BOSTON -- A Truro man claims Vietnamese food was to blame when he blacked out at the wheel and his vehicle struck and killed a preschool teacher on the Cape two years ago.

David Gilman, 64, was driving on Route 6 on Nov. 9, 2007, when his vehicle struck and killed Edith Sweet, 55, according to the Cape Cod Times.

The case is scheduled to go to trial in September, and Gilman may argue that monosodium glutamate, also known as MSG, caused him to black out and drift across a double line, the newspaper reported.

He is charged with motor vehicle homicide by negligent operation, negligent operation of a motor vehicle and a marked lanes violation.

Gilman ate Vietnamese food several times in the weeks before the crash. His physician, Dr. Walter Lee, said that MSG can cause headaches, rapid heart rates and dizziness.

At the time of the crash, Gilman was taking the anti-seizure medicine Phenobarbital. Lee said the MSG in the food may have interacted with the medicine.

For more than 15 years, Gilman has taken Phenobarbital and Dilantin to control petit mal seizure disorder, according to the Times.

The case is scheduled to begin on Sept. 29 in Orleans District Court.