Alison-- There is a reference to the use of magnesium for vasospasm in Susan Meintz Maher's excellent booklet "An Overview of Solutions to Breastfeeding and Sucking Problems" (LLLI, 1988), p. 14. **Leslie** [Leslie Ayre-Jaschke, BEd, IBCLC Peace River Breastfeeding Clinic, Peace River, Alberta, Canada] Leslie Ayre-Jaschke, BEd, IBCLC Peace River Breastfeeding Clinic, Peace River AB Canada e-mail <[log in to unmask]>