Drugs in Pregnancy and Lactation - Medications used in Swiss Obstetrics.

As with during pregnancy, the same active ingredients are consistently used in Swiss perinatal centres for many different indications during lactation. Most of these active ingredients are labelled with a warning or are even considered to be contraindicated; their use is therefore mainly off-label. Official authorisation for frequently or consistently used active substances is urgently needed. With this study, a first important step towards national harmonisation has been taken.