A white tablet containing a nitazene (protonitazene) has caused severe opioid overdose in Sydney7 Feb 2025NSWLSD Nitazenes Opioids PsychedelicsA severe opioid overdose has occurred after taking a white tablet. The tablet was described as containing LSD or magic mushroom. Blood tests detected protonitazene, a potent synthetic opioid. Know the risks Effects to look out for Getting help Take Home Naloxone program Support and advice For free and confidential advice:Read notification