Monoject U-100 1 ml Insulin Syringe Luer-Lock with Tip Cap Soft Pack is used for IV insulin. Certain lots are incompatible with needleless connectors.

http://www.fda.gov/medical-devices/medical-device-recalls/syringe-recall-cardinal-health-removes-certain-monoject-u-100-ml-insulin-syringe-luer-lock-tip-cap