More details have emerged about the medical emergency Prince suffered in the week prior his death. According to TMZ, Prince’s overdose and subsequent hospitalization in Moline, Illinois, last week was brought on by his use or overuse of Percocet, an opioid combination of acetaminophen and oxycodone that is used to treat moderate to severe pain. The singer was allegedly “unresponsive” during his plane’s emergency landing, which called ahead with a report concerning an “unresponsive male” aboard. Prince was subsequently treated in the airport by emergency medical personnel who administered an opiate antidote, or “save shot.” After being hospitalized for three hours, Prince left to return to Paisley Park in Minnesota. The singer’s autopsy is scheduled to be performed today.