Six herbal dentifrices were effective in inhibiting the growth of all four microorganisms. The positive control produced significantly sized inhibition zones with all four microorganisms, while the negative control produced no observable zones. Six herbal dentifrices produced larger inhibition zones with A. viscosus than did the positive control. Six herbal dentifrices were inhibitory against C. albicans at full strength, but at 1:1 dilution, only three had such inhibitory effect. One herbal dentifrice produced microbial growth around and over the samples, indicating possible microbial contamination of the toothpaste. Only one herbal dentifrice showed consistent antimicrobial activity against all four microorganisms.