Several recent posts have related to nursing mothers experiencing nausea when breastfeeding. This may be due to the sucking-related release of gastrointestinal hormones in the mother. There is a significant rise in gastrin levels which occur within 30 seconds of the onset of breastfeeding. Changes in GI hormone levels in breastfeeding women occur as a protective effect to assure adequate energy supply for milk production. The baby's sucking at the breast activates the maternal gut endocrine system with a consequent increase in energy uptake. This increase in GI hormones could explain the problem. I have had a fair amount of success with mothers by recommending the use of sea bands or sea cuffs. These are elastic bands worn around the wrists with a button on the underside that is placed over the accupressure points that reduce nausea. These bands are often worn by people for motion sickness and can be found in maternity catalogs. An interesting reference for the changes in GI hormones is: Uvnas-Moberg K, Widstrom AM, Marchini G, Winberg J: Release of GI hormones in mother and infant by sensory stimulation. Acta Paediatr Scand 1987; 76:851-860.