The article you requested is

Bupropion Levels in Breast Milk for 4 Mother-Infant Pairs: More Answers to Lingering Questions

J Clin Psychiatry 2009;70(2):297-298 [letter]

Letter to the Editor

Sir: Bupropion is an atypical antidepressant labeled for depression and smoking cessation. There is limited pharmacokinetic information about bupropion in the perinatal period. The purposes of this study were (1) to provide additional estimates of the concentration of bupropion in breast milk relative to maternal serum levels in nursing women and (2) to estimate the residual concentration of bupropion in nursing infants.