Hepatitis B vaccine while breastfeeding

Breastfeeding status is one part of the clinical conversation, not a substitute for reviewing your exposure risk, previous doses, allergies, and health conditions. The vaccine is intended to prepare your immune system against hepatitis B; it does not treat an infection that is already present.

Hepatitis B can affect the liver and may cause few early symptoms. If illness develops, fatigue, nausea, yellowing of the eyes or skin, or dark urine can occur. See [Hepatitis B] for an overview and [Dark Urine] for symptom context.

Tell the clinician that you are breastfeeding, share your vaccination record, and explain any recent or planned exposure through healthcare work, travel, household contact, sexual contact, tattoos, piercings, or medical procedures. They can decide whether vaccination, testing, or both are appropriate.

Do not delay urgent advice after contact with infected blood or body fluids. Keep wounds covered, avoid sharing personal items that may carry blood, and ask about a prevention plan for close contacts. The [Hepatitis B Vaccination] page gives further practical detail.

Get prompt medical advice after a needlestick, blood splash, bite that breaks skin, or sexual exposure involving possible hepatitis B. Mention the exposure and that you are breastfeeding so the clinician can choose appropriate next steps.

Seek assessment for persistent vomiting, marked fatigue, abdominal pain, yellow eyes or skin, or dark urine. A [Liver Function Test] may help assess liver irritation, but symptoms alone cannot identify their cause.

Ask: Does breastfeeding affect my vaccination plan? Which doses are missing? Do I need testing? How should I respond if my baby or I have a possible exposure?