Negative in Ames, in vitro CHO chromosomal aberration and in vivo rat micronucleus assays
“Zavegepant was negative for mutagenicity and clastogenicity in an adequate battery of genetic toxicology (Ames, in vitro chromosomal aberration in Chinese hamster ovary cells, and in vivo rat micronucleus) assays.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Carcinogenicity
26-week Tg.rasH2 mouse and up to 96-week rat intranasal studies: no drug-related tumors
“Intranasal administration of zavegepant (0, 0.3, 0.8, or 2.5 mg/day) to Tg.rasH2 mice for 26 weeks resulted in no evidence of drug-related tumors. Intranasal administration of zavegepant (0, 2, 9, or 18.8 mg/kg/day) to rats for up to 96 weeks resulted in no evidence of drug-related tumors.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Instead of genotoxicity
Not stated in public reviews
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
DRG histopathology
Not stated in public reviews
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
Rat and rabbit studies: no reproductive or developmental toxicity at ≥2000-fold human exposure
“Reproductive and developmental toxicology studies were conducted in SD rat and New Zealand White rabbit. There were no reproductive or developmental toxicities at doses resulting in drug exposures at least 2,000-fold higher than human exposure (i.e., AUC) at the proposed clinical dose.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Safety pharmacology
No cardiovascular (monkey) or respiratory (rat) effects; hERG IC50 >30 µM
“There were no effects of BHV-3500 on cardiovascular or respiratory safety pharmacology endpoints in cynomolgus monkey or Sprague Dawley (SD) rat, respectively. The IC50 for hERG inhibition in transfected HEK293 cells was in excess of 30 µM.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Genotox: Ames
Negative
“BHV-3500 was negative in an adequately conducted Ames assay.”
✓ VerifiedFDA pharmacology/toxicology review, p. 39Source ↗
Genotox: in vitro mammalian
Chromosomal aberration in CHO cells: negative
“Zavegepant was negative for mutagenicity and clastogenicity in an adequate battery of genetic toxicology (Ames, in vitro chromosomal aberration in Chinese hamster ovary cells, and in vivo rat micronucleus) assays.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Genotox: in vivo
Rat micronucleus: negative
“Zavegepant was negative for mutagenicity and clastogenicity in an adequate battery of genetic toxicology (Ames, in vitro chromosomal aberration in Chinese hamster ovary cells, and in vivo rat micronucleus) assays.”
✓ VerifiedFDA pharmacology/toxicology review, p. 5Source ↗
Carcinogenicity model
26-week Tg.rasH2 mouse and 2-year SD rat (intranasal); both negative
“A 26-week study in Tg.rasH2 mouse and a 2-year study in SD rat were conducted to assess the carcinogenic potential of BHV-3500. Both studies were negative for carcinogenicity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Carcinogenicity timing
26-week rasH2 mouse and 2-year rat intranasal studies completed before the marketing application; both negative
“A 26-week study in Tg.rasH2 mouse and a 2-year study in SD rat were conducted to assess the carcinogenic potential of BHV-3500. Both studies were negative for carcinogenicity.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
hERG / QT
hERG and SCN5A IC50 >30 µM; no ECG or cardiovascular effects in telemetered monkeys
“The IC50 values for hERG/IKr and SCN5A channels in stably transfected HEK293 cells were in excess of 30 µM.”
✓ VerifiedFDA pharmacology/toxicology review, p. 15Source ↗
Not genotoxic overall: Ames negative; in vitro chromosome aberration positive without (not with) metabolic activation; rat micronucleus and comet negative