Histamine H1 blockade contributes to sedation and depression benefit
Active metabolite norquetiapine inhibits norepinephrine reuptake
Lurasidone
D2 and 5-HT2A antagonism with 5-HT7 antagonism
5-HT7 antagonism contributes to antidepressant effect
High 5-HT1A partial agonism adds anxiolytic benefit
Chronobiologic considerations
Circadian rhythm disruption as core mechanism
Social rhythm regularization as therapeutic target
Sleep deprivation can precipitate mania
Seasonal patterns
Depressive episodes more common in winter in some patients
Light therapy adjunct in seasonal pattern bipolar depression (with caution for switch risk)
Rapid cycling treatment complexity
Antidepressant avoidance
Thyroid optimization may help
Valproate or clozapine for refractory rapid cycling
Patient Discharge Instructions
copy discharge instructions
Bipolar depression home care
Take all medications exactly as prescribed
Do not stop mood stabilizers or antipsychotics without speaking to your doctor
Stopping lithium suddenly can trigger a manic episode
Take lurasidone with a full meal (at least 350 calories) for it to work properly
Absorption is significantly reduced without food
Keep a regular sleep schedule
Go to bed and wake at the same time each day
Sleep disruption can trigger mood episodes
Avoid alcohol and recreational drugs
Alcohol worsens bipolar depression and can interact with medications
Cannabis worsens mood cycling
Safety planning
Crisis line and resources
988 Suicide and Crisis Lifeline: call or text 988 (Canada/US)
Local emergency department if feeling unsafe
Lethal means safety
Remove or secure firearms at home
Store all medications in a locked location
Have a trusted person check in regularly
Mood tracking
Daily mood log or app to detect early warning signs
Share mood records with your psychiatrist or family doctor
Warning signs to return to emergency department
Thoughts of suicide with a plan or intent to act
Go to the nearest emergency department immediately
Call 911 or have someone drive you
Hearing voices or seeing things that others do not
New or worsening psychotic symptoms
Unable to sleep for 2 or more nights in a row
Reduced sleep can signal an oncoming manic episode
Feeling very speeded up, grandiose, or impulsive
Signs of mania or mixed episode requiring urgent reassessment
Signs of lithium toxicity if taking lithium
Severe tremor, vomiting, confusion, unsteady walking
Stop lithium and go to emergency department
Severe rash, especially with blistering if taking lamotrigine
Stop lamotrigine and seek emergency care immediately
Follow-up
Psychiatry appointment within 1-7 days of discharge
Confirm appointment before leaving hospital
Contact clinic if appointment not available within 1 week
Family doctor within 2-4 weeks
Bloodwork monitoring for medications
Physical health and metabolic monitoring
Bring medication list and discharge papers to all appointments
Include doses and start dates
Note any side effects experienced
References
Guidelines and key sources
Clinical guidelines
VA/DoD Clinical Practice Guideline for Management of Bipolar Disorder (2023)
First-line recommendations for bipolar depression pharmacotherapy
Lurasidone and quetiapine as preferred agents
Canadian Network for Mood and Anxiety Treatments (CANMAT) and ISBD 2018 Guidelines
Evidence hierarchy for bipolar depression treatments
Lithium anti-suicidal recommendation
American Psychiatric Association Practice Guideline for Bipolar Disorder
Comprehensive diagnostic and treatment framework
Monitoring recommendations for mood stabilizers
Key evidence sources
Calabrese JR et al — quetiapine vs placebo in bipolar I and II depression
Established quetiapine as FDA-approved first-line agent
Loebel A et al — lurasidone in bipolar depression (PREVAIL program)
Monotherapy and adjunctive efficacy confirmed
Tohen M et al — olanzapine-fluoxetine combination in bipolar depression
Highest response rate but significant metabolic burden
Sachs GS et al — STEP-BD: antidepressant use in bipolar depression
Antidepressants not superior to placebo when added to mood stabilizers
Supported caution with antidepressant use in bipolar disorder
Coding standards
ICD-10 F31.3 to F31.5: Bipolar affective disorder, current episode depressed
F31.31 mild, F31.32 moderate, F31.4 severe without psychosis, F31.5 severe with psychosis
ICD-10 F31.81: Bipolar II disorder
SNOMED CT concept: Bipolar affective disorder, current episode depression
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.