Method: Evaluating the need of providing drug information in Tu Du and Hung Vuong obstetrical hospitals; establishing a database on drug information for lactating women bases on specific obstetrical books: Drugs in Pregnancy and Lactation - Briggs GG, Drugs and Breastfeeding - the Royal Women's Hospital, Drugs for Pregnant and Lactating women - Weiner are being used in almost of domestic and foreign hospitals; developing the searching software drug information for lactating women in Vietnamese.