"We didn't discuss dosage. That didn't matter to me — I just wanted to get it out of my system," she said of the cancer, and praised the treatments to prevent one of chemo's most feared side effects. "There are fantastic anti-nausea medicines. I was never sick one day."
McRath is active in the Obesity Action Coalition, an education and advocacy group. A spokesman said the group was unaware of the dosing issue for obese patients.
Not all doctors are aware either. Luckily for McRath, hers was. Peterson said she uses full doses unless a patient has other health issues.
"If that's their only problem — if they're just overweight or obese — they can do quite well" with full weight-based doses, she said.
Duke's Lyman agreed, and offered this advice to patients: "Ask your doctor how they plan to treat you and whether you're going to get the full dosing. The doctor may have a good reason not to, but you should have that discussion."
AP National Writer Allen G. Breed in Raleigh, N.C., contributed to this report.
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