|
Pronunciation |
|
(par
eh CAL ci
tol) |
|
|
U.S. Brand
Names |
|
Zemplar™ |
|
|
Generic
Available |
|
No |
|
|
Pharmacological Index |
|
Vitamin D Analog |
|
|
Use |
|
Prevention and treatment of secondary hyperparathyroidism associated with
chronic renal failure. Has been evaluated only in hemodialysis
patients. |
|
|
Pregnancy Risk
Factor |
|
C |
|
|
Contraindications |
|
Should not be given to patients with evidence of vitamin D toxicity,
hypercalcemia, or hypersensitivity to any of the ingredients of this
product |
|
|
Warnings/Precautions |
|
The most frequently reported adverse reactions with paricalcitol include
nausea, vomiting, and edema. Chronic administration can place patients at risk
of hypercalcemia, elevated calcium-phosphorus product and metastatic
calcification; it should not be used in patients with evidence of hypercalcemia
or vitamin D toxicity. |
|
|
Adverse
Reactions |
|
The three most frequently reported events in clinical studies were nausea,
vomiting, and edema, which are commonly seen in hemodialysis patients.
1% to 10%:
Cardiovascular: Palpitations, peripheral edema (7%)
Central nervous system: Chills, malaise, fever, lightheadedness (5%)
Gastrointestinal: Vomiting (8%), GI bleeding (5%), xerostomia (3%)
Respiratory: Pneumonia (5%)
Miscellaneous: Flu-like symptoms, sepsis |
|
|
Overdosage/Toxicology |
|
Acute overdose may cause hypercalcemia; monitor serum calcium and phosphorus
closely during titration of paricalcitol; dosage reduction/interruption may be
required if hypercalcemia develops; chronic use may predispose to metastatic
calcification; bone lesions may develop if parathyroid hormone is suppressed
below normal |
|
|
Drug
Interactions |
|
Phosphate or vitamin D-related compounds should not be taken concurrently;
digitalis toxicity is potentiated by hypercalcemia |
|
|
Mechanism of
Action |
|
Synthetic vitamin D analog which has been shown to reduce PTH serum
concentrations |
|
|
Pharmacodynamics/Kinetics |
|
Protein binding: >99%
Elimination: Hepatobiliary excretion (74%) in healthy subjects; urinary
excretion (16%), metabolites represent 51% to 59%
Kinetics have not been investigated in geriatric, pediatric, or hepatically
impaired patients |
|
|
Usual Dosage |
|
Adults: I.V.: 0.04-0.1 mcg/kg (2.8-7 mcg) given as a bolus dose no more
frequently than every other day at any time during dialysis; doses as high as
0.24 mcg/kg (16.8 mcg) have been administered safely; usually start with 0.04
mcg/kg 3 times/week by I.V. bolus, increased by 0.04 mcg/kg every 2 weeks; the
dose of paricalcitol should be adjusted based on serum PTH levels, as follows:
Serum PTH level decreased by <30%: Increase paricalcitol dose
Serum PTH level decreased by >30% and <60%: Maintain paricalcitol dose
Serum PTH level decrease by >60%: Decrease paricalcitol dose
Serum PTH level 1.5-3 times upper limit of normal: Maintain paricalcitol dose
|
|
|
Monitoring
Parameters |
|
Serum calcium and phosphorus should be monitored closely (eg, twice weekly)
during dose titration; monitor for signs and symptoms of vitamin D intoxication;
serum PTH; in trials, a mean PTH level reduction of 30% was achieved within 6
weeks |
|
|
Mental Health: Effects
on Mental Status |
|
May cause dizziness |
|
|
Mental Health:
Effects on Psychiatric
Treatment |
|
None reported |
|
|
Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
|
No information available to require special precautions |
|
|
Dental Health:
Effects on Dental Treatment |
|
No effects or complications reported |
|
|
Patient
Information |
|
Take as directed; do not increase dosage without consulting prescriber.
Adhere to diet as recommended (do not take any other phosphate or vitamin D
related compounds while taking paricalcitol). You may experience nausea or
vomiting (small frequent meals, frequent mouth care, chewing gums, or sucking
lozenges may help); swelling of extremities (elevate feet when sitting);
lightheadedness or dizziness (use caution when driving or engaging in tasks
requiring alertness until response to drug is known). Report persistent fever,
gastric disturbances, abdominal pain or blood in stool, chest pain or
palpitations, or signs of respiratory infection or flu.
Pregnancy/breast-feeding precautions: Inform prescriber if you are or intend
to be pregnant. Consult prescriber if breast-feeding. |
|
|
Dosage Forms |
|
Injection: 5 mcg/mL (1 mL, 2 mL, 5
mL) |
|
Copyright © 1978-2000 Lexi-Comp Inc. All Rights Reserved
|