According to the definition posted on drugs.com, this probiotic supplement that combines both Bifidobacterium and lactobacillus is used to “maintain a healthy digestive tract”. Besides, it may also help “maintain healthy bacteria in the vagina”. Sold under the brand name Provella, Bifidobacterium-lactobacillus is mainly used in people with irritable bowel syndrome (a condition that prevents food from moving through your intestines normally). This medical food is also used in people who have ulcerative colitis, or an ileal pouch. If you are lactose intolerant, you may want to consult your doctor before using Bifidobacterium-lactobacillus, to make sure that this probiotic supplement will be safe for you. You’ll also need to call your doctor right away if your symptoms get worse while using Bifidobacterium-lactobacillus. As far as the side effects are concerned, they include allergic reactions and stomach discomfort. You should ask your doctor if you can use this product during pregnancy in order to make sure that it won’t harm you or your baby.