A 35-year-old Cambridge man pleaded guilty to charges involving counterfeit pill manufacturing and COVID load fraud in federal court Tuesday.

Schuyler Oppenheimer, who also goes by the aliases “SK” and “Michael Sylvain,” pleaded guilty to one count of possession with intent to distribute 500 grams or more of methamphetamine and two counts of wire fraud, according to a statement from the U.S. Attorney’s Office.

Law enforcement seized from Oppenheimer recipes, pill press molds, and orders for pill fillers that could have made millions of pills, the statement said.

The US Attorney said that Oppenheimer communicated with “an illegal chemical supplier based in China,” asking about the availability of controlled substances and ingredients to make fentanyl.

“Oppenheimer sought to synthesize his own fentanyl through the importation of these fentanyl precursor chemicals into the United States,” the statement said.

During a July 2024 search warrant, they also seized more than five kilos of suspected counterfeit Adderall pills and a firearm which Oppenheimer was not allowed to possess because of prior felony convictions.

During a July 2024 search warrant, law enforcement seized more than five kilos of suspected counterfeit Adderall pills. (Courtesy of FBI Boston)

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In addition to the drug activity, Oppenheimer admitted to fraudulently obtaining $40,000 in loans from the Paycheck Protection Program, a COVID relief program. The US attorney said that Oppenheimer falsified tax records to accomplish the fraud.

He is expected to be sentenced on April 17. The drug charge comes with a sentence of at least tens years and up to life in prison and a fine of up to $10 million, while the fraud charges carry a maximum penalty of up to 20 years behind bars and a fine of $250,000.