Sterile. Relieves dry and irritated eyes. Compare to the active ingredients in Murine Tears (This product is not manufactured or distributed by Prestige Brands, Inc. owner of the registered trademark Murine Tears). Rx - Our pharmacists recommend. Quality guaranteed or your money back. For product questions or concerns, contact us at 1-877-846-9949. Other information: Store at 59 degrees - 86 degrees F (15 degrees - 30 degrees C). Keep outer carton for complete warnings and product information.