A Quincy resident has agreed to plead guilty after being charged with injecting clients at his business, Rodrigo Beauty Inc., with unapproved botulinum toxin sourced from outside the United States. The actions allegedly resulted in several severe cases of botulism among clients.
Rodrigo de Medeiros Siqueira, 33, faces one count of misbranding a drug after shipment in interstate commerce with intent to defraud or mislead. A plea hearing date has not yet been set. He was previously arrested and charged by complaint in October 2025.
According to court documents, starting around August 2022, Medeiros Siqueira offered cosmetic injection procedures at Rodrigo Beauty despite lacking the necessary medical license to prescribe or administer prescription drugs. Authorities allege he falsely claimed to be a licensed medical professional and provided misleading information about the identity and source of the botulinum toxin used in client injections. From late May 2025 onward, multiple clients were diagnosed with botulism following these procedures.
Botulism is a rare but serious illness that can result from improper use of botulinum toxin, especially when administered by individuals without appropriate training or using non-FDA-approved products. Symptoms may include blurred vision, drooping eyelids, slurred speech, and difficulty swallowing or breathing.
The charge carries a maximum sentence of three years in prison, one year of supervised release, and a fine up to $250,000 or twice the gross gain or loss from the offense. Sentencing will be determined by a federal district court judge according to U.S. Sentencing Guidelines.
Clients who believe they received illegal injections or unapproved drugs from Medeiros Siqueira or Rodrigo Beauty are encouraged to complete an online questionnaire on the FDA’s website at https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/criminal-investigations/oci-vw-assistance-rodrigo-beauty. Updates on the case status are available at https://www.justice.gov/usao-ma/victim-and-witness-assistance-program/united-states-v-rodrigo-de-medeiros-siqueira.
United States Attorney Leah B. Foley stated: “The details contained in the charging documents are allegations. The defendant is presumed innocent unless and until proven guilty beyond a reasonable doubt in a court of law.” Fernando McMillan, Special Agent in Charge of the Food and Drug Administration’s Office of Criminal Investigations New York Field Office also participated in announcing the charges. Assistant U.S. Attorney Leslie A. Wright is prosecuting the case.
