A drug with a long and contested history in capital punishment is facing renewed scrutiny after Tennessee’s failed attempt to execute death row inmate Christa Pike using two doses of pentobarbital left her alive and hospitalized.
Pike, 50, survived the procedure Wednesday after witnesses and her attorneys confirmed that two full doses of the barbiturate were administered without causing her death. Her legal team confirmed Thursday that she was receiving medical care at a hospital though her exact condition remained unknown.
Tennessee officials have not yet publicly explained what went wrong during the execution. Republican Governor Bill Lee has ordered an independent third-party investigation into the incident and announced that a separate execution scheduled in the state would not proceed this year.
Pentobarbital is a central nervous system depressant used medically for sedation, short-term insomnia treatment and emergency seizure control. In veterinary settings it is commonly used for euthanasia and in overdose quantities it can suppress breathing and cause fatal circulatory collapse.
The drug became a preferred method for executions after the traditional three-drug lethal injection protocol drew criticism and pharmaceutical companies began restricting access to those drugs. Both Tennessee and the federal government adopted a 5-gram pentobarbital protocol far exceeding the fraction-of-a-gram doses used in medical settings.
President Donald Trump revived federal executions during his first term and the government carried out 13 executions using pentobarbital between 2020 and 2021. The Biden administration later paused federal executions after a government review raised concerns about the potential for unnecessary pain and suffering during pentobarbital administration.
Trump’s Justice Department reauthorized pentobarbital-based lethal injections in 2026 after he returned to office. Texas and Georgia use protocols similar to Tennessee’s while South Carolina automatically administers two doses spaced roughly ten minutes apart.
Medical experts cited in the 2025 federal review warned that pentobarbital may trigger pulmonary edema causing a buildup of fluid in the lungs that could produce a sensation of drowning. The review concluded there remains significant uncertainty about whether the drug causes unnecessary suffering. Other specialists cited by the Trump administration argued that a lethal dose renders inmates unconscious before any such sensation could occur.
Wednesday’s failed execution is believed to be the first documented case of pentobarbital failing to cause death during an execution. In past problematic lethal injection cases problems typically arose from IV insertion failures or the use of untested drug combinations rather than a failure of the drug itself.