In mice, no adverse effects were seen in doses of neratinib up to 2000 mg/kg. Single intraperitoneal dosing at 2000 and 700 mg/kg caused death, significant changes were noted as ptosis, soft faeces,mucoid faeces, decreased faeces, dehydration, coolness to the touch, decreased motor activity (grade1), low carriage, paleness, and tremors. Kidneys changes were significant in the mid and high doses.