Hypersensitivity to neomycin & polymyxin. Does not protect against diseases caused by other types of
H. influenzae nor against meningitis caused by other organisms. Postpone vaccination in patients w/ acute severe febrile illness. Do not administer IV. Thrombocytopenia or bleeding disorder. Syncope (fainting) may occur. Patients receiving immunosuppressive therapy. Rectal temp ≥40°C, collapse or shock-like state (hypotonic-hyporesponsive episode), persistent & inconsolable crying lasting ≥3 hr, occurring w/in 48 hr of vaccination; convulsion w/ or w/o fever w/in 3 days of vaccination. In childn w/ progressive neurological disorders eg, infantile spasms, uncontrolled epilepsy or progressive encephalopathy. History of febrile convulsions, family history of convulsions, Sudden Infant Death syndrome or adverse event following DTP, IPV &/or HIB vaccination. Excretion of capsular polysaccharide antigen in the urine. Consider risk of apnoea & monitor resp for 48-72 hr in very premature infants (≤28 wk of gestation) & those w/ history of resp immaturity. Not recommended in adults, adolescents & childn >5 yr.