Impact of antibiotic side effects and allergies on patient adherence and attitudes: a mixed methods study in England

Liam Michael Clayton1, Catherine V Hayes1, Luke O'Neill1

  • 1Primary Care and Interventions Unit, UK Health Security Agency, England, UK.

BJGP Open
|December 17, 2025
PubMed
Abstract

Insights

Antibiotic side effects impact patient behavior, leading many to stop treatment prematurely. Improved communication and reassessment of allergies are crucial for appropriate antibiotic use and combating antimicrobial resistance.

Area of Science:

  • Pharmacology
  • Patient Behavior Studies
  • Public Health

Background:

  • Antibiotic misuse fuels antimicrobial resistance (AMR).
  • While antibiotic adverse reactions are known, their effect on patient behavior needs more study.

Purpose of the Study:

  • To investigate how antibiotic side effects and allergies influence patient behavior regarding prescribed antibiotic use.

Main Methods:

  • A mixed-methods study in England involving a survey of 1059 adults and focus groups with 21 participants.
  • Descriptive statistics, chi-squared tests, and thematic analysis were used to analyze data.

Main Results:

  • Many patients experienced disruptive antibiotic side effects.
  • A third were unaware of potential side effects due to poor information access.
  • Nearly half did not complete antibiotic courses after experiencing side effects, with many stopping treatment without medical advice.

Conclusions:

  • Antibiotic side effects significantly affect patients and can lead to inappropriate use, contributing to AMR.
  • Enhanced patient information and reassessment of allergy labels are recommended to improve antibiotic adherence and management.

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