In some cases, opioid-related deaths have risen sharply over the past few years.
In a recent study by researchers at the University of Pennsylvania, the number of opioid-induced overdose deaths in the United States jumped more than 200 percent in the first nine months of 2017.
The study also found that more than half of all opioid-associated deaths were caused by prescription painkillers.
Even though prescription painkiller prescriptions have been falling in recent years, they are still the second-most-popular opioid drug after heroin.
Last year, prescriptions for opioid-derived drugs were nearly 3.7 times the number in 2017, according to data from the Centers for Disease Control and Prevention.
The problem is especially acute in Texas, where a recent state survey found that nearly half of Texans are either taking an opioid painkiller or an opioid derivative.
The opioid crisis has also prompted some states to make it harder for people to get prescriptions for painkillers or other opioids.
The New York Times reported that California and New Jersey enacted new laws in 2017 that would make it more difficult for doctors to dispense opioid prescriptions.
And in a recent report by the National Institute on Drug Abuse, the agency said that prescription drug overdose deaths rose dramatically from 2016 to 2017, and were up 40 percent from 2016.