An 82-year-old woman comes to the physician because of difficulty sleeping and increasing fatigue. Over the past 3 months she has been waking up early and having trouble falling asleep at night. During this period, she has had a decreased appetite and a 3.2-kg (7-lb) weight loss. Since the death of her husband one year ago, she has been living with her son and his wife. She is worried and feels guilty because she does not want to impose on them. She has stopped going to meetings at the senior center because she does not enjoy them anymore and also because she feels uncomfortable asking her son to give her a ride, especially since her son has had a great deal of stress lately. She is 155 cm (5 ft 1 in) tall and weighs 51 kg (110 lb); BMI is 21 kg/m2. Vital signs are within normal limits. Physical examination shows no abnormalities. On mental status examination, she is tired and has a flattened affect. Cognition is intact. Which of the following is the most appropriate initial step in management?

Begin cognitive-behavioral therapy

Notify adult protective services

Recommend relocation to a nursing home

A 59-year-old woman comes to the emergency department because of a 2-day history of worsening fever, chills, malaise, productive cough, and difficulty breathing. Three days ago, she returned from a trip to South Africa. She has type 2 diabetes mellitus, hypertension, and varicose veins. Her current medications include metformin, lisinopril, and atorvastatin. Her temperature is 39.4°C (102.9°F), pulse is 102/minute, blood pressure is 94/68 mm Hg, and respirations are 31/minute. Pulse oximetry on 2 L of oxygen via nasal cannula shows an oxygen saturation of 91%. Examination reveals decreased breath sounds and dull percussion over the left lung base. The skin is very warm and well-perfused. The remainder of the examination shows no abnormalities. Laboratory studies show: Hemoglobin 11.6 g/dL Leukocyte count 15,400/mm3 platelet count 282,000/mm3 Serum Na+ 144 mEq/L Cl- 104 mEq/L K+ 4.9 mEq/L Creatinine 1.5 mg/dL Blood and urine for cultures are obtained. Intravenous fluid resuscitation is begun. Which of the following is the next best step in management?

Intravenous ceftriaxone and azithromycin

External cooling and intravenous acetaminophen

Intravenous vancomycin and ceftriaxone

A 71-year-old man develops worsening chest pressure while shoveling snow in the morning. He tells his wife that he has a squeezing pain that is radiating to his jaw and left arm. His wife calls for an ambulance. On the way, he received chewable aspirin and 3 doses of sublingual nitroglycerin with little relief of pain. He has borderline diabetes and essential hypertension. He has smoked 15–20 cigarettes daily for the past 37 years. His blood pressure is 172/91 mm Hg, the heart rate is 111/min and the temperature is 36.7°C (98.0°F). On physical examination in the emergency department, he looks pale, very anxious and diaphoretic. His ECG is shown in the image. Troponin levels are elevated. Which of the following is the best next step in the management of this patient condition?

Clopidogrel, atenolol, anticoagulation and monitoring

CT scan of the chest with contrast

A 52-year-old unconscious man is brought to the emergency department. He was found unresponsive on the sidewalk in the snow. He is recognized by the staff as a local homeless man and IV drug user. Rapid warming procedures are initiated. At physical examination, he is dirty and disheveled and unrousable with a blood pressure of 100/76 mm Hg and a temperature of 37.2°C (99°F). He is thin with apparent weight loss. Both arms have indications of recent IV injection stigmata. A head MRI reveals multiple hyperintense signals in the meninges with multiple tiny contrast-enhancing lesions in the cerebellum and cerebral cortex. A chest X-ray is within normal limits. Mild dilatation of the ventricles is also appreciated. Cerebrospinal fluid (CSF) analysis reveals: CSF opening pressure 25 cm H20 CSF total leukocyte count 580/mm3 Lymphocytes 90% Neutrophils 10% CSF protein 176 mg/dL CSF glucose 21 mg/dL A specimen stains are positive for acid-fast bacilli. CSF culture is pending. Appropriate antibacterial medication is initiated. Which of the following is true regarding the immediate future management of this patient?

Treatment should only be started after CSF culture results

Verify response to antibiotic therapy

Acyclovir should be started empirically as well

A 53-year-old woman with type 2 diabetes mellitus is admitted for evaluation of recurrent episodes of nausea, tremors, and excessive sweating. She works as a nurse and reports self-measured blood glucose levels below 50 mg/dL on several occasions. Her family history is positive for borderline personality disorder. The only medication listed in her history is metformin. Which of the following is the most appropriate next step in management?

