Caraco Pharmaceutical Laboratories, Ltd. announced that all tablets of Caraco brand Digoxin, USP, 0.125 mg, and Digoxin, USP, 0.25 mg, distributed prior to March 31, 2009, which were not expired and were within the expiration date of September, 2011, were being voluntarily recalled to the consumer level. The tablets were recalled because they may differ in size and therefore could have more or less of the active ingredient, digoxin. Digoxin is a drug product used to treat heart failure and abnormal heart rhythms. It has a narrow therapeutic index and the existence of higher than labeled dose may pose a risk of digoxin toxicity in patients with renal failure. Digoxin toxicity can cause nausea, vomiting, dizziness, low blood pressure, cardiac instability, and bradycardia. Death can also result from excessive digoxin intake. A lower than labeled dose may pose a risk of lack of efficacy potentially resulting in cardiac instability.