A study to determine the effect of Zemplar on the regulation of serum calcium levels and the need for administration of elemental calcium in hypocalcemic intensive care patients

Inclusion Criteria:

• ICU patients APACHE III score between 70 - 150 at screening and within 24 hours of enrollment and a whole blood ionized calcium level less than 0.90 mmol/L or corrected whole blood calcium level less than or equal to 7.5 mg/dL.

Exclusion Criteria:

• Serum creatinine greater than 2.5 mg/dL