Calcium Chloride Injection, USP

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10% Calcium Chloride Injection, USP is a sterile, nonpyrogenic, hypertonic solution containing 100 mg (1.4 mEq/mL) of calcium chloride, dihydrate (1.4 mEq each of Ca++ and Cl¯ ) in water for injection. It is provided in a 10 mL Unit of Use Syringe to facilitate prompt intravenous injection.
The solution is administered only by intravenous or intraventricular cavity injection as a calcium replenisher.
The solution contains no bacteriostat, antimicrobial agent or added buffer and is intended only for use as a single-dose injection. As per USP testing, when diluted with water for injection to make a 5% solution, the pH of calcium chloride injection is 6.3 (5.5 to 7.5). May contain hydrochloric acid and/or sodium hydroxide for pH adjustment. The osmolar concentration is 2.04 mOsmol/mL (calc.). 10% Calcium Chloride Injection, USP is oxygen sensitive. Calcium Chloride, USP dihydrate is chemically designated CaCl2 · 2H2O (dihydrate) white, odorless fragments or granules freely soluble in water.

CLINICAL PHARMACOLOGY
Calcium is the fifth most abundant element in the body and the major fraction is in the bony structure. Calcium plays important physiological roles, many of which are poorly understood. It is essential for the functional integrity of the nervous and muscular systems. It is necessary for normal cardiac function and is one of the factors that operates in the mechanisms involved in the coagulation of blood. Calcium chloride in water dissociates to provide calcium (Ca++) and chloride (Cl¯ ) ions. They are normal constituents of the body fluids and are dependent on various physiological mechanisms for maintenance of balance between intake and output. Approximately 80% of body calcium is excreted in the feces as insoluble salts; urinary excretion accounts for the remaining 20%.

INDICATIONS AND USAGE
10% Calcium Chloride Injection, USP is indicated (1) for the treatment of hypocalcemia in those conditions requiring a prompt increase in blood plasma calcium levels, (2) in the treatment of magnesium intoxication due to overdosage of magnesium sulfate and (3) to combat the deleterious effects of hyperkalemia as measured by electrocardiographic (ECG), pending correction of the increased potassium level in the extracellular fluid.
10% Calcium Chloride Injection, USP also may be used in cardiac resuscitation when weak or inadequate contractions return following defibrillation or when epinephrine injection has failed to strengthen myocardial contractions.