Mood disorders (depression and bipolar)
Introduction
Mood disorders affect how individuals feel, think, behave, and function in daily life. They are characterized by persistent disturbances in mood that interfere with relationships, work, self-care, and safety. Depression and bipolar disorder exist on a spectrum of mood dysregulation and are among the most frequently tested psychiatric conditions on the NCLEX.
For nurses, the priority is not diagnosis but assessment, safety, therapeutic communication, and medication monitoring. Many NCLEX questions focus on recognizing mood patterns, identifying suicide risk, responding to mania safely, and choosing the most therapeutic nursing action.
Learning objectives
By the end of this section, you should be able to:
- Differentiate depressive episodes from manic and hypomanic episodes.
- Identify common assessment findings in mood disorders.
- Recognize suicide risk and implement safety interventions.
- Apply nursing care strategies for both depression and bipolar disorder.
- Anticipate medication-related nursing considerations.
- Answer NCLEX-style questions involving mood instability and safety.
Overview of mood disorders
Mood disorders involve disruptions in emotional regulation that persist beyond normal mood fluctuations.
Core features
- Altered mood (sadness, irritability, euphoria).
- Changes in energy and activity level.
- Impaired concentration and decision-making.
- Sleep and appetite disturbances.
- Impaired functioning.
- Increased suicide risk.
- //////Caption: Major depressive disorder and bipolar disorder at a glance.
- Illustration type: Comparison infographic
- Illustration note: A side-by-side infographic comparing major depressive disorder and bipolar disorder, highlighting predominant mood changes, energy levels, sleep patterns, activity levels, judgment, and typical clinical presentation.///////
Depressive disorders
Depression is more than sadness. It is a pervasive condition that affects emotional, cognitive, physical, and behavioral functioning.
Assessment findings in depression
- Persistent sadness or emptiness.
- Anhedonia (loss of interest or pleasure).
- Fatigue or low energy.
- Sleep disturbances (insomnia or hypersomnia).
- Appetite or weight changes.
- Impaired concentration.
- Feelings of worthlessness or guilt.
- Slowed speech or movement.
- Suicidal ideation or passive death wishes.
Nursing interventions
- Assess suicide risk directly and repeatedly.
- Establish a therapeutic relationship.
- Encourage expression of feelings.
- Promote structure and routine.
- Assist with basic self-care.
- Reinforce medication adherence.
- Coordinate mental health referrals.
Bipolar disorder
Bipolar disorder includes episodes of mania or hypomania, often alternating with periods of depression. Manic episodes are medical emergencies characterized by deteriorating judgment, sleep disturbances, and impaired impulse control.
Assessment findings in mania
- Elevated or irritable mood
- Decreased need for sleep
- Pressured or rapid speech
- Flight of ideas
- Distractibility
- Grandiosity
- Impulsive or risky behaviors
- Poor judgment
- Agitation or aggression
Nursing interventions during mania
- Ensure the safety of client and others.
- Set clear, consistent limits.
- Reduce environmental stimuli.
- Use calm, firm communication.
- Avoid power struggles.
- Provide high-calorie finger foods.
- Monitor sleep, hydration, and activity.
- Administer medications as prescribed.
Suicide risk and safety
Suicide risk exists in both depression and bipolar disorder and may increase during energy improvement before mood improves.
High-risk indicators
- Expressed suicidal ideation or plan.
- Prior suicide attempts.
- Sudden calmness after depression.
- Giving away possessions.
- Severe agitation or insomnia.
- Substance use.
- Lack of social support.
Nursing interventions
- Ask directly about suicidal thoughts.
- Implement suicide precautions as indicated.
- Maintain close observation.
- Remove harmful objects.
- Involve interdisciplinary mental health teams.
- Document assessments objectively.
Medication considerations
While medication management is provider-directed, nurses play a crucial role in monitoring the effects and safety of medications.
Antidepressants
- May take several weeks for full effect.
- Monitor for increased suicidality early in treatment.
- Educate clients not to stop abruptly.
Mood stabilizers (e.g., lithium)
- Narrow therapeutic range.
- Therapeutic range: 0.6–1.2 mEq/L (higher end for acute mania, lower end for maintenance).
- Monitor serum levels.
- Ensure adequate hydration and sodium intake.
- Report tremors, diarrhea, vomiting, confusion, or ataxia.
- //////Caption: Recognition of lithium toxicity and appropriate nursing response.
- Illustration type: Medical infographic
- Illustration note: An infographic illustrating the progression from therapeutic lithium use to early and severe toxicity, highlighting tremors, nausea, vomiting, diarrhea, confusion, ataxia, slurred speech, seizures, and the importance of monitoring serum lithium levels, hydration, and sodium intake.///////
Antipsychotics (often used in mixed mania)
- Monitor for extrapyramidal symptoms.
- Assess metabolic side effects.
- Reinforce adherence.
Therapeutic communication strategies
- Use empathy and validation.
- Avoid minimizing feelings.
- Maintain calm, structured interactions.
- Set limits respectfully.
- Redirect impulsive behaviors.
- Reinforce reality gently when appropriate.
Clinical vignette: A 42-year-old client with bipolar disorder presents with rapid speech, minimal sleep, and grand plans to start multiple businesses overnight. The nurse lowers environmental stimuli, sets clear boundaries, offers frequent snacks, and administers prescribed medication. When the client becomes irritable, the nurse responds calmly and redirects without confrontation, prioritizing safety.