Shawn Faust, DNP, PMHNP-BC
Published on 6/22/2026
What Is Bipolar I?
The word “Bipolar” refers to the two poles of mood: Manic and Depressive.
Bipolar I is a type of mood disorder defined by the presence of at least one Manic episode.¹˒² Depressive episodes are characterized by low mood, loss of energy, difficulty functioning, and in some cases, thoughts of suicide. Most people with Bipolar I experience depressive episodes, though depression is not required for diagnosis.² Bipolar I is typically dominated by depressive episodes, which tend to be longer and more frequent than Manic episodes.¹˒³
(Hypo)manic episodes are the opposite — periods of abnormally elevated or irritable mood, increased energy, decreased need for sleep, and impulsive behavior.² During Mania, individuals may feel invincible, sleep very little, take on risky behaviors, spend excessively, or make impulsive life-altering decisions — often without recognizing anything is wrong.¹
Bipolar I affects approximately 1–2% of the population worldwide, affecting men and women at roughly equal rates, though women tend to experience more depressive episodes and rapid cycling.³ The average age of onset is the late teens to mid-20s.¹˒³ The average delay from symptom onset to correct diagnosis is approximately 5–10 years.³
What Bipolar I Feels Like
For many people with Bipolar I, depression is the dominant experience. The depressive episodes feel like a heavy, pervasive sadness — loss of interest in everything, crushing fatigue, difficulty thinking, and sometimes thoughts of suicide. These episodes can last weeks to months and are often the reason people first seek help. The contrast between feeling functional and being unable to get out of bed can be disorienting and demoralizing.
Then there are the manic episodes — and they often feel like relief. There is a surge of extraordinary energy, confidence, and clarity. Sleep feels unnecessary. Thoughts race, ideas flow rapidly, and there may be a sense of being uniquely talented or invincible. Conversations become fast and pressured. Impulsive decisions feel brilliant in the moment — spending sprees, risky business ventures, sexual indiscretions, or sudden life changes. But mania is not simply feeling good. It can escalate into irritability, agitation, and paranoia. Judgment becomes severely impaired, and the consequences — financial ruin, damaged relationships, legal problems, job loss — often become apparent only after the episode ends.
Between episodes, many people feel like themselves again — which can make it tempting to stop treatment. But without ongoing treatment, episodes tend to recur and can become more frequent and severe over time.⁴˒⁵ Many people describe not trusting their own moods: “Am I thinking clearly, or is this the start of something?”
Signs and Symptoms of Bipolar I
Bipolar I involves distinct episodes of Mania and, in most cases, depressive episodes.
DSM-5 Diagnostic Criteria
Manic Episode (lasting at least 7 days, or any duration if hospitalization is required):²
- Abnormally elevated, expansive, or irritable mood
- Markedly increased energy or activity
- Decreased need for sleep (e.g., feeling rested after only 2–3 hours)
- Rapid, pressured speech — talking more than usual or feeling pressure to keep talking
- Racing thoughts or flight of ideas
- Distractibility
- Increased goal-directed activity (at work, socially, or sexually) or psychomotor agitation
- Excessive involvement in risky activities (spending sprees, reckless driving, impulsive sexual behavior, foolish business investments)
Key distinction from Hypomania: The difference between full Mania and Hypomania is based on duration — Mania lasts 7 or more days (or any duration if hospitalization or psychosis occurs), while Hypomania lasts at least 4 consecutive days.²
Depressive Episode (lasting at least 2 weeks):²
- Persistent sadness, emptiness, or hopelessness
- Loss of interest or pleasure in activities
- Fatigue or loss of energy
- Sleep disturbance (insomnia or hypersomnia)
- Changes in appetite or weight
- Difficulty concentrating or making decisions
- Feelings of worthlessness or excessive guilt
- Psychomotor retardation (slowed movements/speech) or agitation
- Thoughts of death or suicide
Mixed Features Specifier: Some episodes involve simultaneous manic and depressive symptoms — for example, racing thoughts and high energy combined with despair and suicidal thinking. These mixed episodes can be particularly dangerous.²
Additional & Associated Features
Beyond the formal diagnostic criteria, Bipolar I may also involve:²
- Grandiose delusions, paranoia, or hallucinations during severe manic episodes
- Poor insight during mania — most people do not recognize their behavior as abnormal while in the episode
- Impaired judgment leading to financial, legal, interpersonal, or occupational consequences
- Rapid cycling (four or more mood episodes per year)
How Bipolar I Affects Daily Life
Bipolar I can have a profound impact on every area of life. Depressive episodes are often the longest mood phase and can be deeply disabling — work productivity drops, relationships suffer from withdrawal and irritability, and self-care deteriorates. Many people find that depression, not Mania, is the most burdensome part of the illness.¹˒³
Manic episodes bring a different kind of disruption. Because Mania lasts longer than Hypomania and often occurs without the person recognizing anything is wrong, the consequences can be severe — financial problems from excessive spending, damaged relationships from erratic behavior, job loss from poor judgment, or legal difficulties. The aftermath of a Manic episode often includes shame, regret, and the difficult work of repairing what was damaged.
