hepatitis a vaccine: prescribing and clinical use
Focused clinical detail for use alongside current product information, local policy and patient-specific assessment.
hepatitis a vaccine: clinical details
Prescribing considerations
- Confirm the indication through travel, exposure, occupational and clinical risk assessment.
- Postpone vaccination during acute severe febrile illness; minor infection alone is not a reason to defer.
- Immunosuppression, HIV infection and haemodialysis may reduce antibody response; consider specialist input.
- Prepare for syncope and immediate anaphylaxis management.
- Account for bleeding risk when selecting the injection route and applying pressure.
- Consider phenylalanine content in people with phenylketonuria.
Contraindications and cautions
- Hypersensitivity to the active substance, an excipient or trace neomycin
- Confirmed anaphylaxis following a previous hepatitis A-containing vaccination
Monitoring
- Observe for immediate hypersensitivity and treat promptly.
- Reduce injury risk from vaccination-related fainting.
- Consider specialist assessment of vaccine response in significant immunosuppression or haemodialysis.
Clinical pharmacology
Inactivated hepatitis A antigen adsorbed onto aluminium hydroxide induces specific anti-hepatitis A virus antibodies; conventional pharmacokinetic assessment is not applicable to vaccines.
Formulation and product differences
- The adult product is a turbid suspension supplied in a pre-filled syringe or vial.
- It may contain trace neomycin and contains phenylalanine.
- Havrix Monodose is not recommended for children aged 1 to 15 years; a junior formulation is available.
hepatitis a vaccine interactions
Relevant issues mainly concern immune response and administration rather than conventional drug interactions.
Human normal immunoglobulin
It can be given at the same appointment at a different site, although the resulting hepatitis A antibody level may be lower.
Other vaccines
Compatible vaccines may be given at the same appointment using separate sites; they must not be mixed in the same syringe.
Immunosuppressive medicines
The immune response may be reduced, so specialist advice about protection and follow-up may be needed.
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.