Learn: Pharmacological and Parenteral Therapies - Part 2

Concept-focused guide for Pharmacological and Parenteral Therapies - Part 2 (no answers revealed).

~7 min read

Learn: Pharmacological and Parenteral Therapies - Part 2
Explore more for “nclex-rn”:

Overview

Welcome! In this session, we’ll break down essential concepts in pharmacological and parenteral therapy, all through the lens of real-world nursing scenarios. You’ll learn how to keep medications safe and controlled, manage high-risk drugs, respond to emergencies like adverse drug reactions or air embolisms, and educate patients on safe medication use and disposal. By mastering these principles, you’ll be equipped to deliver safer, more effective care and confidently answer medication-related NCLEX-style questions.


Concept-by-Concept Deep Dive

1. Medication Reconciliation and Transitions of Care

What it is:
Medication reconciliation is a systematic process ensuring that patients’ medication lists are accurate and complete at every transition in care—admission, transfer, and discharge. It aims to prevent errors such as omissions, duplications, or harmful drug interactions.

Components:

  • Comparing Med Lists: Cross-reference patient’s home medications, current orders, and what’s actually being administered.
  • Identifying Discrepancies: Watch for duplications, omissions, or drugs with similar effects.
  • Addressing Supplements and OTCs: Herbal supplements and over-the-counter (OTC) drugs can interact with prescribed medications, especially around surgery or in polypharmacy.

Step-by-Step:

  1. Obtain a complete list from the patient or caregiver, including all prescribed, OTC, and herbal products.
  2. Compare this list with the provider’s orders.
  3. Clarify any discrepancies with the prescriber and update records.

Common Misconceptions:

  • Assuming herbal supplements are “safe” and don’t need to be documented.
  • Overlooking changes made during hospitalization when preparing discharge instructions.

2. High-Alert Medications and Monitoring

What it is:
High-alert medications are drugs with a heightened risk of causing significant harm if used in error. Examples include anticoagulants (like warfarin), chemotherapeutics, lithium, digoxin, and insulin.

Key Subtopics:

a) Laboratory Monitoring

  • Anticoagulants: INR for warfarin (therapeutic range is critical).
  • Electrolyte-sensitive Drugs: Lithium (affected by sodium levels), digoxin (potassium-sensitive).

b) Dietary Interactions

  • Warfarin: Vitamin K intake can alter drug effectiveness.
  • Lithium: Sodium intake fluctuations can change blood levels.

Step-by-Step Recipe:

  1. Review the latest lab results before administering the drug.
  2. Assess for any dietary or supplement changes.
  3. Educate patients on consistency in diet and the importance of scheduled labs.

Common Misconceptions:

  • Believing all leafy greens must be avoided on warfarin (consistency is key, not total avoidance).
  • Not recognizing signs of overdose or toxicity (e.g., bleeding for warfarin, confusion for lithium).

3. Parenteral Therapies and IV Safety

What it is:
Parenteral therapy involves administering drugs via injection, infusion, or other non-oral routes. IV chemotherapy, vesicant drugs, and central lines require special precautions.

Key Subtopics:

a) Central Venous Catheter (CVC) Care

  • Proper needle selection (e.g., non-coring Huber needle for implanted ports).
  • Recognizing and responding to complications: air embolism, infection, exudate.

b) Vesicant Administration

  • Vesicants can cause tissue necrosis if extravasation occurs (drug leaks into surrounding tissue).
  • Monitor closely for burning, swelling, or redness during infusion.

Step-by-Step Recipe:

  1. Confirm IV patency and site integrity before administration.
  2. Use the correct equipment and follow protocols for high-risk drugs.
  3. Respond immediately to any adverse symptoms at the site.

Common Misconceptions:

  • Underestimating the risk of giving vesicants through peripheral lines.
  • Ignoring minor patient complaints of discomfort during infusion.

4. Safe Medication and Sharps Disposal

What it is:
Proper disposal of medications and sharps (needles) prevents accidental injury, environmental harm, and drug misuse.