Between episodes, many people function well, but the unpredictability of the illness creates ongoing anxiety about when the next episode will occur. Maintaining stable employment, relationships, and daily routines requires ongoing treatment and self-management.
Bipolar I carries one of the highest suicide rates of any psychiatric condition.¹˒³ The combination of prolonged depressive episodes and impulsivity during mood instability contributes to this risk.
Helping You Understand Why.
Common Causes and Risk Factors for Bipolar I
Bipolar I does not have a single cause. It arises from a combination of biological, psychological, and environmental factors.
Genetics: Bipolar is one of the most heritable psychiatric conditions. First-degree relatives of someone with Bipolar I have approximately a 5–10 times higher risk of developing the condition.² Twin studies suggest heritability of approximately 60–85%.³˒⁴
Brain biology: Neuroimaging studies show differences in brain structure and function in people with Bipolar, particularly in regions involved in emotional regulation (prefrontal cortex, amygdala). Disruptions in neurotransmitter systems — including dopamine, serotonin, and glutamate — are implicated.³˒⁴
Temperament: People with high emotional reactivity or traits associated with novelty-seeking and impulsivity may be at increased risk.²
Life experiences: While genetics create vulnerability, episodes are often triggered by major life stressors, sleep disruption, substance use (particularly stimulants and cannabis), and seasonal changes.²˒³ Sleep deprivation is a particularly potent trigger for Manic episodes. Childhood trauma, including physical, sexual, and emotional abuse, is associated with earlier onset, more severe course, and higher rates of rapid cycling and suicide attempts.²
Clinical red flags for Bipolar I (vs. MDD): Early age of onset, family history of Bipolar, multiple depressive episodes, atypical depressive features (hypersomnia, increased appetite, leaden paralysis), and antidepressant-induced (hypo)mania or mood instability all suggest Bipolar rather than MDD.³
Other factors: Female sex is associated with more depressive episodes and rapid cycling. Substance use — particularly stimulants, cannabis, and alcohol — can trigger or worsen episodes.²˒³
How Bipolar I Is Diagnosed
Bipolar I is diagnosed through a clinical interview with a mental health professional — not through lab work or imaging. Brief screening questionnaires such as the Mood Disorder Questionnaire (MDQ) may be used to help identify symptoms and track progress over time.¹ The clinician will ask about current and past mood episodes, including any history of periods with unusually elevated energy, decreased need for sleep, impulsive behavior, or grandiosity. Collateral information from family members can be invaluable, as people in the midst of Mania often do not recognize their behavior as abnormal.¹
To meet diagnostic criteria, there must be at least one lifetime Manic episode — a period of abnormally elevated or irritable mood with increased energy lasting at least seven days (or any duration if hospitalization is required).² Most people with Bipolar I also experience depressive episodes, though depression is not required for diagnosis.
The clinician will also consider whether symptoms are better explained by another mental health condition. MDD shares identical depressive episodes, but lacks the history of Manic episodes. Bipolar II involves Hypomanic episodes (shorter and without severe impairment or psychosis) rather than full Mania.¹˒²
The evaluation is straightforward and conversational — the goal is to understand your experience so the right treatment can begin.
Treatment for Bipolar I
Bipolar I responds well to treatment. The two main evidence-based approaches are medication and psychotherapy. Unlike anxiety disorders and depression, medication is the mainstay of treatment for Bipolar I — therapy alone will not treat this condition.¹ Most people improve significantly with evidence-based treatment, and many achieve long-term stability.
Lifestyle strategies: Maintaining regular sleep schedules is critical — sleep disruption is one of the most potent triggers for (hypo)manic episodes.²˒³ Avoiding alcohol and recreational drugs, managing stress, and monitoring mood are essential components of long-term stability.
Medication: Bipolar I requires lifelong medication.¹˒³ Treatment typically involves one or more of the following medication classes:
Lithium and valproate: Lithium is the gold-standard mood stabilizer — effective for treating and preventing Manic episodes, with additional benefit for depressive episodes.¹˒³ It is the only Bipolar medication with consistent evidence for reducing suicide risk.⁶˒⁷ Lithium requires regular blood level monitoring along with kidney and thyroid function tests. Valproate/divalproex (Depakote) is another established mood stabilizer, particularly effective for acute Mania and mixed episodes.¹
Lamotrigine: Lamotrigine (Lamictal) has strong evidence for preventing depressive episodes and is often a cornerstone of long-term maintenance.¹ It is not effective for treating or preventing acute Mania. Lamotrigine requires slow dose titration to reduce the risk of serious skin reactions.
