Disclosed are methods of improving the symptoms of mammals suffering from BPH using compositions containing one or more antibiotics. The method includes, but is not limited to, administering at least one antibiotic in one or more courses of treatment by one or more administration routes selected from intramuscularly, orally, intravenously, intrathecally, intratumorally, intranasally, topically, and transdermally, either alone or with a carrier to a mammal in need thereof.