Over four out of ten women in the maternity wards have DRPs, and many have questions about drug use during pregnancy and lactation. Many of the DRPs could probably be avoided by providing patient-reported treatment reviews to pregnant women as a part of antenatal care. Multidisciplinary collaboration including physicians, midwifes, and pharmacists in antenatal care and in maternity ward could possibly prevent DRPs and thereby promote patient safety for pregnant and lactating women.