Atypical antipsychotics: This class spans both poles of the illness. For (hypo)manic episodes, aripiprazole (Abilify) and cariprazine (Vraylar) are often preferred for their lower metabolic and sedation burden; risperidone (Risperdal), olanzapine (Zyprexa), and quetiapine (Seroquel) are also effective.¹ For depressive episodes, quetiapine, lurasidone (Latuda), cariprazine, lumateperone (Caplyta), and the olanzapine/fluoxetine combination (Symbyax) have evidence of efficacy.³
Antidepressants: Antidepressants are used cautiously in Bipolar I, since they can trigger (Hypo)mania or rapid cycling. When prescribed, they are always paired with a mood stabilizer or antipsychotic, never used alone.¹˒³
Psychotherapy: CBT and psychoeducation have the strongest evidence as adjuncts to medication — reducing relapse rates, depressive symptoms, and improving functioning.¹ DBT may be particularly helpful for patients with emotional dysregulation or suicidal ideation.
Why lifelong treatment matters: Bipolar I is a progressive condition. Without sustained treatment, episodes tend to become more frequent, more severe, and harder to treat over time.⁴˒⁵ Research suggests that treatment response is greatest in the early stages of the illness, making early and sustained treatment critical.⁸ Feeling well is often a sign that treatment is working — stopping medication is one of the most common causes of relapse.
When to Seek Professional Help for Bipolar I
Consider seeking help if:
- Antidepressant treatment has caused mood instability, agitation, or “switching” to an elevated mood
- There have been periods of unusually elevated mood, energy, or irritability lasting several days or more
- Impulsive or risky behavior is occurring that is out of character
- Depression is severe or persistent
- Sleep patterns have changed dramatically (particularly a decreased need for sleep without fatigue)
- There is reliance on alcohol or other substances to manage mood
Go to the emergency room or call 911 if experiencing psychotic symptoms (delusions, hallucinations) or dangerous behavior.
Seek immediate help if experiencing thoughts of self-harm or suicide. Contact the 988 Suicide and Crisis Lifeline by calling or texting 988, available 24/7.
Conditions That Can Look Similar to Bipolar I
Major Depressive Disorder (MDD): Bipolar depression looks identical to unipolar depression. The critical difference is the history of Manic episodes. Misdiagnosis as MDD is common and can lead to inappropriate treatment with antidepressants alone.³
Bipolar II: Bipolar II involves Hypomanic episodes rather than full Manic episodes. The distinction matters for treatment planning.²
Schizoaffective Disorder: Schizoaffective Disorder involves mood episodes along with psychotic symptoms that also occur outside of mood episodes. In Bipolar I, psychotic symptoms occur only during mood episodes.²
Frequently Asked Questions About Bipolar I
Is Bipolar I the same as mood swings?
No. Everyone experiences mood fluctuations. Bipolar I involves distinct Manic and depressive episodes that are far more intense, last days to weeks, and cause significant impairment.¹˒²
Can Bipolar I be cured?
No. Bipolar I is a lifelong condition, but it is highly manageable with treatment. Many people lead stable, productive lives with appropriate medication and support.¹
Can Bipolar I become worse without treatment?
Yes. Without treatment, episodes can become more frequent, last longer, and become harder to treat.⁴˒⁵ Early and sustained treatment is one of the most important factors in long-term stability.⁸
Why do people with Bipolar I stop taking their medication?
During Mania, people often feel better than ever and don’t believe they need medication. During stable periods, side effects can feel burdensome when symptoms are absent. But feeling well is often a sign that treatment is working — stopping medication is one of the most common causes of relapse.¹
References
- Nierenberg AA, Agustini B, Köhler-Forsberg O, et al. Diagnosis and Treatment of Bipolar Disorder: A Review. JAMA. 2023;330(14):1370-1380.
- American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR). American Psychiatric Publishing; 2022.
- McIntyre RS, Berk M, Brietzke E, et al. Bipolar Disorders. Lancet. 2020;396(10265):1841-1856.
- Carvalho AF, Firth J, Vieta E. Bipolar Disorder. N Engl J Med. 2020;383(1):58-66.
- Post RM. The Kindling/Sensitization Model and Early Life Stress. Curr Top Behav Neurosci. 2021;48:255-275.
- Cipriani A, Hawton K, Stockton S, Geddes JR. Lithium in the Prevention of Suicide in Mood Disorders: Updated Systematic Review and Meta-Analysis. BMJ. 2013;346:f3646.
- Fitzgerald C, Christensen RHB, Simons J, et al. Effectiveness of Medical Treatment for Bipolar Disorder Regarding Suicide, Self-Harm and Psychiatric Hospital Admission: Between- and Within-Individual Study on Danish National Data. Br J Psychiatry. 2022;221(4):637-643.
- Berk M, Brnabic A, Dodd S, et al. Does Stage of Illness Impact Treatment Response in Bipolar Disorder? Empirical Treatment Data and Their Implication for the Staging Model and Early Intervention. Bipolar Disord. 2011;13(1):87-98.
6/22/2026