Don’t miss: Bipolar disorder
Psychiatric
Normal grief response
Depressive disorders
Major depressive disorder
Adjustment disorder with depressed mood
Persistent depressive disorder (Dysthymia), for ≥ 2 years
Premenstrual dysphoric disorder
Substance/Medication induced depressive disorder
Depressive disorder due to another medical condition
Seasonal affective disorder
Postpartum depression
Disruptive mood dysregulation disorder (dx can only be made between 6 to 18 years of age)
Other depressive disorder.
Bipolar and related disorders
Bipolar disorder (I or II)
Cyclothymic disorder
Other Bipolar related disorder.
Anxiety disorder, eg, GAD, PTSD
Organic
Drug-induced, eg, Antiarrhythmics, Beta-blockers, reserpine, corticosteroids, oral contraceptives, clonidine, levodopa
Substance use disorder: Alcohol, sedative, or opiate abuse
Stimulant withdrawal, eg, cocaine, amphetamines
Thyroid disorder (hyper/hypo)
Cushing syndrome
Hypercalcemia
Diabetes
Dementia, parkinsonism
Neuro d/o: e.g. Multiple sclerosis
Other chronic medical illness, eg, anemia, chronic infection, renal failure
Infection (mono/flu/HIV/syphilis/Lyme)
B12/zinc deficiency
Cancer (classically pancreatic); Paraneoplastic syndrome
Post-surgical
Stroke
Domestic violence
Personality disorder, eg, borderline
Postconcussion syndrome
Thinking through the differential diagnosis
“Alcohol abuse can cause signs and symptoms of depression, anxiety, psychosis, and antisocial behavior, both during intoxication and during withdrawal.” NIH.gov
Further reading
https://pubs.niaaa.nih.gov/publications/arh26-2/90-98.htm (Last accessed in 12/2017)
J Med Life. 2009 Nov 15; 2(4): 440–442. Hyperthyroidism–cause of depression and psychosis: a case report.