioning.
Pharmacologic Management
  1. Mood stabilisers (first-line)
    • Lithium (elemental lithium) – gold standard; reduces suicide risk.
    • Anticonvulsants with mood-stabilising properties:
      • Carbamazepine
      • Sodium valproate (valproic acid)
      • Lamotrigine
      • Clonazepam (benzodiazepine; mainly adjunct for acute agitation/insomnia)
  2. Second-generation (atypical) antipsychotics – target acute mania & maintenance
    • Olanzapine, Quetiapine, others.
    • In acute manic attack: antipsychotic given first to “calm the firing neurons.”
  3. Antidepressants – treat depressive phase but never used alone (risk of inducing mania/rapid cycling).
    • Must be combined with a mood stabiliser or antipsychotic.
Psychotherapy & Psychoeducation
  • Cognitive-behavioural therapy (CBT) – identify early warning signs, restructure negative thoughts.
  • Psychoeducation – teaches patients & families about illness course, medication adherence, relapse prevention.
  • Interpersonal & social rhythm therapy – stabilises daily routines & sleep–wake cycles.
Lifestyle & Self-Management
  • Maintain regular sleep schedule; sleep deprivation = potent manic trigger.
  • Stress management techniques (mindfulness, relaxation, time management).
  • Avoid substance abuse (alcohol, stimulants, cannabis) ➜ can precipitate episodes.
  • Consistent exercise, balanced diet, adherence to medication/therapy plans.

Clinical Pearls & Safety Considerations

  • Always rule out secondary causes (thyroid dysfunction, medication side effects, substance intoxication).
  • Monitor lithium levels (narrow therapeutic window) & renal/thyroid function.
  • Valproate: monitor liver function & platelets; teratogenic (contraindicated in pregnancy).
  • Antipsychotics: watch for metabolic syndrome, EPS, sedation.
  • Suicide risk: high during depressive & mixed states—screen routinely.
  • Collaborative care: coordinate with psychiatrists, psychologists, primary care, family.

Ethical & Practical Implications

  • Informed consent & capacity: mania may impair judgement ➜ sometimes necessitates involuntary treatment for patient safety.
  • Stigma reduction: educate public & patients to enhance adherence & social support.
  • Occupational accommodations: flexible scheduling, stress-reduction measures.

Quick Recall Checklist

  • Bipolar I = full mania ± depression; Bipolar II = hypomania + depression.
  • Mania ≥1 week, hypomania ≥4 days.
  • Never give antidepressant monotherapy.
  • Lithium is first-line mood stabiliser; monitor levels.
  • Combine meds + CBT/psychoeducation + lifestyle management for optimal outcomes.