Dosing modification1
Dose Management Guidelines
Optimizing outcomes by individualizing dosing
XELODA dosage may need to be individualized to optimize patient management. Patients should be carefully monitored for toxicity and doses of XELODA should be modified as necessary to accommodate individual patient tolerance to treatment. Toxicity due to XELODA administration may be managed by symptomatic treatment, dose interruptions and adjustment of XELODA dose. Once the dose has been reduced, it should not be increased at a later time. Doses of XELODA omitted for toxicity are not replaced or restored; instead the patient should resume the planned treatment cycles.
The dose of phenytoin and the dose of coumarin-derivative anticoagulants may need to be reduced when either drug is administered concomitantly with XELODA.
Monotherapy
(Metastatic Colorectal Cancer, Adjuvant Colorectal Cancer,Metastatic Breast Cancer)
XELODA dose modification scheme as described below is recommended for the management of adverse reactions.
Recommended Dose Modifications of XELODA
| Toxicity NCIC Grades* |
During a Course of Therapy | Dose Adjustment for Next Treatment (% of Starting Dose) |
| Grade 1 | Maintain dose level. | Maintain dose level. |
| Grade 2 | ||
| 1st appearance | Interrupt until resolved to grade 0-1. | 100% |
| 2nd appearance | 75% | |
| 3rd appearance | 50% | |
| 4th appearance | Discontinue treatment permanently. | — |
| Grade 3 | ||
| 1st appearance | Interrupt until resolved to grade 0-1. | 75% |
| 2nd appearance | 50% | |
| 3rd appearance | Discontinue permanently. | — |
| Grade 4 | ||
| 1st appearance | Discontinue permanently
OR If physician deems it to be in the patient's best interest to continue, interrupt until resolved to grade 0-1. |
50% |
*National Cancer Institute of Canada Common Toxicity Criteria were used, except for the hand-and-foot syndrome.
In Combination with Docetaxel (Metastatic Breast Cancer)
Dose modifications of XELODA for toxicity should be made according to the above chart for XELODA. At the beginning of a treatment cycle, if a treatment delay is indicated for either XELODA or docetaxel, administration of both agents should be delayed until the requirements for restarting both drugs are met.
The dose reduction schedule for docetaxel when used in combination with XELODA for the treatment of metastatic breast cancer is shown below.
Docetaxel Dose Reduction Schedule in Combination with XELODA
| Toxicity NCIC Grades* |
Grade 2 | Grade 3 | Grade 4 |
| 1st appearance | Delay treatment until resolved to grade 0-1; resume treatment with original dose of 75 mg/m2 docetaxel. | Delay treatment until resolved to grade 0-1; resume treatment at 55 mg/m2 of docetaxel. | Discontinue treatment with docetaxel. |
| 2nd appearance | Delay treatment until resolved to grade 0-1; resume treatment at 55 mg/m2 of docetaxel. | Discontinue treatment with docetaxel | — |
| 3rd appearance | Discontinue treatment with docetaxel. | — | — |
*National Cancer Institute of Canada Common Toxicity Criteria were used, except for hand-and-foot syndrome.
Adjustment of Starting Dose in Special Populations
Renal Impairment
No adjustment to the starting dose of XELODA is recommended in patients with mild renal impairment (creatinine clearance = 51 to 80 mL/min [Cockroft and Gault,
as shown below]). In patients with moderate renal impairment (baseline creatinine clearance = 30 to 50 mL/min), a dose reduction to 75% of the XELODA starting
dose when used as monotherapy or in combination with docetaxel (from 1250 mg/m2 to 950 mg/m2
twice daily) is recommended and Clinical Pharmacology. Subsequent dose adjustment is
recommended as outlined in Table 2 and Table 3 (depending on the regimen) if a patient develops a grade 2 to 4 adverse event. The starting dose adjustment recommendations for patients with moderate renal impairment apply to both XELODA monotherapy and XELODA in
combination use with docetaxel.
Cockroft and Gault Equation:
| (140 - age [yrs]) (body wt [kg]) | |
| Creatinine clearance for males = | ———————————— |
| (72) (serum creatinine [mg/dL]) |
Creatinine clearance for females = 0.85 x male value
Geriatrics
Physicians should exercise caution in monitoring the effects of XELODA in the elderly. Insufficient data are available to provide a dosage recommendation.
Important treatment considerations — dose modifications
XELODA dosage may need to be individualized to optimize patient management. Patients should be carefully monitored for toxicity and doses of XELODA should be modified as necessary to accommodate individual patient tolerance to treatment. Toxicity due to XELODA administration may be managed by symptomatic treatment, dose interruptions, and adjustment of XELODA dose. Once the dose has been reduced, it should not be increased at a later time. Please consult XELODA Prescribing Information for recommended dose modifications.
References
- Xeloda [package insert]. South San Francisco, CA: Genentech USA, Inc; 2011.


