Diagnosis and treatment

Speaker of the House Nancy Pelosi, D-Calif., arrives for a closed-door meeting with the House Democratic Caucus, Wednesday, Sept. 18, 2019, at the Capitol in Washington. (AP Photo/J. Scott Applewhite)

FILE - In this Jan. 17, 2019, file photo, a sign with the Sackler name is displayed at the Metropolitan Museum of Art in New York. Their name used to be on a wing at the Louvre. But now the Sackler family wealth has become linked to sales of OxyContin, and their company, drug maker Purdue Pharma, is attempting to settle lawsuits over the opioid crisis. (AP Photo/Seth Wenig, File)

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FILE - In this Nov. 5, 2018 file photo, a drugstore employee reaches for medicine from shelf in downtown Tehran, Iran. A cheap, daily pill that combines four drugs has been tested for the first time in the United States to see if it works as well among low-income Americans as it has in other countries to treat conditions leading to heart attacks and strokes. The results published Wednesday, Sept. 18, 2019, suggest the combo pill can lower blood pressure and bad cholesterol. Experts say the study may draw U.S. interest to a strategy that has been seen as useful only in places with limited access to medical care. (AP Photo/Ebrahim Noroozi, File)

FILE - In this Thursday, Sept. 12, 2019 file photo, cars pass Purdue Pharma headquarters in Stamford, Conn. The allegations surrounding wealthy donors such as the Sackler family have raised questions for the museums they supported, including whether to keep the family's name on prominent galleries. The billionaire family is notorious for its ties to the drug company Purdue Pharma, which developed OxyContin, a painkiller that has been at the center of the opioid crisis. (AP Photo/Frank Franklin II, File)

FILE - This May 8, 2007, file photo shows the Purdue Pharma logo at its offices in Stamford, Conn. (AP Photo/Douglas Healey, File)

FILE - In this Aug. 17, 2018, file photo, Lynn Wencus of Wrentham, Mass., holds a sign with a picture of her son Jeff and wears a sign of others' loved ones lost to OxyContin and other opioids during a protest at Purdue Pharma LLP headquarters in Stamford, Conn. Some of the money in Purdue Pharma’s proposed multibillion-dollar opioid settlement would come from the continued sale of opioids. “It’s blood money paying for blood money,” said Wencus. “It’s ludicrous. The whole thing would be almost comical if we weren’t talking about human lives here.” (AP Photo/Jessica Hill, File)

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FILE - In this April 2, 2018, file photo, a pharmacist in San Francisco poses for photos holding a bottle of OxyContin. In court papers filed in New York on Sunday, Sept. 15, 2019, Purdue Pharma, the drug's manufacturer, flied for Chapter 11 bankruptcy protection. (AP Photo/Jeff Chiu, File)

FILE - This Feb. 19, 2013, file photo shows OxyContin pills arranged for a photo at a pharmacy in Montpelier, Vt. Purdue Pharma, the company which makes OxyContin and other drugs, filed court papers in New York on Sunday, Sept. 15, 2019, seeking Chapter 11 bankruptcy protection. (AP Photo/Toby Talbot, File)