Fewer veterans received prescriptions for risky dosages of opioid painkillers after a national initiative took aim at reducing high doses and potentially dangerous drug combinations, a new study finds. Over a two-year period, high-dose opioid prescribing declined by 16 percent, and very-high-dose opioid prescribing dropped by 24 percent. The number of patients receiving both opioids and sedatives, which can be lethal when combined, dropped by 21 percent.