My notes from this summer's LLLI Conference in DC from Dr. Cheston Berlin's session, "Drugs and Chemicals in Human Milk" say that Seldane has been removed from the market b/c of cardiac complications from its use. 2 metabolites, Allegra and Claritan are still available. In 1995, the first antihistamine/human milk study was done using Allegra and found 200 ng/L at peak concentration--which is likely not measurable. Dr. Cheston opined that both Allegra and Claritan are safe for bf moms. I am sorry I do not have a reference, nor did I see one in the bibliography in the syllabus that fits. This information was sort of an aside during his presentation; if he gave a reference I missed it. Karen Zeretzke, MEd, IBCLC Baton Rouge, Louisiana [log in to unmask]