Many antibiotics are safer in pregnancy and breastfeeding than commonly believed. A new ENTIS webinar breaks down the evidence, debunking outdated fears around quinolones, doxycycline, and others. Experts say overly cautious prescribing — often driven by pharma labeling and AI tools — may be doing more harm than good.
Fear of harming a fetus or infant often leads clinicians to avoid antibiotics in pregnant and breastfeeding patients — but a new webinar from the European Network of Teratology Information Services (ENTIS) says that caution is frequently overblown. Presented at a World Organization of Family Doctors event, the talk walked through current evidence on antibiotic safety across pregnancy trimesters and lactation, pushing back on restrictions driven by outdated animal studies, overly cautious pharma labeling, and even AI clinical tools.
The baseline risk for major birth defects in the general population is already 3%–5%, and many antibiotics don't meaningfully raise that risk. Quinolones, long avoided due to cartilage damage seen in young animals, have been shown in human studies to be safe and don't cause joint problems in children. Doxycycline is safe in the first trimester (before week 14), and macrolides, clindamycin, and metronidazole are considered safe across all trimesters.
Key Takeaways:
Why it matters: Undertreating infections in pregnancy carries real risks — for both mother and baby. Evidence-based prescribing guidance helps clinicians move past unnecessary restrictions and make safer, more informed decisions.
