The city’s largest illegal prescription-pill ring — which peddled $1 million of the drugs a year, mainly to students and yuppies — has been busted, Brooklyn DA Charles Hynes said yesterday.

Among those busted were Pinchas Goldshtein, 26, of Brooklyn, who is charged with buying tens of thousands of pills that included the stimulant Adderall and painkillers OxyContin and Percoset.

He then allegedly distributed them to wholesale dealers Miguel Medina, 45, of The Bronx, Evan Vaughn, 28, of Manhattan and Henry C. Fertik, 23, of Brooklyn.