CPR APPLICATIONS FOUNDATION · CHAPTER 17 · TREATMENT
Treatment Foundations of Psychiatry & Behavioral Science
Organize the chapter before drilling into individual CPR concepts.
Supplemental foundation map: this page orients the detailed CPR Applications for Chapter 17. It is not part of the canonical CPR object inventory.
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Normal Foundations
Abnormal Foundations
Treatment Foundations · You are here
17.20 · SOURCE CPR FOUNDATION
Concept
Psychiatric treatment questions are decision-logic questions disguised as pharmacology, therapy, or safety questions. Step 1 often asks whether the treatment matches the symptom pattern, whether the medication is safe for the patient, or whether immediate risk overrides routine outpatient care. The core chain is mechanism → risk → next step.
Pattern
Step 1 tests antidepressants, antipsychotics, mood stabilizers, therapy modalities, suicide risk, involuntary hold criteria, capacity, confidentiality exceptions, and substance treatment. The safest immediate response often matters more than the ideal long-term plan.
Rule
- Match treatment to syndrome and risk. Medication, therapy, safety intervention, or reporting each has a different indication.
- Recognize adverse effects by mechanism. Receptor and organ-system toxicities often identify the drug.
- If acute safety is present, protect first. Suicide risk, violence risk, grave disability, abuse, and delirium require action.
Applications
- SSRI plus linezolid hyperreflexia → serotonin syndrome
- Antipsychotic fever rigidity CK elevation → NMS
- Lithium polyuria tremor creatinine rise → toxicity concern
- Suicidal ideation plan firearm → safety intervention
- Reasonable suspicion of child abuse → follow applicable reporting laws and institutional safeguarding protocols; thresholds and processes vary by jurisdiction
- Credible threat of serious harm toward an identifiable person → urgently assess safety and applicable jurisdiction-specific duties to protect, warn, or report
- Tip: Safety overrides routine outpatient nuance
CPR APPLICATIONS · ACTIVE REASONING
Infer treatment toxicity from the affected pathway
Separate therapeutic target from toxicity. Identify the recent drug change, the neuromuscular pattern, and any organ-dependent clearance before choosing the mechanism. Select a response before checking the explanation. If scripting is unavailable, expand a worked answer. Responses are not stored or transmitted.
Reveal worked answer and transfer
Best answer: Serotonin syndrome related to serotonergic excess. Linezolid has monoamine oxidase-inhibiting properties, and clonus with hyperreflexia after serotonergic exposure supports serotonin syndrome.
Change one variable: How would lead-pipe rigidity after a dopamine-blocking drug change the differential?
Reveal worked answer and transfer
Best answer: Neuroleptic malignant syndrome associated with dopamine antagonism. NMS is associated with dopamine blockade and a characteristic severe rigidity/hyperthermia syndrome.
Change one variable: How do clonus and hyperreflexia after a serotonergic medication distinguish a competing diagnosis?
Reveal worked answer and transfer
Best answer: Reduced renal lithium clearance and increased toxicity risk. Thiazide-associated sodium handling changes and volume depletion can increase lithium reabsorption and serum exposure.
Change one variable: Which findings and laboratory measurements are relevant if tremor, ataxia, or confusion develops?
Change the mechanism
Review the comparison without scripts
- Serotonergic agent interaction with clonus: Consider serotonin toxicity and urgent evaluation of interacting medications.
- Dopamine antagonist with high fever and rigidity: Consider neuroleptic malignant syndrome requiring urgent medical assessment.
- Lithium plus dehydration or thiazide: Toxicity risk increases; renal function and lithium level require evaluation.
Explain it back: For one decision, state the mechanism, a specific counterexample, and the finding that would change your conclusion.
Unscored educational practice; not psychometrically validated and not patient-specific medical advice.
How to use this foundation map
- Identify the organizing mechanism.
- Recognize the pattern.
- Restate the rule without looking.
- Test transfer with applications and question practice.
Pair CPR with the 5P Approach™ when solving cases and questions.