A Quincy, Mass. man pleaded guilty in federal court in Boston to injecting clients of his business, Rodrigo Beauty Inc., with unapproved botulinum toxin obtained from illegitimate sources outside the United States, resulting in numerous severe cases of botulism. Rodrigo de Medeiros Siqueira, 33, pleaded guilty to one count of misbranding of a drug after shipment in interstate commerce with the intent to defraud or mislead. Beginning in or around August 2022, Medeiros Siqueira offered various cosmetic injection procedures, including the injection of botulinum toxin prescription drugs, to clients of Rodrigo Beauty, despite not being licensed to prescribe, dispense, or administer prescription drugs or perform injections. Medeiros Siqueira falsely represented to clients that he was a licensed medical professional authorized to perform injections and made false statements to clients regarding the identity and source of the botulinum toxin products he was using for their injection procedures. Beginning in or around late May 2025, numerous Rodrigo Beauty clients were diagnosed with botulism as a result of injections Medeiros Siqueira performed using unapproved botulinum toxin.