Nursing my children, that is! I now buy it for all new moms that I know plan to breastfeed. It thoroughly covers everything from Benadryl to Benzodiazepines, Antibiotics to Antacids, Antidepressants to Antifungals to pain medications! I hate to say it but most doctors are clueless and will as a blanket policy tell a mom to "wean your child and take this medication." Not only is it handy for showing the doctor how wrong he is, for finding alternative, safer medications - but it also includes Pregnancy safety category ratings, for moms-to-be. A very useful tool for any mom in any stage of pregnancy or breastfeeding, well worth every penny.