Houttuynia is an extract of the herb of Houttuynia cordata. Houttuynia cordata is a Chinese medicinal herb that is found throughout Eastern Asia. It has been used traditionally to treat various types of infections, inflammation, hypertension, sinusitis, pulmonary tuberculosis, etc. Dr. James Schaller has found Houttuynia to be effective against Bartonella in vitro and in vivo and Dr. Lee Cowden has found Houttuynia to be effective against Bartonella clinically in patients who have resistant strains of Bartonella