Dr. Ed Greeno says it hasn't happened yet.
But the cancer specialist at the University of Minnesota said he lives in fear of having to tell a patient: "We can't get the best drug, so we have to settle for something that's not as good."
On Wednesday, Greeno joined Sen. Amy Klobuchar, D-Minn., at a news conference to voice concern about a growing shortage of prescription drugs, including morphine and cisplatin, a widely used cancer drug.
According to Klobuchar, 150 drugs are now considered in short supply in the United States -- twice as many as five years ago. As a result, she said, she plans to introduce legislation to speed up the availability of substitutes, including comparable drugs from other countries.
"Fortunately in Minnesota, we haven't had any serious adverse results yet," she said at the news conference at Fairview Southdale Hospital in Edina. "But there's absolutely no doubt that there's been an increasing shortage of drugs."
In the past few weeks, hospitals and clinics in Minnesota and around the country have had to scramble for adequate supplies of key medications.
The shortages have been blamed, in part, on production problems as well as decisions by drug manufacturers to stop making inexpensive generic drugs. In addition, a California plant that manufactures cisplatin was shut down by federal authorities earlier this year because of concerns about bacterial contamination.
Klobuchar said her legislation, which she hopes will draw bipartisan support, would require drug manufacturers to warn the Food and Drug Administration of impending shortages, and to ease rules on importing drugs from Canada and other countries.