Management of Penicillin and Beta-Lactam Allergy
Beta-Lactam Allergy Management

Beta-Lactam Allergy Management

Patient History

Complete a thorough investigation of the patient’s allergies, including, but not limited to:

  • The specific drug the patient received
  • A detailed description of the reaction
  • Temporal relationship of the onset of the reaction with respect to when the drug was given
  • Concomitant drugs received when the reaction occurred
  • The time elapsed since the reaction occurred and tolerability of any structurally related compounds

Investigation Results

E.g. nausea, vomiting, diarrhea, headache

Recommendation:

  • Likely not allergic
  • Attempt beta-lactam therapy

E.g. severe cutaneous reactions such as Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), etc.

Recommendation:

  • Avoid all beta-lactam antibiotics including their use for allergy testing, desensitization and re-challenge
  • Treatment options include non-beta-lactam antibiotics

OR

E.g. interstitial nephritis, immune hepatitis, hemolytic anemia, serum sickness, drug rash with eosinophilia and systemic symptoms (DRESS), etc.

Recommendation:

  • Consult the Medical Microbiologist/Infectious Diseases Consultant

E.g. anaphylaxis, urticaria, angioedema, hypotension, bronchospasm, stridor, pruritis

Recommendation:

  • Avoid other penicillins and cephalosporins with similar side chain, unless patient undergoes desensitization
  • Treatment options include cephalosporins with dissimilar side chains or carbapenems or non-beta-lactam antibiotics
    • Note: ceFAZolin does not share a side chain with any beta-lactam agent

E.g. anaphylaxis, urticaria, angioedema, hypotension, bronchospasm, stridor, pruritis

Recommendation:

  • Avoid cephalosporins with similar side chains and penicillins with similar side chains unless desensitization is performed
  • Treatment options include penicillins with dissimilar side chains, cephalosporins with dissimilar side chains, carbapenems or non-beta-lactam antibiotics