Why does your PCP want you to take Calcitriol? What is the reason, if you ask for clarification, your PCP will not be able to justify why. Unless you have kidney issues I would not take cacitriol (kidneys play an important role in maintaining calcium balance which regualtes intestinal calcium absorption, simplified). Calcitriol acts on the kidneys to increase absorption and decrease calcium excretion in the urine, if your kidneys are normal, not necessary and as a DSer we have issues with absorbing medications in oil based form. Calcitriol is in cocnut oil and relatively insoluble in water, hence taking it is pretty much useless for us. You should monitor your 24 hr urine for calcium, also stone risk profile. You should monitor you cacium via PTH and ionized calcium. Calcitriol is a an oldie but goodie of endocrinologists. A PCP RXing this is very different than an endo, I will give more leeway here. My former Yale medical bone endocrinologist RXd this for me, I have no idea what these specialists are thinking, obviously I didn't take it and she is my former.