Accuracy of penicillin allergy reporting

Area of Science:

• Clinical Pharmacy
• Patient Safety
• Pharmacovigilance

Background:

• Inaccurate penicillin allergy documentation is a common issue in healthcare settings.
• Mislabeling patients as penicillin-allergic can lead to the use of broader-spectrum, more toxic, and expensive alternative antibiotics.
• The discrepancy between self-reported allergies and documented evidence necessitates a review of current practices.

Purpose of the Study:

• To assess the consistency of penicillin allergy documentation across patient charts, pharmacy profiles, and medication administration records.
• To evaluate the accuracy of self-reported penicillin allergy histories by interviewing patients.
• To determine the impact of inaccurate documentation on antimicrobial selection and patient care.

Main Methods:

• Interviewed 150 adult inpatients with a reported penicillin allergy regarding reaction details.
• Classified patients into 'more severe allergy,' 'less severe allergy,' or 'intolerance' categories based on interview data.
• Reviewed patient charts, pharmacy profiles, and medication administration records for allergy documentation and analyzed antimicrobial use.

Main Results:

• Of 117 evaluated patients, 82.9% were classified as allergic and 17.1% as intolerant.
• Penicillin allergy was documented in 98.7% of charts and 96.7% of medication administration records.
• Detailed allergic reaction symptoms were documented in only 34% of charts, and alternative antibiotics were often more toxic (70.4%), equally effective, and more costly (55.5%).

Conclusions:

• Most patients labeled as penicillin-allergic have a history consistent with an allergy, but detailed documentation is lacking.
• Inaccurate allergy documentation contributes to the use of suboptimal antimicrobial agents.
• Pharmacists play a vital role in verifying allergy information and improving documentation accuracy through patient evaluation and education.