Can I take rocaltrol (calcitriol) while breastfeeding?

Yes. According to lactmed, a free database from the national library of medicine on medications and breastfeeding, if you need to take Rocaltrol (calcitriol) there is no need to discontinue breastfeeding.
Yes. According to all current data available, it seems that there are no adverse effects experienced by babies whose mothers have been taking Rocaltrol (calcitriol).