Key Subtopics:

a) Sharps Disposal

  • Use FDA-cleared sharps containers or heavy-duty household containers (e.g., a puncture-proof, leak-resistant plastic container with a tight lid).

b) Medication Disposal

  • Opioids and Patches: Follow FDA guidance—some may be flushed; others should go to take-back programs or be disposed of in household trash after proper steps.
  • Chemotherapeutics: Handle and dispose of according to facility protocol to avoid exposure.

Step-by-Step Recipe:

  1. For sharps, place immediately in a proper container—never in loose trash or recycling.
  2. For unused drugs, check local/federal guidelines for take-back events, disposal instructions, or safe household disposal.
  3. For patches, fold sticky sides together before disposal as instructed.

Common Misconceptions:

  • Flushing all medications is NOT universally safe or recommended.
  • Household recycling bins are not appropriate for sharps disposal.

5. Emergency Recognition and First Responses

What it is:
Quickly recognizing and responding to adverse events, such as transfusion reactions, air embolisms, or medication extravasation, is essential to patient safety.

Key Subtopics:

a) Transfusion Reactions

  • Symptoms: shortness of breath, back pain, anxiety.
  • First action: Stop the infusion immediately, then follow institutional protocols.

b) Air Embolism

  • Sudden chest pain, dyspnea with central line use.
  • Position patient to trap air (e.g., left lateral Trendelenburg), call for help.

c) Adverse Reactions to Parenteral Medications

  • Stop the medication, assess the patient, and notify the provider.

Step-by-Step Recipe:

  1. Recognize urgent symptoms.
  2. Stop the causative agent (infusion or injection).
  3. Secure patient safety: position, oxygen, call for help as appropriate.

Common Misconceptions:

  • Attempting to “wait and see” when a reaction is suspected.
  • Not knowing the correct patient positioning for air embolism management.

Worked Examples (generic)

Example 1: Medication Reconciliation

A patient is admitted for surgery. The nurse reviews the medication list and notices the patient takes a prescription anticoagulant and herbal supplements at home. The nurse cross-references the pre-op orders and identifies that the herbal supplement is not listed. The nurse contacts the provider to clarify whether the supplement should be discontinued before surgery, as some herbs can affect bleeding risk.

Example 2: High-Alert Drug Monitoring

A patient on lithium asks about dietary sodium. The nurse explains that sudden increases or decreases in salt intake can alter lithium levels and that they should keep their sodium consumption consistent to avoid toxicity or subtherapeutic levels.

Example 3: Parenteral Therapy Complication

A client receiving a vesicant chemotherapy drug reports burning at the IV site. The nurse immediately stops the infusion, assesses the site for extravasation, and follows the protocol for handling vesicant infiltration, which may include antidote administration and cold or warm compresses.

Example 4: Safe Disposal

A patient uses insulin pens at home. The nurse educates the patient to place used needles in a thick, puncture-resistant plastic container with a tight lid, label it appropriately, and follow community guidelines for disposal—never in household trash or recycling bins.


Common Pitfalls and Fixes

  • Pitfall: Overlooking herbal or OTC drugs during reconciliation. Fix: Always ask specifically about supplements and non-prescription drugs.
  • Pitfall: Assuming all patients on warfarin should avoid leafy greens. Fix: Teach consistency, not avoidance, in vitamin K intake.
  • Pitfall: Ignoring minor IV site complaints during vesicant infusions. Fix: Take all reports seriously; stop infusion to assess.
  • Pitfall: Using regular needles for implanted ports. Fix: Use only approved non-coring (Huber) needles for port access.
  • Pitfall: Improper sharps or medication disposal. Fix: Educate on FDA-recommended containers and local guidelines.
  • Pitfall: Delaying action in emergencies (e.g., transfusion reactions, air embolism). Fix: Stop the causative agent first, then implement emergency protocols.

Summary

  • Always perform thorough medication reconciliation, including supplements and OTCs.
  • Monitor high-alert drugs closely; understand critical lab values and dietary interactions.
  • Prioritize IV safety—recognize early signs of complications and use correct equipment.
  • Educate patients on proper sharps and medication disposal to prevent harm and misuse.
  • In emergencies, stop the causative agent first and follow established protocols for patient safety.
  • Consistency—in both patient education and clinical practice—is key to safe medication management.
Was this helpful?

Join us to receive notifications about our new vlogs/quizzes by subscribing here!