beware the deadly grapefruit!

"I think ... this woman's story is so unique it should not discourage people in any way from eating grapefruit," Grande said.

"Grapefruit is not a danger to society. It just happened to be dangerous for this specific person in this specific situation."

It's been known for nearly 20 years that grapefruit can trigger serious interactions with drugs. The person who first spotted the problem is Canadian pharmacologist David Bailey, who teaches at the University of Western Ontario.

In addition to having this congenitally narrow vein in her left hip, the woman was slightly overweight, took oral contraceptives and had driven for an extended period, about 1.5 hours, the day before the problem occurred.

All of those factors individually increased her risk of developing a blood clot, the authors said. And together they raised the risk even more.