Tandem Diabetes Care, Inc. announced that it is initiating a voluntary recall of specific lots of insulin cartridges that are used with the t:slim Insulin Pump. The affected cartridges may be at risk for leaking. The cause of the recall was identified during Tandem's internal product testing, and has not been associated with any complaints or adverse events reported by customers.

However, a cartridge leak could potentially result in the device delivering too much or too little insulin, which can lead to a serious adverse event. Customers should discontinue using cartridges labeled with the below lot numbers, which were shipped on or after December 17, 2013. The affected lots represent approximately 4,746 boxes of cartridges (10 cartridges per box).

Affected Lot Numbers: M001963 M001980 M002027 M002083 M002119: M001964 M001987 M002028 M002096 M002120: M001973 M001988 M002029 M002097: M001974 M001990 M002030 M002099: M001979 M001991 M002082 M002100.