Oil of oregano is good too.
Pau d'Arco is a S. A. herb - antibiotic and anti tumor, etc. Cured a friend's step throat, her Dad's infection which the "antibiotic" did not, etc. (He is employed by a major pharmaceutical company but now reaches for the P d"A first.) I've been using it for about four years - instead of pharmaceuticals which might prevent cancer but might cause......