A prospective randomized pilot study on intermittent post-dialysis dosing of
cinacalcet.
Author(s): Haq N(1), Chaaban A, Gebran N, Khan I, Abbachi F, Hassan M, Bernsen R, Abouchacra
S.
Affiliation(s): Author information:
(1)Tawam Hospital in Affiliation with Johns Hopkins, Al Ain, Abu Dhabhi, United Arab
Emirates, nulhaq@kfshrc.edu.sa.
Publication date & source: 2014, Int Urol Nephrol. , 46(1):113-9
BACKGROUND: Treatment of secondary hyperparathyroidism (SHPT) is important in
management of patients with end-stage renal disease on hemodialysis (HD).
Calcimimetic agent, cinacalcet provides an option for control of SHPT in patients
who fail traditional therapy. It may not have optimal results in non-compliant
patients. To enhance compliance, we evaluated effectiveness of post-dialysis
dosing of cinacalcet (group AD) as compared to daily home administration (group
D) in a prospective randomized trial of HD patients with refractory SHPT.
METHODS: After 2-week run-in phase, patients were randomly assigned to two
treatment groups. In group AD (N = 12), patients were administered cinacalcet on
the day of dialysis (3 times/week) by dialysis staff, while in control group D (N
= 11), cinacalcet was prescribed daily to be taken by patients at home. Intact
parathyroid hormone (i-PTH), serum calcium, phosphorus, and alkaline phosphatase
were followed for 16 weeks and compared to baseline in both groups. Data were
analyzed using between-groups linear regression for repeated measures.
RESULTS: No significant decline in i-PTH occurred in group AD at 16 weeks as
compared to a significant drop in group D (p = 0.006). However, subgroup analysis
showed effectiveness of post-dialysis dosing in patients with less severe SHPT (p
= 0.04).
CONCLUSION: Although daily dosing overall was more effective for treatment of
SHPT, dialysis dosing was effective in patients with less severe SHPT. This
warrants a larger study considering the limitations of this pilot trial. In the
meantime, dialysis dosing can be considered in non-compliant patients with less
severe SHPT.
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