The case originated on April 15, when Hospital Italiano de La Plata detected patients infected with the adulterated medication. Of 18 confirmed cases, 15 resulted in death. On May 2, ANMAT banned the batch identified as "FENTANILO HLB / CITRATO DE FENTANILO, batch 31202", and days later the measure was extended to the entire production of the laboratories involved.
In addition to the contamination, the judicial investigation, led by federal judge of La Plata Ernesto Kreplak, is investigating other irregular acts linked to HLB Pharma, such as the incineration of five kilograms (11 pounds) of expired fentanyl on April 13—the same day the case was initiated—and allegations of tax evasion, illegal importation of machinery from China, and document forgery.











