Pima health officials warn potent carfentanil found in Tucson's illicit pill supply https://www.tucsonsentinel.com/local/report/051315_carfentanil_tucson/pima-health-officials-warn-potent-carfentanil-found-tucsons-illicit-pill-supply/
Carfentanil, a synthetic opioid intended for elephants and far more potent than fentanyl, was recently found in a stash of blue "M30" pills seized by Tucson police officers, Pima County officials warned local health providers.
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