Reduce or discontinue dose if PTH levels decrease below recommended target range. Not recommended in patients w/ parathyroid carcinoma, primary hyperparathyroidism or w/ CKD who are not on hemodialysis. Measure serum Ca levels prior to initiating treatment, w/in 1 wk of initiation or dose adjustment & every 4 wk during treatment; in patients w/ congenital long QT syndrome, previous history of QT prolongation, family history of long QT syndrome or sudden cardiac death, & other conditions that predispose to QT prolongation & ventricular arrhythmia; history of convulsion disorder, CHF. Concomitant use w/ drugs known to lower serum Ca & cinacalcet. May affect ability to drive or operate machinery. Pregnancy & lactation. Childn <18 yr.
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