Background: Antibiotic self-medication is common in low- and middle-income countries. This study aimed to evaluate the Sri Lankan public's knowledge about and attitudes toward antibiotic use and self-medication, and factors associated with self-medication.
Methods: A national cross-sectional, interviewer-administered, survey of a random household sample (N = 1100) was conducted. Factor analysis of the attitudinal items was conducted to investigate the factors associated with antibiotic self-medication.
Results: A response rate of ninety-one percent (n = 998) responded. Knowledge about antibiotics was poor (mean = 12.5; SD = 3.5; (scale 0-27)). Half had previously used an antibiotic once in the past three months. About 11% (108/998) had self-medicated the last time they took antibiotics; mostly obtained from a pharmacy (82%; 89/108). Three attitudinal factors were obtained, explaining 56.1% of the variance. Respondents were less likely to self-medicate if they did not support ease of access to antibiotics from pharmacies (p< 0.001) and situational use of antibiotics (p= 0.001); supported appropriate use of antibiotics (p= 0.003); and had greater knowledge about prescription requirements for antibiotics (p= 0.004).
Conclusion: There is limited knowledge about, and a high rate of self-medication with antibiotics.Factors contributing to self-medication could be addressed with appropriate public education campaigns, and policy changes.
Keywords: Antibiotics; Sri Lanka; antibiotic resistance; attitudes; general public; knowledge; quantitative study; self-medication; survey.