Acute mania is a psychiatric emergency characterized by elevated, expansive, or irritable mood with increased energy/activity lasting ≥1 week (or any duration if hospitalization is required), causing marked functional impairment. [1-2] The following is a comprehensive clinical summary organized for emergency medicine and primary care workflows.
The following figure from the RANZCP guidelines provides an overview of bipolar disorder symptoms, epidemiology, and the cyclical nature of mood episodes:
1. History
- Key HPI questions: Characterize the mood change — euphoric, expansive, or irritable? When did it start? How long has it lasted? Is this a change from baseline?
- Symptom characterization (DSM-5-TR Criterion B — ≥3 symptoms, or ≥4 if mood is only irritable): [1-2]
- Inflated self-esteem or grandiosity
- Decreased need for sleep (feels rested after 3 hours)
- Pressured speech
- Flight of ideas / racing thoughts
- Distractibility
- Increased goal-directed activity or psychomotor agitation
- Excessive involvement in risky activities (spending sprees, sexual indiscretions, foolish investments)
- Timing/triggers: Onset over days; ask about recent stressors, goal-attainment events (marriage, promotion), sleep deprivation, substance use, recent medication changes (especially antidepressant or stimulant initiation) [1]
- Important negatives: Rule out substance intoxication, recent steroid use, new medical illness, head trauma, seizures [1][4]
2. Alarm Features
- Psychotic features (hallucinations, delusions — present in >50% of bipolar I manic episodes) [5]
- Suicidal or homicidal ideation — suicide risk in bipolar disorder is 20–30× the general population; mixed features carry the highest acute suicide risk [5-6]
- Aggressive or violent behavior — patients who are aggressive or psychotic are more likely to require involuntary admission [2]
- Severe impaired judgment leading to dangerous behavior (driving recklessly, giving away life savings)
- Signs of delirium or altered sensorium suggesting organic etiology
- First episode of mania in a patient >35 years — raises suspicion for secondary/organic mania [7]
- Catatonic features or severe psychomotor agitation
3. Medications
Medications that can trigger or worsen mania: [2][4]
- Antidepressants (SSRIs, SNRIs, TCAs) — discontinue during acute mania
- Stimulants (methylphenidate, amphetamines) — discontinue
- Corticosteroids, levodopa, isoniazid, baclofen, HIV medications (integrase inhibitors)
First-line acute mania treatment (per CANMAT/ISBD and VA/DoD guidelines): [5][8]
- Monotherapy: Lithium, quetiapine, valproate, aripiprazole, risperidone, asenapine, cariprazine, paliperidone
- Combination therapy (for severe mania or monotherapy failure): Lithium or valproate + quetiapine, aripiprazole, risperidone, or asenapine
- Acute agitation: Benzodiazepines (lorazepam), haloperidol, sublingual dexmedetomidine, or inhaled loxapine for rapid control [2][5]
Key medication pearls
- Valproic acid can be loaded rapidly (20–30 mg/kg/day) — often preferred for acute mania due to fast titration [4]
- Lithium is the treatment of choice for classic euphoric mania and is the only agent with demonstrated anti-suicidal properties; requires ~5 days to reach steady state; target serum level 0.8–1.2 mEq/L acutely [4][9]
- Olanzapine is effective but relegated to second-line due to severe metabolic adverse effects [8]
- Monotherapy with antidepressants is contraindicated in mania and mixed features [4]
4. Diet
- Caffeine can exacerbate insomnia, agitation, and anxiety — limit or avoid during acute episodes
- Alcohol and cannabis worsen mood instability and should be avoided; cannabis specifically worsens mood swings in bipolar disorder [10]
- Ensure adequate hydration, especially if starting lithium (dehydration increases lithium toxicity risk) [9]
- Long-term: Mediterranean-style diet and regular meal timing may support circadian rhythm stability
5. Review of Systems
- Psychiatric: Sleep pattern changes, suicidal/homicidal ideation, hallucinations, delusions, anxiety, substance use
- Neurologic: Headache, seizures, focal deficits (to rule out organic causes)
- Endocrine: Heat/cold intolerance, weight changes (thyroid disease)
- Infectious: Fever, recent illness (encephalitis, HIV, syphilis)
- Reproductive: Pregnancy status (many mood stabilizers are teratogenic), menstrual changes
6. Collateral History and Family History
