Eugene I. Lambert, 77, a former partner at Washington’s Covington & Burling law firm who specialized in food-and-drug law, died March 29 at Sibley Memorial Hospital in the District.

He had prostate cancer, his wife, Janet Lambert, said.

Mr. Lambert, a Chevy Chase resident, spent his entire career at Covington & Burling, which he joined in 1961. He was a full partner of the firm and, at the time of his death, was a senior counsel. He specialized in the regulation of food and drugs for animals and was also expert in the fields of human food, over-the-counter drugs and cosmetics.

Eugene Isaak Lambert was born in Queens, N.Y., and grew up in Washington. He graduated from Coolidge High School and was a 1957 graduate of George Washington University, where he was a member of the Sigma Nu fraternity. He graduated from Yale Law School in 1960 and was managing editor of the Yale Law Journal.

Mr. Lambert served on the board of trustees of George Washington University and was a past president of the university’s alumni association. He taught at various law schools over the years, most recently at American University.

His first wife, Justine Levin Lambert, died in 1981 after 21 years of marriage.

Survivors include his wife of 29 years, Janet Verner Platt Lambert of Chevy Chase; three children from his first marriage, Ken Lambert of Seattle, Kathryn Lambert of Peoria, Ill., and Jocelyn Lambert of Groton, N.Y.; and two grandsons.

Matt Schudel