Lactinex

Lactinex is a brand name for a probiotic supplement used to replace microorganisms (gut flora) in the human intestines and colon. The brand is a registered trademark of Becton, Dickinson and Company. It may be used to treat diarrhea resulting from infection or when an antibiotic regimen destroys harmful bacteria and beneficial gut flora alike.^[1][2]

The principal ingredient is one or more bacteria from the genus Lactobacillus regularly found in unpasteurized milk products (a blend of Lactobacillus acidophilus and Lactobacillus helveticus (bulgaricus)).^[3] It is considered a dietary supplement and is not a prescription.^[4] The brand Lactinex requires refrigeration because it contains live microorganisms.^[5] Similar ingredients are also found in freeze dried varieties that do not require refrigeration.