What should you know about a hepatitis B booster dose for adults?

Adults who work with blood, receive regular dialysis, use medicines that suppress immunity, or live with someone who has hepatitis B may have different protection needs. A previous vaccine course may be enough, or a clinician may recommend an additional dose or blood testing. The answer also depends on whether the original doses can be verified and whether an exposure has happened recently.

Collect any vaccination records and tell your clinician about healthcare work, sexual or household exposure, immune conditions, and medicines. Book a review rather than assuming you need to repeat every dose. Use safe sharps practices and do not share razors or toothbrushes while an infection concern is being assessed. See [Hepatitis B Vaccination](/treatments/preventive-care-and-vaccination/hepatitis-b-vaccination/) for related information.

Seek prompt medical advice after a needlestick, contact with infected blood, or unprotected sexual exposure; advice about preventive treatment may be time-sensitive. Arrange assessment for yellow eyes, [Dark Urine](/symptoms/dark-urine/), nausea, upper-abdominal pain, or new marked fatigue. Go to urgent care for confusion, severe weakness, repeated vomiting, or difficulty staying awake.

Ask whether your records show a complete course, whether your work or health condition changes the recommendation, and whether a blood test should guide the decision. Ask how to handle future exposures and whether household or sexual contacts need vaccination.