Each 500mg tablet contains (methyl-5-benzol-benaimidizole-2-carbamate) and (dimethyl 2,2,2-trichloro-1-hydroxyethyl) phosphonate).
Organophosphates certainly do eliminate monogenetic trematodes, (e.g: Flukes), with varying effectiveness, but it is known that these Monogeneans can and DO develop resistance to the compounds. The unique, carbamate-pesticide portion of this compound is the important adjunct that enhances it's parasiticidal effect.It is recommended that you do a fifty percent water change after 48 hours, and re-treat after a 24 hour hiatus.