Adoxy LB Capsule is a combination of two medicines: Doxycycline and Lactobacillus. Doxycycline is an antibiotic medicine belonging to the class called "tetracyclines”. It is used to treat bacterial infections in many different parts of the body. On the other hand, Lactobacillus is a live microorganism which restores the balance of good bacteria in the intestine that may get upset with the use of antibiotics.