“Brain-to-plasma ratios were ≤0.01, suggesting zongertinib showed minimal crossing of the blood-brain barrier in rats. Zongertinib was detected for up to ~200 hours in the total eyeball, and up to ~470 hours in the melanin-containing region of the ocular bulb of the eye”
✓ VerifiedFDA multi-discipline review, p. 47Source ↗
Modality-specific risk
Oral mucosal lesions in dogs at subclinical exposure (≥0.3x human AUC)
“In the 4-week repeat-dose toxicology study in dogs, zongertinib induced redness and lesions of the oral mucosa (hard palate, buccal mucosa, tongue, lips) at doses ≥10 mg/kg/day (≥0.3 times the human exposure based on AUC at the recommended dose)”
✓ VerifiedFDA multi-discipline review, p. 48Source ↗