ATI CMS Pharmacology Original Exam Mastery 2026

ATI CMS Pharmacology Original Exam Mastery 2026 Study Strategy 1. Study by prototype. For each medication class, know one prototype, its mechanism, major indication, dangerous adverse effect, contraindications/interactions, monitoring, and teaching. 2. Separate expected effects from red flags. Mild drowsiness may require teaching; airway swelling, severe bleeding, profound hypoglycemia, or respiratory depression requires immediate action. 3. Make the medication-lab connection. Link the drug to the laboratory value it can change: potassium with diuretics and digoxin risk, INR with warfarin, renal function with renally cleared/nephrotoxic drugs, glucose with insulin and corticosteroids, and CBC/ANC with selected therapies. 4. Use clinical judgment. On FIRST/priority questions, identify the most immediate physiologic threat before choosing routine teaching, documentation, or comfort measures. 5. Calculate with units. Keep units visible through every step and verify whether the final answer should be tablets, mL, mg, units, or mL/hr. High-Yield Medication Connections Medication/class Furosemide / loop diuretic Digoxin ACE inhibitors Warfarin Opioids Insulin Levothyroxine Corticosteroids High-yield nursing connection Monitor volume status, blood pressure, renal function, and potassium; watch for dehydration and electrolyte loss. Assess apical pulse; monitor renal function and electrolytes; toxicity can include GI, visual, and rhythm changes. Monitor blood pressure, renal function, and potassium; angioedema is an emergency. Monitor INR and bleeding; review interactions and missed-dose instructions. Prioritize respiratory rate, depth, sedation, and airway; naloxone may be required for toxicity. Know onset/peak patterns by formulation, meal timing, hypoglycemia recognition, and safe administration. Take consistently, usually on an empty stomach; separate interacting products such as calcium/iron. Monitor glucose, infection risk, blood pressure, and long-term complications; taper after prolonged therapy as directed. ATI9. The prescription is 500 mg. Tablets contain 250 mg each. How many tablets should the nurse administer? Answer: 2 tablets Rationale: Use dose desired ÷ dose available: 500 mg ÷ 250 mg/tablet = 2 tablets. 10. An infusion contains 1,000 mL and must run over 8 hours. What is the hourly rate? Answer: 125 mL/hr Rationale: 1,000 mL ÷ 8 hr = 125 mL/hr. 11. A medication is prescribed at 4 mg/kg for a client weighing 70 kg. What dose is required? Answer: 280 mg Rationale: Multiply the ordered dose by weight: 4 mg/kg × 70 kg = 280 mg. 12. A liquid contains 100 mg in 5 mL. The prescribed dose is 60 mg. How many mL should be given? Answer: 3 mL Rationale: Set up 60 mg × 5 mL ÷ 100 mg = 3 mL. Population Considerations 13. Why can older adults be more sensitive to many medications? Answer: Age-related changes in renal and hepatic function can alter drug clearance. Rationale: Reduced renal filtration and changes in hepatic metabolism can increase exposure to some medications. Polypharmacy also increases interaction and adverse-event risk. 14. Which assessment is especially important before giving a renally cleared medication to an older adult? Answer: Recent renal function and medication history Rationale: Renal impairment can reduce clearance and increase drug accumulation. Medication review also helps identify duplicate therapies and interactions. 15. A nurse is teaching a child about an oral medication. Which approach is best? Answer: Use age-appropriate language and involve the caregiver in administration teaching. Rationale: Children benefit from simple explanations and developmentally appropriate communication. Caregivers need clear instructions for dosing, storage, and adverse effects. 16. Which factor can significantly alter medication dosing during pregnancy? Answer: Changes in maternal physiology and potential