Prevention of allergic immunization reactions.
D002744:Chlorpheniramine / Q000627:therapeutic use*; D004342:Drug Hypersensitivity / Q000517:prevention & control; D004641:Emigration and Immigration; D005512:Food Hypersensitivity / Q000517:prevention & control; D006801:Humans; D006969:Hypersensitivity, Immediate / Q000517:prevention & control*; D010406:Penicillins / Q000009:adverse effects; D012713:Serum Sickness / Q000517:prevention & control*; D014195:Travel; D014611:Vaccination / Q000009:adverse effects*; D014612:Vaccines / Q000009:adverse effects*
D010406:Penicillins; D014612:Vaccines; D002744:Chlorpheniramine