Ask the patient if she is taking any medications other than metformin

Measure serum C-peptide concentration

Search the patient's belongings for insulin

Measure glycated hemoglobin concentration

Report the patient to her employer

A previously healthy 5-year-old boy is brought to the emergency department because of a 1-day history of high fever. His temperature prior to arrival was 40.0°C (104°F). There is no family history of serious illness. Development has been appropriate for his age. He is administered rectal acetaminophen. While in the waiting room, he becomes unresponsive and starts jerking his arms and legs back and forth. A fingerstick blood glucose concentration is 86 mg/dL. After 5 minutes, he continues having jerky movements and is unresponsive to verbal and painful stimuli. Which of the following is the most appropriate next step in management?

Intravenous administration of lorazepam

Intravenous administration of phenobarbital

Intravenous administration of valproate

Intravenous administration of fosphenytoin

Medication prioritization for USMLE Step 2 CK: High-Yield CCS Cases Lessons

Prioritization Framework - The First-Dose Decision

In critical scenarios, the first medication can be life-saving. The choice is guided by a rapid assessment of stability and the immediate threat to life. The goal is to deliver the most effective agent via the fastest route.

Core Principle: Address the most immediate physiological threat first (e.g., hypotension, hypoxia, hypoglycemia).
Route Dictates Onset:
- IV/IO: Fastest onset (<1 min), for emergencies.
- IM/SL: Slower (minutes), if no IV access.
- Oral: Slowest onset (>30 min), for stable patients.
📌 Mnemonic: "IV is KING" in codes. Prioritize Intravenous access for rapid drug delivery.

⭐ High-Yield Pearl: In cardiac arrest, IV/IO adrenaline (1mg) is a cornerstone intervention, given every 3-5 minutes. Its primary benefit is vasoconstriction (alpha-1 effect), increasing coronary and cerebral perfusion pressure.

Drug Plasma Concentration by Administration Route

Acute Scenarios - Code Red Cocktails

In time-sensitive emergencies ("Code Red"), pre-defined medication cocktails ensure rapid, life-saving intervention. Focus is on immediate stabilization.

Status Epilepticus (SE):
- Immediate: IV Benzodiazepine. Lorazepam (4mg IV) is preferred due to longer action.
- Urgent: Load with anti-epileptic drugs like Phenytoin or Fosphenytoin.
Acute Coronary Syndrome (ACS):
- Initial Meds: Aspirin (325mg, chewed) + Clopidogrel (300-600mg).
- Symptom Control: Nitroglycerin (SL), Morphine for severe pain.
- Oxygen: Only if SpO2 < 90%.
- 📌 Mnemonic: While MONA is classic, THROMBINS2 is more comprehensive for ACS management.
Anaphylactic Shock:
- First Line: Adrenaline (Epinephrine) 0.5mg IM (1:1000 solution). Repeat every 5-15 mins.
- Adjuncts: IV fluids, Corticosteroids (Hydrocortisone), H1/H2 blockers (Diphenhydramine, Ranitidine).
Coma Cocktail (Altered Sensorium):
- Consider Dextrose, Oxygen, Naloxone, Thiamine (DONT).
- Naloxone (0.4-2mg IV) for suspected opioid overdose.
- Thiamine before glucose in alcoholics to prevent Wernicke's encephalopathy.

⭐ The single most crucial, life-saving intervention in anaphylaxis is Intramuscular (IM) Adrenaline. All other medications like steroids and antihistamines are secondary and do not provide immediate relief from airway obstruction or hypotension.

Chronic & Special Cases - The Polypharmacy Puzzle

Goal: Reduce inappropriate polypharmacy to ↓ adverse drug events (ADEs), especially in the elderly.
Key Tools for Deprescribing:
- Beers Criteria: Identifies potentially inappropriate medications (PIMs) for patients >65 years.
- STOPP/STARTT Criteria:
  - STOPP: Screening Tool of Older People's Prescriptions (identifies PIMs).
  - STARTT: Screening Tool to Alert to Right Treatment (identifies omissions).

Beers and STOPP Criteria for Medication Prioritization

⭐ High-Yield: In the elderly, drugs with narrow therapeutic indices (Digoxin, Warfarin) and anticholinergic properties are most frequently associated with preventable ADEs.

High‑Yield Points - ⚡ Biggest Takeaways

ABCDE first: Always stabilize the patient before giving any medication.

Prioritize life-saving drugs for critical conditions like MI, anaphylaxis, or hypoglycemia.

In emergencies, the IV route is preferred for the fastest onset of action.

For suspected sepsis, administer broad-spectrum antibiotics immediately after drawing blood cultures.

Administer specific antidotes in poisoning cases without delay.

Always check for patient allergies and contraindications before administration.

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