Health care company Fresenius Kabi has put in place a system of distribution controls to prevent its product from being used off-label for executions by lethal injection.
The UK Government will impose strict export controls on the anaesthetic propofol in response to the intention of American prisons to use the drug in executions.
The BMA's annual meeting has called for an end to the use of medicines in executions and for controls on the distribution and export of drugs used for this purpose.
A German drug company may become the prime supplier of execution drugs to the US following a decision by the State of Missouri to use propofol in lethal injections.