Public health experts say there are obstacles to getting these drugs, which are approved by the US Food and Drug Administration, widely distributed. Because methadone and buprenorphine are still opioids, who can prescribe and how much can be prescribed are highly regulated. In addition, treatment with these medications can require frequent visits with practitioners. “It’s really burdensome,” Hurd said.
‘So many people are dying’
For their study, published Tuesday in the American Journal of Psychiatry, Hurd and her colleagues looked at 42 adults who had a recent history of heroin use and were not using methadone or buprenorphine.
Recruited from social services groups, halfway houses and treatment centers, the participants had used heroin for an average of 13 years, and most had gone less than a month without using. They had to abstain from any heroin use for the entire trial period.
The participants were divided into three groups: one group given 800 milligrams of CBD, another 400 milligrams of CBD and another a placebo. All the participants were dosed once daily for three consecutive days and followed over the next two weeks.
During those two weeks, over the course of several sessions, the participants were shown images or videos of nature scenes as well as images of drug use and heroin-related paraphernalia, like syringes and packets of powder that resembled heroin. They were then asked to rate their craving for heroin and their levels of anxiety.
A week after the last administration of CBD, those who had been given CBD had a two- to three-fold reduction in cravings relative to the placebo group. Hurd said the difference between the two CBD groups was insignificant.
The research team also measured heart rate and cortisol, the “stress hormone,” and found that the levels in those who got CBD were significantly lower than those who hadn’t received the drug.
With many CBD products on the market now the exact concentration of CBD is uknown. In addition, they may have additives such as pesticides and even lead. But, Hurd said, with Epidiolex the exact concentration and other ingredients in the drug is known, which was key. “We are developing a medicine. We are not developing a recreational cannabis,” she said.
Participants reported very few bad reactions, such as mild diarrhea, headache and tiredness.
These findings are similar to those of a pilot study Hurd ran, but she says the next step is to do a longer-term study, following subjects for up to six months.
The study’s potential was not lost on others.
“CBD not only manages the anxiety and cue/craving cycle, it also diminishes the original pain and inflammation that leads to opiate use in the first place,” said Holland, who was not involved with the new study.
Hurd said there are still a lot of questions to answer in the next study, including the best dose, how many times it needed to be administered and the mechanism in the brain that is working to diminish the cravings.
But she was optimistic about the implications. “It’s not addictive. No one is diverting it. It doesn’t get you high, but it can reduce craving and anxiety,” she said. Ultimately, “this can really help save lives.”