ActHIB
FDA Approved: 1993
Vaccine Type(s)
Ingredients
- Casein (milk proteins) 1 exposure
- Formaldehyde 0.5 mcg
What you can expect
These are the most commonly reported short-term reactions based on the manufacturer's official package insert.
⚠️ Very limited data — rates may not reflect real-world experience
Based on approximately 1,454 infants followed for only 48 hours post-vaccination; most subjects received other vaccines at the same time, making attribution uncertain.
Irritability
Very common
More than 5 in 10
Inconsolable crying
Very common
More than 5 in 10
Lethargy
Very common
More than 5 in 10
Injection site reactions
Less common
About 1 in 10
Source: FDA-approved package insert
See the Full Picture
Knowing what’s common is just the start.
- Compare reactions across brands
- See what shows up when vaccines are given together
- Understand what that means for you or your family