Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Major Depressive Disorder and Suicide Risk

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In one line

·Keep the person alive first, then fix the brain chemistry and the life problems that fed it.

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Normal physiology

·A healthy brain keeps mood stable by balancing serotonin (a messenger that steadies mood and sleep), norepinephrine (a messenger that powers energy and focus), and dopamine (a messenger that fuels motivation and reward). The prefrontal cortex (the front of the brain that plans and controls impulses) works with the hippocampus (the memory center) and keeps the amygdala (the alarm center) calm unless real danger appears.

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What goes wrong

·Chronic stress, genes, trauma, medical illness, or drug use damage the prefrontal cortex, hippocampus, and amygdala. Serotonin, norepinephrine, and dopamine drop too low. The prefrontal cortex weakens, so the person can't plan, can't see a future, and can't stop dark thoughts. The amygdala fires nonstop, flooding the person with fear and hopelessness. The hippocampus shrinks, so the person forgets that pain ever ended before. Cortisol stays high and poisons brain cells. The person feels crushed, sees no way out, and starts thinking suicide is the only solution.

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Hallmark signs

·Persistent sad, empty, or hopeless mood lasting most of the day, nearly every day for at least two weeks
·Loss of interest or pleasure in nearly all activities, even things the person used to love
·Significant weight change (loss or gain of more than 5% in a month) or change in appetite nearly every day
·Insomnia (trouble falling or staying asleep) or hypersomnia (sleeping too much) nearly every day
·Psychomotor agitation (restless, can't sit still) or retardation (moving and thinking in slow motion) nearly every day, noticeable to others
·Fatigue or loss of energy nearly every day
·Feelings of worthlessness or excessive, inappropriate guilt nearly every day
·Trouble thinking, concentrating, or making decisions nearly every day

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Red flags · escalate now

·Any mention of a suicide plan, especially if the person has access to firearms, large amounts of pills, or other lethal means
·Recent suicide attempt or self-harm, or a history of past attempts (each prior attempt raises future risk)
·Severe hopelessness, saying things like 'everyone would be better off without me' or 'there's no point in going on'
·Sudden calm or improvement after a long depression—sometimes means the person has decided on suicide and feels relief that the pain will end
·Giving away prized possessions, writing goodbye notes, or putting affairs in order

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Workup

·Urine drug screen (UDS)
·Complete metabolic panel (CMP)
·Thyroid-stimulating hormone (TSH)
·Complete blood count (CBC)
·Electrocardiogram (ECG)
·Vitamin B12 and folate levels

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Treatment

·Suicide risk assessment using C-SSRS; remove access to means (firearms, medications, poisons)
·Hospitalization if active plan plus intent plus access to means
·Start an SSRI (e.g. sertraline, escitalopram) or SNRI (e.g. venlafaxine, duloxetine)
·Psychotherapy (CBT or interpersonal therapy) plus daily phone contact in first 2 weeks
·ECT (electroconvulsive therapy) if depression is severe, treatment-resistant, or catatonic
·IV ketamine or intranasal esketamine for acute suicidal thoughts
·Coordinate housing, food security, substance-use treatment, sleep hygiene, and job support on the same treatment plan

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NCLEX trap

·No plan right now does NOT mean no risk. Major depressive disorder changes how the prefrontal cortex (the front part of the brain that makes thoughtful plans and pumps the brakes on impulses) works, so a plan can form in hours. You must remove guns, pills, and anything deadly from their reach AND put them somewhere safe—even if they say they have no plan today.
·Major depressive disorder needs both the medicine AND help fixing the real-life problems. An SSRI (a pill that slowly raises serotonin, the brain messenger that steadies mood) takes 4–6 weeks to work. In that gap, suicide risk is HIGH because the person still feels hopeless but now has a tiny bit more energy to act. Call them every few days, help fix housing or safety worries, and start therapy the same week you start the pill. Fix both the broken brain chemistry and the broken life—not just one.
·Long-term major depressive disorder does NOT mean low suicide risk. A new loss (like a spouse dying, a job ending, or a cancer diagnosis), a medicine change, or even stopping alcohol can flip the switch and suddenly make suicide feel like the only escape. Ask directly about thoughts of suicide at every single visit, no matter how many years they have been sick or how stable they seemed before.
·Some people with major depressive disorder fake happiness to hide their pain or to convince you they are fine so you will leave them alone and they can act on their plan. This sudden calm after weeks of despair can actually be a WARNING sign—they may have decided to die and feel relieved the suffering will end soon. Ask directly: 'Are you thinking about hurting yourself or ending your life?' even when the mood seems fine.
·With major depressive disorder and suicide risk, you must check for suicidal thoughts at every visit, every phone call, and whenever anything changes (new stress, new medicine, new side effect). Risk changes day to day, hour to hour. The first 2 weeks after starting an SSRI and the first 30 days after leaving the hospital are the highest-risk windows—the person may have slightly more energy before their mood lifts, giving them the ability to act on a plan they could not carry out before.
·A verbal promise or 'safety contract' is NOT a real safety plan for major depressive disorder with suicide risk. The broken brain—where the amygdala (the alarm center) is screaming and the prefrontal cortex (the part that weighs consequences and keeps impulses in check) is weak—cannot always keep a promise. They need a REAL plan: remove all guns, pills, ropes, and poisons from the home; have someone check on them in person every day; start medicine right away; and see a therapist within 24–48 hours. If none of these pieces fit together safely, they need to stay in the hospital until the brain heals enough to think clearly again.

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