Updated for 2026
NCLEX-PN pharmacology: medication safety and administration within LPN/LVN scope
Pharmacology accounts for approximately 11–17% of NCLEX-PN content. LPN/LVN practice centres on safe medication administration, adverse effect recognition, and patient teaching — all within the supervised scope defined by state practice acts. NCLEX-PN tests knowledge of what the LPN/LVN can administer, monitor, and teach.
Educational purpose: This content is for exam preparation and professional development only. It is not intended for clinical decision-making. Always follow current guidelines, institutional policies, and scope of practice.
LPN/LVN medication administration scope
The LPN/LVN administers medications under the supervision of the RN or provider. Scope varies by state, but NCLEX-PN generally tests knowledge within a common scope framework.
Generally within LPN/LVN scope: Oral medications, topical medications, subcutaneous and intramuscular injections, routine IV medications through established IV access (in many states after additional competency verification — not push medications), enteral medications via established nasogastric or gastrostomy tube, ophthalmic and otic medications, inhalation medications.
Generally outside LPN/LVN scope: Starting IV lines de novo (in many states), blood and blood product administration (RN responsibility), initial medication assessment and care planning, adjusting medication doses without explicit protocol, managing patient-controlled analgesia (PCA) pump programming.
NCLEX-PN medication safety framework: Same six rights apply. LPN/LVN must know when to hold a medication (digoxin: hold if apical pulse <60 bpm; antihypertensives: hold for low BP; opioids: hold if RR <12), report adverse effects, and document administration accurately.
High-alert medications in LPN/LVN practice
High-alert medications require special precautions regardless of who administers them. LPN/LVN must know the same safety monitoring parameters as RNs.
Insulin: Correct type, dose, route. Pre-meal blood glucose check. Know signs of hypoglycaemia (shakiness, diaphoresis, confusion, tachycardia). Have juice, glucose tablets, or D50W available. Never administer insulin without a glucose check.
Digoxin: Assess apical pulse for 60 seconds before each dose. Hold and report if <60 bpm or arrhythmia noted. Know toxicity signs: nausea, vomiting, bradycardia, visual disturbances. Monitor K+ levels — hypokalemia increases toxicity risk.
Anticoagulants: Check most recent lab values (INR for warfarin, aPTT for heparin) before administration. Assess for bleeding signs. Educate patient on bleeding precautions. Know antidotes: vitamin K for warfarin, protamine sulfate for heparin.
Opioid analgesics: Check RR before administration. Hold and notify if RR <12/min or if excessive sedation noted. Have naloxone available. Constipation is expected — assess bowel function and anticipate bowel regimen.
Patient teaching for common medications
Patient education is a key LPN/LVN responsibility under RN supervision and delegation. NCLEX-PN tests knowledge of what to teach for high-frequency medications.
ACE inhibitors (lisinopril, enalapril): Dry cough is a common side effect. Report signs of angioedema (facial/lip/tongue swelling — discontinue immediately). Avoid potassium supplements without guidance. First-dose hypotension — change positions slowly.
Metformin: Take with meals to reduce GI side effects. Hold 48 hours before and after IV contrast procedures (risk of lactic acidosis). Monitor renal function. Signs of lactic acidosis: muscle pain, weakness, breathing difficulty, stomach discomfort — report immediately.
Thyroid replacement (levothyroxine): Take on empty stomach 30–60 minutes before breakfast. Do not take with calcium, iron supplements, or antacids (reduce absorption). Do not skip doses. Signs of under-replacement: fatigue, weight gain, constipation. Signs of over-replacement: tachycardia, heat intolerance, weight loss.
Frequently asked questions
- What medication-related tasks can LPN/LVN perform vs. what requires RN delegation?
- The LPN/LVN can administer medications within established protocols, monitor for expected effects and adverse effects, and provide patient education about medications (under RN supervision). However, the initial medication reconciliation (assessment), development of the medication-related care plan, and clinical judgment decisions about whether a medication is appropriate for the patient's current condition belong to the RN. If a patient reports a new allergy or adverse symptom that was not previously documented, the LPN/LVN must report to the RN who then makes the clinical judgment about whether to hold the medication and notify the provider.
- When should the LPN/LVN hold a scheduled medication and notify the provider?
- Hold and notify when: (1) Vital sign threshold is outside acceptable range — pulse <60 for digoxin, systolic BP <90 for antihypertensives/diuretics, RR <12 for opioids. (2) Critical lab value received — INR >supratherapeutic range for warfarin, serum digoxin >2 ng/mL, potassium outside 3.5–5.0 for diuretics or digoxin. (3) Patient reports a new adverse effect suggesting toxicity — nausea/vision changes with digoxin, unexplained muscle pain with statins, signs of bleeding with anticoagulants. (4) Drug contraindicated by current clinical condition — holding an antihypertensive before dialysis per protocol. Always document the held medication, reason for holding, and provider notification.
Clinically reviewed by NurseNest Clinical Review Team · Last updated 2026-06-10 · For educational purposes only · Review policy