McNeil-PPC, Inc. is recalling all lots of its Glacier Mint and Bubble Blast flavors of Listerine Agent Cool Blue. The company said it discovered that the preservative system is not adequate against certain microorganisms.

The recall affects all bottles of "Agent Cool Blue Plaque-Detecting Rinse," an estimated 4 million, from both retailers and consumers.

An assessment concluded that the risk of illness in healthy individuals following use of this product is very low, the company said. However, there could be a significant health risk to individuals with weakened or suppressed immune systems. To date, there have been no reports of adverse health events.

The recall affects all existing bottles of AGENT COOL BLUE Plaque-Detecting Rinse. Consumers should discontinue using and properly discard the product, and may obtain a full refund through calling the Company's toll free consumer line 1-888-222-0249 and mailing in the back label, including the UPC code. Additional information can be found at the product website --

Consumers can readily distinguish this product by the cartoon character on the front of the bottle, the company said. No other Listerine products are affected.

"We have voluntarily initiated this recall ... because our primary concern is that consumers have complete confidence in the safety and effectiveness of our products," said Paul Sturman, President, Consumer Healthcare North America, McNeil-PPC, Inc.

The mouth rinse has been sold to consumers through supermarkets, drug stores, mass merchants and other retail outlets, and is sold to dental professionals' offices nationwide. The company is contacting dental professionals and retailers directly as part of its recall notification process.