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More than 11 million Americans prescribed wrong dose of common drugs, scientists say

Fiza Pirani
By Fiza Pirani

More than 11 million people in the United States may have been given the wrong prescription dose for common drugs, according to scientists from the Stanford University School of Medicine.

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The researchers analyzed the reliability of updated pooled cohort equations, guidelines often used as online web tools that help doctors determine a patient’s risk of stroke or heart attack.

When patients walk into the doctor’s office, their risks are automatically calculated using PCEs and uploaded to electronic health records. Based on the data, doctors decide whether to prescribe aspirin, blood pressure or statin medications — and how much.

"A lot has changed in terms of diets, environments and medical treatment since the 1940s," Basu said in a university article. "So, relying on our grandparents' data to make our treatment choices is probably not the best idea."

The data also didn’t have a sufficient sample of African-Americans, suggesting physicians may have been inaccurately assessing the group’s risks of heart attacks or strokes as too low.

Basu and his team believe the statistical methods, in addition to the data sets, also need to be upgraded to improve the accuracy of risk estimates.

The findings were published in the Annals of Internal Medicine on June 5.