Is 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile Safe in Breastfeeding

I am a breastfeeding mother and i want to know if it is safe to use 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile? Is 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile safe for nursing mother and child? Does 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile extracts into breast milk? Does 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile has any long term or short term side effects on infants? Can 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile influence milk supply or can 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile decrease milk supply in lactating mothers?

No information is available on the clinical use of 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile during breastfeeding. If 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile is required by the mother, it is not a reason to discontinue breastfeeding.[1] However, until more data become available, 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile should be used with caution during breastfeeding and an alternate drug may be preferred, especially while nursing a newborn or preterm infant.[2] The manufacturer recommends that breastfeeding be discontinued during 3-((3R,4R)-4-Methyl-3-(methyl(7H-pyrrolo(2,3-d)pyrimidin-4-yl)amino)piperidin-1-yl)-3-oxopropanenitrile therapy and for 18 hours after the last dose of Xeljanz or 36 hours after the last dose of Xeljanz XR.