- Collateral information is critical — patients in mania often lack insight and may not report symptoms accurately; contact family, friends, or prior providers [10]
- Ask collateral sources about: baseline behavior, timeline of changes, sleep patterns, spending habits, sexual behavior, substance use, medication adherence
- Family history: Bipolar disorder is highly heritable (60–80%); first-degree relative risk is 5–10% vs. ~1% general population. Family history of bipolar disorder, suicide, or psychotic illness strongly supports the diagnosis [1][5][11-12]
- Social context: Housing stability, employment, legal issues, access to firearms, dependent children
7. Risk Factors
- Family history of bipolar disorder or mood disorders (strongest risk factor) [1][5]
- Genetics: Heritability 60–80%; polygenic architecture with overlap with schizophrenia and MDD [5][11]
- Childhood adversity (emotional trauma, parental psychopathology, family conflict) — associated with earlier onset and worse prognosis [1]
- Substance use — alcohol (comorbid in 50–60%), cannabis, stimulants, hallucinogens [10-11]
- Sleep deprivation — potent trigger for manic episodes
- Recent antidepressant or stimulant initiation [2]
- Goal-attainment life events (promotion, marriage) specifically linked to manic relapse [1]
- Early onset of illness and prior manic episodes predict recurrence
8. Differential Diagnosis
Cannot-miss diagnoses
- Substance intoxication/withdrawal — stimulants (cocaine, methamphetamine), PCP, hallucinogens, alcohol withdrawal [4][11]
- Delirium from medical illness (infection, metabolic derangement)
- Anti-NMDA receptor encephalitis — especially in young women with new-onset psychosis and mania [1]
- Thyroid storm / hyperthyroidism [4]
Important alternatives
- Schizoaffective disorder — psychosis persists outside mood episodes [11][13]
- Schizophrenia — difficult to distinguish at first episode; look for prominent affective symptoms and episodic course in bipolar [11]
- Borderline personality disorder — mood shifts are rapid, interpersonally triggered, and lack the sustained elevated energy/decreased sleep of mania [5][11]
- ADHD — chronic symptoms from childhood, no episodic psychosis or affective episodes [5][11]
- Secondary mania: Cushing disease, multiple sclerosis, stroke, TBI, neurosyphilis, HIV encephalitis, complex partial seizures, vitamin deficiencies (B12, folate, thiamine) [1][4]
- Medication-induced mania: Corticosteroids, levodopa, antidepressants [1][4]
9. Past Medical History
- Prior manic, hypomanic, or depressive episodes — number, severity, hospitalizations, treatments tried and response
- Medication history — prior mood stabilizers, antipsychotics, antidepressants (including dosages, adverse effects, and efficacy) [4]
- History of psychosis, suicide attempts, self-harm
- Substance use history (including cannabis, caffeine, supplements) [10]
- Comorbid psychiatric conditions: anxiety disorders (~71%), substance use (~56%), personality disorders (~36%), ADHD (10–20%) [2]
- Medical comorbidities: thyroid disease, renal disease, cardiovascular disease, metabolic syndrome
- Surgical history, pregnancy history
10. Physical Exam
Vital signs
- Tachycardia, hypertension (from agitation/sympathetic activation)
- Fever (raises concern for delirium, infection, NMS, serotonin syndrome)
Mental status exam (key findings)
- Appearance: Bright/flamboyant clothing, poor grooming, or excessive makeup
- Behavior: Psychomotor agitation, restlessness, disinhibition
- Speech: Pressured, rapid, loud, difficult to interrupt
- Mood: "Great," "on top of the world," or irritable
- Affect: Euphoric, labile, or irritable
- Thought process: Flight of ideas, tangentiality, looseness of associations
- Thought content: Grandiose delusions, paranoia; assess for SI/HI
- Perception: Auditory/visual hallucinations (if psychotic features)
- Cognition: Distractible, impaired concentration
- Insight/judgment: Typically poor — this is a hallmark of mania [1-2]
Focused neurologic exam: Assess for focal deficits, signs of encephalitis, or catatonia — especially in first-episode presentations [4][10]
11. Lab Studies
Recommended initial labs (per VA/DoD guidelines): [4][10]
- CBC — rule out anemia, infection
- CMP — electrolytes, renal function, glucose, liver function (baseline before mood stabilizers)
- TSH — rule out hyper/hypothyroidism; baseline before lithium
- Urine drug screen — rule out substance-induced mania
- Pregnancy test — many mood stabilizers are teratogenic (valproate is Category X)
