Is Thallous chloride (201TlCl) Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use Thallous chloride (201TlCl)? Is Thallous chloride (201TlCl) safe for nursing mother and child? Does Thallous chloride (201TlCl) extracts into breast milk? Does Thallous chloride (201TlCl) has any long term or short term side effects on infants? Can Thallous chloride (201TlCl) influence milk supply or can Thallous chloride (201TlCl) decrease milk supply in lactating mothers?

Information in this record refers to the use of Thallous chloride (201TlCl) as a diagnostic agent. The International Commission on Radiological Protection recommends discontinuation of breastfeeding for 48 hours after an unspecified dose of Thallous chloride (201TlCl).[1] The United States Nuclear Regulatory Commission recommends that breastfeeding should be interrupted for 2 weeks after administration of Tl 201 in a dose of 100 MBq (3 mCi) to a nursing mother.[2] During the period of interruption, the breasts should be emptied regularly and completely. If the mother has expressed and saved milk prior to the examination, she can feed it to the infant during the period of nursing interruption.[3][4][5] The milk that is pumped by the mother during the time of breastfeeding interruption can either be discarded or stored frozen and given to the infant after 10 physical half-lives, or about 30 days, have elapsed. After doses greater than 150 MBq, consideration of temporarily limiting close contact between the mother and infant.[5] Mothers concerned about the level of radioactivity in their milk could ask to have it tested at a nuclear medicine facility at their hospital. When the radioactivity is at background levels they may safely resume breastfeeding. A method for measuring milk radioactivity and determining the time when a mother can safely resume breastfeeding has been published.[6]