Sodium thiopental is part of three - drug cocktail used in lethal injection . `` The imported thiopental in question has not been listed with FDA , was manufactured by foreign companies that have not registered with FDA , and was exported by a wholesaler located in the United Kingdom , '' says the lawsuit , filed in U.S. District Court in the District of Columbia . The U.S. manufacturer of the drug said last month it would stop making the drug . It states that using the drug in prison are asking feds if they will share their information . Meanwhile , six death row inmates are suing to stop imports they claim may be unsafe .
Sodium thiopental is part of three - drug cocktail used in lethal injection . The U.S. manufacturer of the drug said last month it would stop making the drug . It states that using the drug in prison are asking feds if they will share their information . Meanwhile , six death row inmates are suing to stop imports they claim may be unsafe .