Vaccine reactions

Module Overview

  • Title: Managing Vaccine Reactions

  • Focus: Discussing adverse reactions post-vaccination and how to manage them.

  • Objective: By the end, participants should be able to compare local, systemic, and allergic vaccine reactions.

Types of Vaccine Reactions

Local Reactions

  • Description: Reactions directly at the injection site.

  • Examples: Pain, swelling, tenderness, redness.

  • Mild Reaction Depicted: Redness extending down the arm after mRNA COVID-19 vaccine booster.

Systemic Reactions

  • Description: Reactions not limited to the injection site.

  • Common Symptoms: Fever, malaise, muscle pain (myalgia), headaches.

  • Duration: Typically resolve within a couple of days.

  • Note: Symptoms are assessed in clinical trials to evaluate vaccine safety profiles.

Allergic Reactions

  • Description: Occurs in individuals allergic to components of the vaccine.

  • Incidence: Rare.

  • Screening Requirement: Thorough allergy history, including allergies to drugs, foods, and vaccines.

  • Types of Allergic Reactions: Ranges from urticaria (hives) to severe anaphylaxis.

  • Common Symptoms of Anaphylaxis: Hives, itching, flushing, angioedema (swelling of lips, tongue, throat).

Managing Anaphylaxis

  • First Line Treatment: Epinephrine is crucial for anaphylactic emergencies.

    • Mechanism of Action: Acts on alpha and beta receptors, increasing heart rate, and peripheral vasoconstriction.

    • Dosage Guidance: Administer every 5 to 15 minutes as needed.

    • Auto-Injectors: Suggested for easier use in emergencies.

  • Other Treatment Options: Antihistamines (diphenhydramine, cetirizine) may relieve itching but do not replace epinephrine.

    • Caution: Sedative effects can impair cognitive function.

Emergency Preparedness

  • Best Practices:

    • Have a clear plan and train pharmacy staff on handling emergencies like anaphylaxis.

    • Ensure access to procedures and protocols for adverse reactions.

  • Documentation Technologies: Use resources from organizations like the Immunization Action Coalition for templates and procedures.

Pain Management Post-Vaccination

  • Non-Prescription Pain Relief:

    • NSAIDs (Ibuprofen, Naproxen, Aspirin) may reduce immune response if taken before vaccination.

    • Recommendation: Use post-vaccination for fever or discomfort.

    • Topical options include lidocaine/prilocaine emulsion for pain reduction before injection.

    • Other options: Ice packs, cool compresses, distraction techniques for infants.

Syncope Related to Vaccination

  • Definition of Syncope: Temporary loss of consciousness due to decreased blood flow to the brain; often anxiety-induced.

  • Signs Prior to Syncope: Paleness, lightheadedness, nausea, dizziness.

  • Vaccines Associated with Syncope: Commonly reported following HPV, MCV4, and Tdap vaccines.

  • Management Strategies:

    • Ensure patient is seated or lying down during vaccination.

    • Offer beverages or snacks for preventive measures.

    • Maintain a controlled space if a patient faints, and elevate legs to restore blood flow.

Reporting Adverse Reactions

  • VAERS: Vaccine Adverse Event Reporting System

    • Purpose: Monitor vaccine safety and identify adverse patterns.

    • Reporting Requirement: Report any severe or unexpected adverse reactions.

  • Caveats: VAERS not designed to confirm causation but to monitor safety trends.