- Lithium level (if already on lithium) — therapeutic range 0.8–1.2 mEq/L acutely [9]
- Valproic acid level (if applicable)
Additional labs based on clinical suspicion
- Fasting glucose, lipid panel (baseline before antipsychotics) [4]
- RPR/VDRL (neurosyphilis), HIV (if first episode or risk factors)
- Ammonia (if on valproate with mental status changes) [4]
- B12, folate, thiamine (if nutritional deficiency suspected)
- Prolactin (if on antipsychotics with galactorrhea/amenorrhea)
12. Imaging
- Routine neuroimaging is not indicated for known bipolar disorder with typical presentation [10]
- Reserve CT head or MRI brain for: [4][10]
- First episode of mania (especially age >35)
- Abnormal neurologic exam findings
- Atypical presentation or new-onset psychosis
- Suspicion for stroke, TBI, mass lesion, encephalitis
- MRI is preferred over CT when imaging is indicated [4]
- EEG if seizure disorder is suspected [10]
13. Special Tests
- Young Mania Rating Scale (YMRS): Standardized 11-item clinician-rated scale for severity of manic symptoms; useful for tracking treatment response
- Mood Disorder Questionnaire (MDQ): Screening tool for bipolar spectrum disorders in primary care [10]
- Columbia Suicide Severity Rating Scale (C-SSRS) or PHQ-9 Item 9: For structured suicide risk assessment [10]
- Lumbar puncture: If suspicion for encephalitis (especially anti-NMDA receptor encephalitis) or neurosyphilis
- EEG: If seizure disorder or encephalopathy is suspected [10]
14. ECG
Indications for ECG: [4][14]
- Patients >40 years old
- Before starting lithium, antipsychotics, or other QTc-prolonging medications
- Patients with cardiac history, electrolyte abnormalities, or multiple QTc-prolonging medications
Key ECG findings to recognize
- Lithium: T-wave flattening/inversion, sinus node dysfunction, AV block, QTc prolongation (especially at toxic levels — QTc >500 ms in 24% of lithium intoxication episodes) [9][15-17]
- Antipsychotics: QTc prolongation (ziprasidone and thioridazine carry highest risk; quetiapine and risperidone have lower risk) [14]
- QTc >500 ms — high risk for torsades de pointes; consider alternative agents or cardiology consultation [14]
15. Assessment
Clinical summary: Acute mania is defined by DSM-5-TR as ≥1 week of elevated/expansive/irritable mood with increased energy plus ≥3 (or ≥4 if irritable only) associated symptoms causing marked impairment or necessitating hospitalization. [1] It is a medical emergency requiring urgent treatment to decrease risk of harm. [11]
Severity stratification
- Mild/moderate: Hypomanic features, no psychosis, some preserved insight, no imminent danger
- Severe: Psychotic features, aggressive behavior, complete loss of insight, inability to care for self, danger to self or others
Atypical presentations to consider
- Mixed features (concurrent depressive symptoms) — higher suicide risk, lithium less effective [4][6]
- Rapid cycling (≥4 episodes/year) — lithium less effective; valproate or atypical antipsychotics preferred [4]
- Irritable-predominant mania may be mistaken for agitated depression or personality disorder
Complications: Financial ruin, legal consequences, STIs from risky sexual behavior, relationship destruction, substance use, violence, suicide [2][5]
16. Treatment Plan
Immediate stabilization (ED)
- Ensure safety — 1:1 observation if needed, remove dangerous items, de-escalation techniques
- Acute agitation: Lorazepam 1–2 mg PO/IM, haloperidol 5 mg IM ± diphenhydramine 50 mg IM, or olanzapine 10 mg IM. Sublingual dexmedetomidine or inhaled loxapine are newer options [2][5]
- Discontinue antidepressants and stimulants [2]
Pharmacotherapy initiation: [5][8]
- Classic euphoric mania: Lithium (300 mg TID, titrate to serum level 0.8–1.2 mEq/L) — often combined with an antipsychotic acutely due to slow onset [4]
- Rapid control needed: Valproic acid loading (20–30 mg/kg/day) or atypical antipsychotic (quetiapine, risperidone, aripiprazole) [4]
- Severe mania: Combination therapy — lithium or valproate + atypical antipsychotic is more effective than monotherapy [5][13]
- Mixed features: Avoid lithium monotherapy; prefer valproate or atypical antipsychotics [4]
- Refractory mania: Consider ECT (bifrontal), especially with psychosis or aggression [13]
Maintenance (long-term)
- Pharmacotherapy should be continued indefinitely to prevent relapse (25% relapse in year 1 even with treatment; >70% within 5 years without treatment) [4]
- Lithium remains the cornerstone of maintenance therapy and the only agent with demonstrated anti-suicidal properties [4-5]
