In 2016, news reports warned the public of an opioid epidemic gripping the nation.

But Madeline Vaughn, then a lead clinical intake coordinator at the Houston-based addiction treatment organization Council on Recovery, sensed something different was going on with the patients she checked in from the street.

Their behavior, marked by twitchy suspicion, a poor memory and the feeling that someone was following them, signaled that the people coming through the center’s doors were increasingly hooked on a different drug: methamphetamine.

“When you’re in the boots on the ground,” Vaughn said, “what you see may surprise you, because it’s not in the headlines.”

In the time since, it’s become increasingly clear that, even as the opioid epidemic continues, the toll of methamphetamine use, also known as meth or crystal meth, is on the rise, too.

The rate of overdose deaths involving the stimulant more than tripled from 2011 to 2016, the Centers for Disease Control and Prevention reported.

But unlike the opioid epidemic — for which medications exist to help combat addiction — medical providers have few such tools to help methamphetamine users survive and recover. A drug such as naloxone, which can reverse an opioid overdose, does not exist for meth. And there are no drugs approved by the Food and Drug Administration that can treat a meth addiction.

“We’re realizing that we don’t have everything we might wish we had to address these different kinds of drugs,” said Dr. Margaret Jarvis, a psychiatrist and distinguished fellow for the American Society of Addiction Medicine.