Non-dose-related lower spleen and thymus weights in monkey without histopathological correlates
“There were increases in the weight of adrenal glands, thyroid/parathyroid, and ovaries and decreases in spleen and thymus in BHV-3500 groups; however, the changes were not dose-related, and there were no histopathological correlates.”
✓ VerifiedFDA pharmacology/toxicology review, p. 32Source ↗
Biodistribution & persistence
Minimal CNS penetration: plasma:olfactory bulb 500:1 and plasma:trigeminal nerve 180:1 after intranasal dosing in rat
“Following intranasal administration of 14C-zavegepant to rats, plasma:olfactory bulb and plasma:trigeminal nerve radioactivity ratios were 500:1 and 180:1, respectively, at 0.5 hours postdose.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗
Modality-specific risk
Local nasal cavity epithelial toxicity (degeneration/regeneration, inflammation) with intranasal dosing
“Local toxicity (nasal cavity epithelium degeneration/regeneration, subacute inflammation) was observed at all doses in the 13-week study, which resulted in lower doses being used in the 26-week study.”
✓ VerifiedFDA pharmacology/toxicology review, p. 3Source ↗