Pain and CPK Elevation after Intramuscular Digoxin

Abstract
To the Editor: Digoxin is available for intravenous or intramuscular administration in the form of Lanoxin brand of digoxin injection (0.25 mg per milliliter in a vehicle containing 40 per cent propylene glycol, 10 per cent ethanol, 0.3 per cent sodium phosphate, and 0.08 per cent anhydrous citric acid). The manufacturer's product information states that this injection does not require dilution, and does not mention postinjection pain. Digoxin injection is usually given intravenously to patients who require rapid digitalization. When the intramuscular route is used, usually because patients cannot take the drug by mouth, conscious patients frequently complain of local . . .

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