Negative in a 6-assay battery including Ames, chromosome aberration and micronucleus assays
“No genotoxic potential was noted for triclabendazole tested in a battery of 6 genotoxicity in vitro and in vivo assays which include a bacterial reverse mutation assay, chromosome aberration assays, and a micronucleus assay.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reproductive & developmental
No fertility effects in rats; not embryotoxic in rat and rabbit EFD studies up to 200 and 20 mg/kg/day
“Orally administered TCBZ did not have effects on fertility in rats. Oral administration of TCBZ was not embryotoxic in rats and rabbits up to 200 and 20 mg/kg/day, which is 1.6 and 0.3 times the clinical dose respectively, based on a body surface area comparison.”
✓ VerifiedFDA multi-discipline review, p. 38Source ↗
Safety pharmacology
No stand-alone hERG assay; GLP dog cardiovascular study showed transient QTc prolongation at 100 mg/kg
“A GLP-compliant single-dose cardiovascular study in dogs indicated transient QTc interval prolongation in dogs after dosing with TCBZ at 100 mg/kg which is about 2.5 times the proposed clinical dose based on body surface area comparison.”
✓ VerifiedFDA multi-discipline review, p. 37Source ↗
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative