The maximum safe dose administered in clinical studies was 40 micrograms.
2)Dose adjustment
Currently accepted levels for the PTH range in patients with terminal renal failure undergoing dialysis are not more than 1.5 to 3 times the non-uremic normal upper limit, 15.9 to 31.8 pmol/l (150-300 pg/ml), for intact PTH. To achieve the desired levels of physiological variables, individualized dose adjustment and monitoring are necessary.
If hypercalcemia or a corrected Ca x P product, persistently elevated, greater than 5.2 mmol2/l2(65 mg2/dl2), is observed, reduce or discontinue the dose until these parameters normalize.
Then,reinitiate administration of paricalcitol at lower doses. It may be necessary to reduce the dose when PTH levels decrease in response to therapy.
The following table is suggested as an approximation for dose adjustment:
Guideline suggested dose (dose adjustment in intervals of 2 to 4 weeks) | |
PTH level in relation to the baseline level | Paricalcitol dose adjustment |
Equal to or greater than | Increase by 2 to 4 micrograms |
Decrease <30% | |
Decrease = 30% and = 60% | Maintain |
Decrease > 60% | Decrease by 2 to 4 micrograms |
PTHi <15.9 pmol/l (150 pg/mL) |
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