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warnings and cautions
5 WARNINGS AND PRECAUTIONS Treat mild hypercalcemia by reducing or interrupting calcium acetate capsules and Vitamin D. Severe hypercalcemia may require hemodialysis and discontinuation of calcium acetate capsules. ( ) 5.1 Hypercalcemia may aggravate digitalis toxicity. ( ) 5.2 5.2 Concomitant Use with Medications Hypercalcemia may aggravate digitalis toxicity.
6 ADVERSE REACTIONS Hypercalcemia is discussed elsewhere [see ] Warnings and Precautions (5.1) The most common (> 10%) adverse reactions are hypercalcemia, nausea and vomiting. ( ) 6.1 In clinical studies, patients have occasionally experienced nausea during calcium acetate therapy. ( ) 6 To report SUSPECTED ADVERSE REACTIONS, contact Camber Pharmaceuticals Inc. at 1-866-495-8330 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. In clinical studies, calcium acetate has been generally well tolerated. Calcium acetate was studied in a 3-month, open-label, non-randomized study of 98 enrolled ESRD hemodialysis patients and an alternate liquid formulation of calcium acetate was studied in a two week double-blind, placebo-controlled, cross-over study with 69 enrolled ESRD hemodialysis patients. Adverse reactions (>2% on treatment) from these trials are presented in Table 1. Mild hypercalcemia may be asymptomatic or manifest itself as constipation, anorexia, nausea, and vomiting. More severe hypercalcemia is associated with confusion, delirium, stupor, and coma. Decreasing dialysate calcium concentration could reduce the incidence and severity of calcium acetate-induced hypercalcemia. Isolated cases of pruritus have been reported, which may represent allergic reactions. Table 1 6.2 Postmarketing Experience Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or to establish a causal relationship to drug exposure. The following additional adverse reactions have been identified during post-approval of calcium acetate: dizziness, edema, and weakness.