Neisseria Meningitidis Serogroup A Conjugate Vaccine
This vaccine provides active immunization against Neisseria meningitidis serogroup A, a bacterium that causes serious meningococcal infections including meningitis and septicemia. It is primarily used for individuals traveling to or residing in regions where serogroup A meningococcal disease is endemic, as well as for outbreak control and high-risk populations.
A conjugate vaccine that protects against meningococcal disease caused by Neisseria meningitidis serogroup A.
Key facts at a glance
- RxNorm
- 797629
- Generic
- Neisseria Meningitidis Serogroup A Capsular Polysaccharide Diphtheria Toxoid Protein Conjugate Vaccine
- Class
- unclassified
- Brands
- Menactra
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- prefilled syringe, injection
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Prevention of invasive meningococcal disease caused by Neisseria meningitidis serogroup A. Recommended for travelers to hyperendemic areas, populations in the meningitis belt of sub-Saharan Africa, and during outbreak situations involving serogroup A strains.
The vaccine contains capsular polysaccharide from N. meningitidis serogroup A conjugated to diphtheria toxoid protein. This conjugation converts the T-cell independent polysaccharide antigen into a T-cell dependent antigen, enhancing immunogenicity and inducing stronger, longer-lasting antibody responses.
Administered as a single intramuscular dose. Common adverse effects include injection site reactions, fever, and headache. Should not be used during acute febrile illness. Pregnancy use only when clearly needed. Revaccination may be considered for individuals with continued high-risk exposure.
Official drug label
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 29, 2026. · Read our editorial policy