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Dosing Down to a Science

OnDose is a simple blood test that helps oncologists to optimize infusional 5-FU therapy on an individual basis. OnDose provides the data for pharmacokinetically-guided dose adjustments of infusional 5-FU to help optimize dosing for patients with colorectal cancer.

In a phase 3, multicenter, randomized study (N=208), optimized dosing demonstrated proven benefits for both efficacy and toxicity.1

  • Provided significantly greater objective response rates (33.7% versus 17.3% with body surface area [BSA]-based dosing; P=.004)1




  • Despite having higher mean doses of 5-FU,* patients experienced significantly less toxicity (P=.003)1
    • Patients experienced a 78% reduction in grades 3/4 diarrhea1




  • Optimized dosing demonstrated a trend toward increased median survival1
    • 22 months versus 16 months with BSA-based dosing (P=.08)1


With OnDose, dosing can be as individual as your patients

The OnDose Results Report (click image below to download a sample) is designed to provide you with an accurate and timely measurement of infusional 5-FU exposure in patients with colorectal cancer. The test results are used to help optimize an individualized dose for the next cycle and help guide your patients' doses into a clinically established target area under the curve range (20-24 mg•h/L).



Reference: 1. Gamelin E, Delva R, Jacob J, et al. Individual fluorouracil dose adjustment based on pharmacokinetic follow-up compared with conventional dosage: results of a multicenter randomized trial of patients with metastatic colorectal cancer. J Clin Oncol. 2008;26(13):2099-2105.

View information recently presented during the 2010 ASCO Gastrointestinal Cancers Symposium



Extensive 5-FU inter-patient pharmacokinetic variability may result in suboptimal 5-FU dosing of metastatic and adjuvant colon cancer patients on FOLFOX regimens





   OnDose Professional Slide Set





Myriad Genetic Laboratories, Inc.
320 Wakara Way, Salt Lake City, UT 84108

1-800-469-7423 | E-mail: ondose@myriad.com
Myriad, the Myriad logo, OnDose, and the OnDose logo are either trademarks or registered trademarks of Myriad Genetics, Inc., in the United States and other jurisdictions.

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