No this is probably betaseron, a form of interferon. And it is *not* contraindicated during breastfeeding. I am wondering about the neurologist's grasp of breastfeeding if he is asking the mother to start pumping at 16 weeks gestation. His heart may be in the right place, but he should not be telling mothers that interferon requires the mother not to breastfeed. Jack Newman, MD, FRCPC