Negative in Ames, in vitro human lymphocyte micronucleus and in vivo rat bone marrow micronucleus assays
“Brexanolone was not genotoxic when tested in an in vitro microbial mutagenicity (Ames) assay, an in vitro micronucleus assay in human peripheral blood lymphocytes, and an in vivo rat bone marrow micronucleus assay.”
“Brexanolone was not assessed for carcinogenicity because the treatment of PPD with brexanolone infusion is considered acute.”
✓ VerifiedFDA multi-discipline review, p. 33Source ↗
Reproductive & developmental
Rat and rabbit EFD: no malformations up to 5-6x MRHD; developmental toxicity at 5x (rat) and >=3x (rabbit)
“In animal reproduction studies, malformations were not seen in rats or rabbits at plasma levels up to 5 and 6 times the maximum recommended human dose (MRHD), respectively. Developmental toxicities were seen in the fetuses of rats and rabbits at 5 and ≥3 times the plasma levels at the MRHD, respectively.”
CNS (rat FOB) and cardiovascular/respiratory (dog) endpoints embedded in 14-day toxicology studies
“CNS safety pharmacology was evaluated as part of the 14-day rat toxicology study using a Functional Observation Battery (FOB). Cardiovascular and respiratory safety pharmacology was evaluated as part of the 14-day dog toxicology study”
✓ VerifiedFDA multi-discipline review, p. 39Source ↗
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative