Potential bad news for audiophiles in need of pain relief.
https://www.sciencedaily.com/releases/2020/08/200817144112.htm
"Researchers identified 41 people with opioid exposure who experienced full or partial hearing loss or tinnitus, likely caused by toxicity to the ear. More than half had used heroin, followed by oxycodone, methadone and tramadol; 88 percent had only one known exposure."
https://www.sciencedaily.com/releases/2020/08/200817144112.htm
"Researchers identified 41 people with opioid exposure who experienced full or partial hearing loss or tinnitus, likely caused by toxicity to the ear. More than half had used heroin, followed by oxycodone, methadone and tramadol; 88 percent had only one known exposure."