Lactobacillus acidophilus is a probiotic that is used to help maintain the number of healthy bacteria in your stomach and intestines. This supplement is available without a prescription. This product is available in the following dosage forms:

The probiotic mixture might lessen how much people taking antibiotics have diarrhea related to Clostridioides difficile, called C. difficile, infection. But more research needs to be done.

Safe daily dosages of acidophilus depend upon the reason for treatment. Those attempting to prevent diarrhea can take 1 to 2 billion colony-forming units daily, or CFUs, although the UMMC notes that some health care providers may recommend up to 10 to 15 billion cells daily.

Acidophilus (lactobacillus acidophilus) is a bacteria naturally found in your digestive system, urinary tract and other parts of your body. Acidophilus may be used as a probiotic to promote the growth of good bacteria in your body.

Enteric-coated capsules containing Lactobacillus acidophilus and L. casei: 1 capsule daily for the first 2 weeks of therapy; dosage may then be increased up to a maximum of 3 capsules daily if necessary.