Case series describes possible severe withdrawal syndrome in 23 patients using illegal opioids in Pittsburgh

A descriptive field report and case series documented 23 patients who sought treatment at hospitals in Pittsburgh, Pennsylvania, after using illegally manufactured opioids. The report described a possible severe withdrawal syndrome, with all 23 patients experiencing this possible syndrome. No specific effect size, comparator group, or primary outcome was reported.

Safety and tolerability data, including adverse events, serious adverse events, and discontinuations, were not reported. The follow-up duration was also not reported. The report's funding sources and potential conflicts of interest were not disclosed.

Key limitations include the descriptive, observational nature of the evidence, which reports an association and does not establish causation. The small sample from a single geographic area limits generalizability. The effect size and specific clinical characteristics of the syndrome were not quantified. For practice, this report serves as an early alert about a possible clinical presentation associated with illegal opioid use, but the evidence is insufficient to guide specific management changes.