Breast Cancer Clinical Trial
Official title:
Effect of Weight on the Population Pharmacokinetic Analysis of Doxorubicin and Cyclophosphamide
To determine the effect of weight on doxorubicin and cyclophosphamide plasma clearance in participants who are normal weight (body mass index [BMI] < 25 kg/m2, overweight or class I obese (BMI 25-34.9 kg/m2), or class II-III obese (BMI ≥ 35 kg/m2). The hypothesis is that participants who weigh more will have higher doxorubicin and cyclophosphamide clearances than participants who weigh less. Restated, the area under the drug-concentration time profile, also known as the AUC, in participants will decrease as participant weight increases.
This single site study will be conducted at the UT Southwestern Simmons Cancer Center. This
study is designed to measure drug concentrations in the blood of 18 female breast cancer
patients who require doxorubicin (30 minute infusion) and cylcophosphamide (30 minute
infusion) as part of standard medical care. Up to a total of 40 adult female participants
will be consented for the study at the cancer center. Eighteen of these participants are
needed to complete the study. The others will likely be screen failures. The participants
will have no more than 100 ml of blood drawn via a peripheral intravenous catheter just prior
to the doxorubicin infusion, and then at 0.5, 1, 1.5, 2, 3, 4, 5, 12-24, and 24-72 h after
the beginning of the doxorubicin infusion. The 5 hour blood draw is optional. The intravenous
catheter will be removed when the participant is discharged from the cancer center on day 1.
The participant will be asked to return to the cancer center at 12-24 and 24-72 hours to have
the final 2 blood draws conducted.
The participants must be treated with Doxurubicin and Cyclophosphamide in order to
participate in this pharmacokinetic analysis study.
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