17. Disposition
Admission criteria: [2][4][10]
- Psychotic features
- Suicidal or homicidal ideation
- Aggressive or violent behavior
- Severe impairment in judgment with inability to care for self
- Inability to ensure safety in outpatient setting
- First episode of mania
- Involuntary admission may be necessary when impaired judgment adversely affects capacity to consent [2]
Observation/short-stay considerations
Discharge criteria
- Hypomania without psychosis, with intact insight, no safety concerns, reliable social support, and confirmed outpatient psychiatric follow-up
- Known bipolar disorder with mild exacerbation, medication adjustment made, and close follow-up arranged
Specialist consultation triggers
- All patients with acute mania should have psychiatry consultation [10]
- Neurology consultation if organic etiology suspected
- Cardiology if significant ECG abnormalities
18. Follow Up / Return Precautions
Follow-up timing
- Psychiatry follow-up within 1 week of ED discharge or sooner
- If lithium initiated: serum lithium level in 5–7 days, then weekly until stable; renal function and TSH every 6 months long-term [9]
- If valproate initiated: level in 3–5 days; LFTs and CBC periodically
- If antipsychotic initiated: metabolic monitoring (fasting glucose, lipids, weight) at baseline, 3 months, then annually
Return precautions — counsel patient AND family/support person:
- Return immediately for worsening agitation, aggression, psychosis, suicidal thoughts, inability to sleep for >48 hours, or bizarre/dangerous behavior
- Do not stop medications without medical guidance
- Avoid alcohol, cannabis, and stimulants [10]
- Maintain regular sleep schedule — sleep deprivation is a potent trigger
Patient/family counseling
- Educate about the chronic, relapsing nature of bipolar disorder [4]
- Discuss teratogenic risks of mood stabilizers and importance of contraception [4]
- Encourage keeping a medication log (drugs, doses, side effects, efficacy) for future reference [4]
- Early warning signs of relapse: sleep disturbance, agitation, increased goal-directed activity, disruption of routine [4]
- Safety planning: restrict access to firearms and lethal means [5][10]
References
1. Diagnostic and Statistical Manual of Mental Disorders. — Dilip V. Jeste, Jeffrey A. Lieberman, David Fassler, et al American Psychiatric Association (2022). 2022.
2. Diagnosis and Treatment of Bipolar Disorder: A Review. — Nierenberg AA, Agustini B, Köhler-Forsberg O, et al. The Journal of the American Medical Association. 2023.
3. The 2020 Royal Australian and New Zealand College of psychiatrists clinical practice guidelines for mood disorders: Bipolar disorder summary. — Malhi GS, Bell E, Boyce P, et al. Bipolar Disorders. 2020.
4. Bipolar Disorders: Evaluation and Treatment. — Marzani G, Price Neff A. American Family Physician. 2021.
5. Bipolar Disorder. — Singh B, Swartz HA, Cuellar-Barboza AB, et al. Lancet. 2025.
6. Bipolar Disorder and Suicide: A Review. — Miller JN, Black DW. Current Psychiatry Reports. 2020.
7. Organic Causes of Mania. — Larson EW, Richelson E. Mayo Clinic Proceedings. 1988.
8. Management of Bipolar Disorder: Guidelines From the VA/DoD. — Arnold MJ. American Family Physician. 2024.
9. FDA Drug Label. — Updated date: 2023-10-02. Food and Drug Administration.
10. Management of Bipolar Disorder (BD) (2023). — Thad Abrams MD MS, Jennifer Bell MD, Paulette Cazares MD MPH, et al Department of Veterans Affairs. 2023.
11. Bipolar Disorders. — McIntyre RS, Berk M, Brietzke E, et al. Lancet. 2020.
12. Genetics of Bipolar Disorder. — Craddock N, Sklar P. Lancet. 2013.
13. Bipolar Disorder. — Carvalho AF, Firth J, Vieta E. The New England Journal of Medicine. 2020.
14. QTc Monitoring in Adults With Medical and Psychiatric Comorbidities: Expert Consensus From the Association of Medicine and Psychiatry. — Xiong GL, Pinkhasov A, Mangal JP, et al. Journal of Psychosomatic Research. 2020.
15. Drugs That May Cause or Exacerbate Heart Failure: A Scientific Statement From the American Heart Association. — Page RL, O'Bryant CL, Cheng D, et al. Circulation. 2016.
16. Effects of Toxic Lithium Levels on ECG-Findings From the LiSIE Retrospective Cohort Study. — Truedson P, Ott M, Lindmark K, et al. Journal of Clinical Medicine. 2022.
17. The Cardiovascular Effects of Lithium in Man. A Review of the Literature. — Tilkian AG, Schroeder JS, Kao JJ, Hultgren HN. The American Journal of Medicine. 1976.