Florastor is a product line of probiotics containing a single strain of Saccharomyces boulardii lyo. However, it is contraindicated for use in patients with a yeast allergy and those with a central line, including both short- and long-term central venous catheters (CVCs). This contraindication is also emphasized in the safety instructions and warnings, and the medicine should not be used if the patient has a weak immune system, lactose intolerance, dehydration, or a central IV line. There have been instances of contamination when using this medicine, potentially due to catheter contamination. It is important for patients with a compromised health status and those with a central venous catheter to avoid using this medicine.