Is Strontium chloride, SR-89 Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use Strontium chloride, SR-89? Is Strontium chloride, SR-89 safe for nursing mother and child? Does Strontium chloride, SR-89 extracts into breast milk? Does Strontium chloride, SR-89 has any long term or short term side effects on infants? Can Strontium chloride, SR-89 influence milk supply or can Strontium chloride, SR-89 decrease milk supply in lactating mothers?

IInformation in this record refers to the use of strontium 89 as a therapeutic agent. No information is available on the therapeutic use of strontium 89 during breastfeeding. It has been estimated that about 9% of the strontium in the maternal bloodstream reaches breastmilk for another strontium isotope, strontium 90.[1] Because strontium can substitute for calcium in infant bones, the manufacturer and expert opinion recommend discontinuing breastfeeding before a nursing mother receives strontium 89 chloride.[2]