At US hospitals, a drug mix-up is just a few keystrokes away

More than four years ago, Tennessee nurse RaDonda Vaught typed two letters into a hospital’s computerized medication cabinet, selected the wrong drug from the search results, and gave a patient a fatal dose.

Vaught was prosecuted this year in an extremely rare criminal trial for a medical mistake, but the drug mix-up at the center of her case is anything but rare. Computerized cabinets have become nearly ubiquitous in modern health care, and the technological vulnerability that made Vaught’s error possible persists in many U.S. hospitals.

Since Vaught’s arrest in 2019, there have been at least seven other incidents of hospital staffers searching medication cabinets with three or fewer letters and then administering or nearly administering the wrong drug, according to a KHN review of reports provided by the Institute for Safe Medication Practices, or ISMP. Hospitals are not required to report most drug mix-ups, so the seven incidents are undoubtedly a small sampling of a much larger total.

Safety advocates say errors like these could be prevented by requiring nurses to type in at least five letters of a drug’s name when searching hospital cabinets. The two biggest cabinet companies, Omnicell and BD, agreed to update their machines in line with these recommendations, but the only safeguard that has taken effect so far is turned off by default.

“One letter, two letters, or three letters is just not enough,” said Michael Cohen, the president emeritus of ISMP, a nonprofit that collects error reports directly from medical professionals.

“For example, [if you type] M-E-T. Is that metronidazole? Or metformin?” Cohen added. “One is an antibiotic. The other is a drug for diabetes. That’s a pretty big mix-up. But when you see M-E-T on the screen, it’s easy to select the wrong drug.”

A Five-Letter Fix: Making It Stick

Omnicell added a five-letter search with a software update in 2020. But customers must opt in to the feature, so it is likely unused in many hospitals. BD, which makes Pyxis cabinets, said it intends to make five-letter searches standard on Pyxis machines through a software update later this year — more than 2½ years after it first told safety advocates the upgrade was coming.

That update will be felt in thousands of hospitals: It will be much more difficult to withdraw the wrong drug from Pyxis cabinets but also slightly more difficult to pull the right one. Nurses will need to correctly spell perplexing drug names, sometimes in chaotic medical emergencies.

Robert Wells, a Detroit emergency room nurse, said the hospital system in which he works activated the safeguard on its Omnicell cabinets about a year ago and now requires at least five letters. Wells struggled to spell some drug names at first, but that challenge is fading over time. “For me, it’s become a bigger hassle to pull drugs, but I understand why they went there,” Wells said. “It seems inherently safer.”

Computerized medication cabinets, also known as automated dispensing cabinets, are the way almost every U.S. hospital manages, tracks, and distributes dozens to hundreds…