Pedvax HIB intramuscular precautions What should I know regarding pregnancy, nursing and administering Pedvax HIB intramuscular to children or the elderly?If you are: Pregnant: Only When Necessary: NOT RECOMMENDED/NOT INDICATED FOR USE IN PREGNANCY Nursing: No Known Risk: HIB ANTIBODIES ARE EXCRETED IN BREASTMILK. An adult over 60: Giving Pedvax HIB intramuscular to a child under 12: Relative Contraindication: NOT RECOMMENDED AGE< 6 WEEKS. MAY IMPAIR IMMUNE RESPONSE. Warning: NOT RECOMMENDED AGE> 6 YRS. RARE USE W/ IMMUNOSUPPRESSION.