[jacquesm]

Yes, this is the key item. In vitro there has been some success but at dosage far higher (double digits) than what the safe dose is, and no in vivo trial has been done at those dosages (and likely never will due to the risks involved).

[6nf]

This is not correct, the dosage recommended now is 0.2mg/kg which is just the standard treatment dose when used for parasites.