Saunders' Pyramid to Success: Strategies for Answering Pharmacology Questions

Challenges and Scope of Pharmacology in Nursing

• Pharmacology is recognized as one of the most difficult nursing content areas to master because of two primary factors:     - The enormous number of medications available in the pharmaceutical market.     - The vast amount of information required to understand each specific medication.

• It is impossible to know every available medication; even professional nurses and university faculty refer to drug handbooks in clinical settings.

• While side effects and adverse effects are critical, the NCLEX pharmacology content area also encompasses:     - Medication administration procedures.     - Blood and blood products.     - Central venous access devices (CVADs).     - Dosage calculation.     - Intravenous (IV) therapies.     - Parenteral nutrition.     - Pain management.

• Most examination questions focus on familiar medications; however, when encountering unfamiliar drugs, students should employ educated guessing based on pharmacology strategies.

General Strategies for Pharmacology Questions

• Use a systematic approach to each question:     - Read the question carefully.     - Identify strategic words (e.g., "priority," "most appropriately," "is effective").     - Identify the subject of the question (e.g., intended effect vs. toxic effect).     - Use the process of elimination to narrow down options.     - Apply basic nursing knowledge and clinical experiences.     - Utilize specific pharmacology strategies, such as focusing on medication suffixes and prefixes.

Understanding Medication Effects: Intended, Side, Adverse, and Toxic

• Intended Effect: The desired and expected effect of a medication.     - Example: The intended effect of metoprolol (Toprol XL), an antihypertensive, is to lower blood pressure.

• Side Effect: A physiological effect of a medication that is unrelated to the intended effects.     - They are usually not life-threatening.     - Measures can often eliminate or alleviate discomfort.     - Example: A side effect of codeine sulfate is constipation. Nursing intervention: Instruct the client to drink fluids and eat a high-fiber diet.

• Adverse Effect: A more severe, always undesirable effect that can range from mild to severe (such as anaphylaxis).     - Example: An adverse effect of penicillin-type antibiotics is hypersensitivity.     - These must always be reported to the health care provider.

• Toxic Effect (Toxicity): Occurs when medication levels exceed the therapeutic level due to overdosing or medication accumulation.     - Identified by monitoring therapeutic blood levels.     - These must always be reported to the health care provider.

Specific Medications and Therapeutic Blood Levels

• Digoxin:     - Therapeutic blood level: $0.5$ to $2.0\,\text{ng/mL}$.     - Toxicity threshold: > 2.0\,\text{ng/mL}.     - Signs of toxicity: Gastrointestinal disturbances (anorexia, nausea, vomiting) and ocular disturbances (photophobia, light flashes, or halos around bright objects).

• Bronchodilators (e.g., Theophylline):     - Often end in the letters "-LINE".     - Therapeutic blood level: $10$ to $20\,\mu\text{g/mL}$.     - Early signs of toxicity: Restlessness and an increased pulse rate.

• Lithium (Mood stabilizer for bipolar disorder):     - Therapeutic blood level: $0.5$ to $1.3\,\text{mEq/L}$.     - Early signs of toxicity: Lethargy, hand tremors, and muscle weakness, followed by gastrointestinal disturbances.

• Phenytoin (Dilantin, anti-seizure medication):     - Therapeutic blood level: $10$ to $20\,\mu\text{g/mL}$.     - Early signs of toxicity: Muscular incoordination, nystagmus (involuntary eye movement), and diplopia (double vision).

Categorizing Medications by Classification and Terminology

• Medications in the same classification share similar actions, name commonalities, side effects, and nursing interventions.

• Strategy: Associate side effects directly with interventions (e.g., if the side effect is hypokalemia, the intervention is to monitor potassium levels and signs of deficiency).

