For information on Clopixol (zuclopenthixol) a tranquilizer with properties similar to chlorpromazine, see: Drugs in Pregnancy and Lactation, FIFTH edition, 1998 Briggs, Freeman, and Yaffe Pages 1157-8 Basically, no adverse effects have been shown in seven breastfed infants, but caution is advised, especially during prolonged therapy. Frank J. Nice, DPA, CPHP