Buprenorphine is one of just three federally approved medications to treat opioid addiction. It’s possible to misuse it because it’s an opioid itself — people snort or inject the medication to get high. And patients with prescriptions can sell or give it away, which is known as diversion. But addiction treatment professionals argue the problem of buprenorphine diversion is often misunderstood. The black market exists, in part, because addiction treatment can be hard to find, and the availability of the drug on the street can be helpful, they say.

Doctors who can prescribe a medication for opioid addiction, and accept Medicaid, are already scarce. But even fewer will treat pregnant women. At this most vulnerable time, when both mother’s and baby’s lives are at stake, some doctors even drop their patients.

Addiction experts are up in arms following remarks from Health and Human Services Secretary Tom Price, in which he referred to medication-assisted treatment for addiction as “substituting one opioid for another.” Nearly 700 researchers and practitioners sent a letter Monday communicating their criticisms to Price and urging him to “set the record straight.”