• Common Medication Name Commonalities:     1. ACE (Angiotensin-Converting Enzyme) Inhibitors: End in "-PRIL" (e.g., enalapril); used for hypertension and heart failure.     2. Antilipemics: End in "-STATIN" (e.g., atorvastatin); used to lower cholesterol and triglycerides.     3. Antivirals: Contain "-VIR-" (e.g., ritonavir, indinavir); used for viral infections including HIV.     4. Benzodiazepines: Often end in "-PAM" (e.g., diazepam); used for anxiety, sedation, and seizures.     5. Beta Blockers: End in "-LOL" (e.g., atenolol); used for hypertension, angina, and dysrhythmias.     6. Calcium Channel Blockers: Often end in "-PINE" (e.g., amlodipine). Exceptions: diltiazem, verapamil. Used for hypertension and angina.     7. Glucocorticoids/Corticosteroids: End in "-SONE" (e.g., prednisone); used for inflammation and adrenal insufficiency.     8. Histamine H2 Receptor Antagonists: End in "-DINE" (e.g., cimetidine); used for heartburn and GERD.     9. Nitrates: Contain "-NITR-" (e.g., nitroglycerin); used for angina via vasodilation.     10. Proton Pump Inhibitors (PPIs): End in "-ZOLE" (e.g., lansoprazole, pantoprazole); used for ulcers and GERD by suppressing gastric acid.     11. Sulfonamides: Contain "-SULF-" (e.g., sulfasalazine); used as antibacterials.     12. Thiazide Diuretics: End in "-ZIDE" (e.g., hydrochlorothiazide); used for hypertension and edema.     13. Thrombolytics: End in "-ASE" (e.g., alteplase); used to dissolve blood clots.     14. Thyroid Hormones: Contain "-THY-" (e.g., levothyroxine); used for replacement therapy in hypothyroidism.     15. Bronchodilators: End in "-LINE" (e.g., theophylline); used for asthma and COPD.

Top 10 General Guidelines for Medication Administration

1. Age Factors: The neonate, infant, and older client are at the highest risk for toxicity due to affected metabolism and excretion.

2. Pregnancy: Many medications are contraindicated during pregnancy and breastfeeding.

3. Interactions: Antacids and grapefruit juice are usually not administered with medications as they interfere with absorption.

4. Do Not Crush: Enteric-coated and sustained-release tablets must not be crushed; capsules must not be opened.

5. Assessment First: Nursing interventions prioritize monitoring for effects; options containing "assessment" are frequently correct.

6. Client Education: Ensure the client knows how to take the drug, identify side effects, monitor their own vital signs (temp, pulse, BP), and the importance of compliance.

7. No Adjustments: Neither the nurse nor the client should ever change a dose or stop a medication abruptly. A nurse can withhold a dose for safety but cannot discontinue a prescription.

8. OTC/Herbal Awareness: Clients must avoid over-the-counter (OTC) drugs or herbal preparations unless approved by the healthcare provider.

9. Lifestyle Avoidance: Consumption of alcohol and smoking should be avoided (NCLEX standard is "no alcohol, no smoking").

10. Medic Alert Bracelets: Required for clients on anticoagulants, hypoglycemics, insulin, cardiac meds, corticosteroids, anti-myasthenics, anticonvulsants, and MAOIs.

Questions & Discussion

• Question 1: Metoprolol is prescribed. The nurse monitors for which intended effect?     - Response: Decreased blood pressure.     - Strategy: Metoprolol ends in "-LOL," identifying it as a beta-blocker/antihypertensive.

• Question 2: Azithromycin side effect education.     - Response: Abdominal cramping.     - Strategy: "-MYCIN" indicates an antibiotic; antibiotics commonly cause GI side effects. Eliminate "yellow skin/eyes" as they are comparable (jaundice/hepatitis) and indicate adverse effects, not simple side effects. Eliminate "severe diarrhea" because "severe" implies an adverse effect.

• Question 3: Pantoprazole effectiveness assessment.     - Response: Relief of heartburn.     - Strategy: "-ZOLE" identifies a PPI, which decreases stomach acid.

• Question 4: Client takes Indinavir; what does the nurse suspect?     - Response: Human Immunodeficiency Virus (HIV).     - Strategy: "-VIR" identifies an antiviral. Eliminate other options (diverticulitis, ulcer, bowel disease) as they are all GI-related and thus comparable.

• Question 5: Priority action before administering sulfamethoxazole/trimethoprim for a UTI.     - Response: Ask the client about an allergy to sulfonamides.     - Strategy: Assessment (asking about allergy) comes before implementation. The name "SULF-" matches the classification "sulfonamides."

• Question 6: Client reports upset stomach when taking an antibiotic.     - Response: Take the medication with food.     - Strategy: Eliminate taking with an antacid (affects absorption) or stopping the medication (nurse cannot discontinue). Taking with food is the most appropriate nursing advice for GI upset.