Your best bet would be to find them online if you do not have a health food store that carries them. Pau d' arco (lapacho, taheebo, ipe roxo) is a South American herb. Andrographis is a Chinese herb. I also really like chaparral, which increases the effectiveness of the pau d' arco. Chaparral is usually derived from Mexico or the Southwest US. It is a little harder to obtain though.