Dr. Hale's idea of classification of a drug is a very good idea, but it needs some refinement. L3 (moderately safe) includes many drugs which are obviously very safe. The reason they are not included in L1 or 2 is that there are no studies which support the theoretical reasons why these drugs would be safe. Thus, though interferon is too big to get into the milk and cannot, thus possibly cause harm to the baby, it is classified as L3. Unfortunately, too many physicians will look at that (moderately safe) and say, "Moderately safe is just not safe enough". That is why any tool needs to be used properly. Too many people will look just at the classification without looking at the pharmacokinetics. Jack Newman, MD, FRCPC *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html