Researchers at the Wyss Institute for Biologically Inspired Engineering at Harvard University report that they were able to successfully put tadpoles of Xenopus laevis frogs into a hibernation-like torpor state using donepezil (DNP), a drug approved by the FDA to treat Alzheimer’s. The team had previously used another drug, SNC80, to achieve similar results in tadpoles and enhance the survival of whole mammalian hearts for transplants, but SNC80 is not approved for clinical use in humans because it can cause seizures. By contrast, DNP is already being used in the clinic, meaning it potentially could be rapidly repurposed for use in emergency situations to prevent irreversible organ injury while a person is being transported to a hospital.