BF Answer Book has a whole chapter on Drugs, Vitamins, Vaccines, and
Diagnostic Tests.  Page 509 refers  you to the following for specific drugs:

AAP List (a new one is out and accessible by internet)  Briggs et al, Hale,
Lawrence and the US Pharmacopeial Convention publication.  Hale also has a
somewhat new book on Clinical Therapy in Breastfeeding Patients.  Merewood &
Philipp (both MDs) have a new book out called Breastfeeding: Conditions and
Diseases (available from Hale-Pharmasoft Publications
www.iBreastfeeding.com

Hope this is useful. Sincerely, Pat in SNJ

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