DALLAS -- Texas prison officials have changed their procedure for administering executions to a one-drug cocktail.
The Texas Department of Criminal Justice said in a statement to The Associated Press Tuesday that it would use just pentobarbital in executions instead of a three-drug combination. Department spokesman Jason Clark says the agency changed its protocol July 9 because its stock of one of the three drugs expired.
Pentobarbital is a sedative that is typically the first drug administered. The department says it has run out of the second drug, pancuronium bromide.
TDCJ officials said in May that it had enough doses of pentobarbital for as many as 23 executions.
Last year, officials used pentobarbital to replace sodium thiopental, which became unavailable when its European supplier stopped making it under pressure from death penalty opponents.