Waking the dead?

California Department of Public Health
Rarely does a governmental report make our heart race, but this mysterious footnote was a jolt:
“From 2016 to 2022,” said California’s most recent dispatch on medical-aid-in-dying prescriptions and passings, “7 individuals regained consciousness after ingestion. No individuals regained consciousness in 2023 and 2024.”
What?
Seven terminally ill people drank the potion that was supposed to end their lives and…woke up? How