According to Wikipedia:

“As a drug, berberine has showed some activity against fungal infections, candida, yeast, parasites, and bacterial/viral infections. Some research has been undertaken into possible use against MRSA infection. Although berberine has been tested and used in diabetes, prostate cancer cell lines, liver and leukaemia cancers, cardiac arrhythmia, and leukemia, it has not been researched thoroughly with humans. Berberine is considered an ineffective antibiotic, but a minority claim that when not tested in isolation but in conjunction with the other biochemical substances from the barberry plant, berberine might then be effective.”

To know more abour berberine, visit Wikipedia website.