Psychiatry AdvisorCertain Antibiotics May Increase Risk for Psychotic Symptoms in Youth

ℹ️ Observational Association Only Evidence

Medication exposure is relevant when evaluating new psychotic symptoms, but spontaneous reports cannot determine how often a drug causes them. Researchers examined FAERS reports involving 24 antibiotics in children aged 3–17 years through August 2025. They identified 417 psychotic-symptom reports, with disproportionate reporting for several antibiotic classes relative to minocycline. These conference findings are hypothesis-generating; the supplied account lacks confidence intervals, detailed adjustment methods, and a clear denominator for its reported prevalence.

Clinical Considerations

• Reported odds ratios were 6.73 for fluoroquinolones, 6.59 for macrolides, and 3.16 for penicillins; these measure reporting disproportionality, not clinical risk.
• Hospitalization was reported in 38% of psychotic-symptom reports; this selected reporting sample cannot establish severity rates among all antibiotic recipients.
• The reported 1.4% database proportion must not be presented as psychosis prevalence among children receiving antibiotics.
• Minocycline is a reference comparator, not evidence of a protective effect or a preferred alternative.
• Underreporting, duplicate reports, concomitant medications, and confounding by infection or illness severity may affect interpretation.
• Proposed neurotransmitter, microbiome, and inflammatory pathways remain hypotheses; the analysis does not establish a mechanism.

Practice Applications

• Review recent antibiotics, other medications, symptom timing, and concurrent illness when evaluating new-onset psychotic symptoms.
• Interpret the findings as a prompt for clinical assessment, not grounds for automatic antibiotic discontinuation or class-wide avoidance.
• Avoid attributing symptoms to medication alone; consider alternative medical and psychiatric explanations and coordinate evaluation with the treating team.