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Weekly paclitaxel for unresectable angiosarcoma[1]

Weekly paclitaxel for unresectable angiosarcoma[1]
Cycle length: 28 days.
Drug Dose and route Administration Given on days
Paclitaxel 80 mg/m2 IV Dilute in 250 mL normal saline or 5% dextrose in water (D5W)* and administer over one hour; special tubing needed. Days 1, 8, and 15
Pretreatment considerations:
Emesis risk
  • LOW (10 to 30% frequency of emesis).
  • Refer to UpToDate topic on "Prevention and treatment of chemotherapy-induced nausea and vomiting in adults".
Prophylaxis for infusion reactions
  • Premedicate with dexamethasone plus both an H1 and an H2 receptor antagonist prior to paclitaxel administration.[2]
  • Refer to UpToDate topic on "Infusion reactions to systemic chemotherapy".
Vesicant/irritant properties
  • Paclitaxel can cause significant tissue damage; avoid extravasation.
  • Refer to UpToDate topic on "Extravasation injury from chemotherapy and other non-antineoplastic vesicants".
Infection prophylaxis
  • Primary prophylaxis with G-CSF is not generally warranted except in highest risk patients. In the original publication, febrile neutropenia was observed in only 2 of 30 patients during the first two cycles.[1]
  • Refer to UpToDate topic on "Use of granulocyte colony stimulating factors in adult patients with chemotherapy-induced neutropenia and conditions other than acute leukemia, myelodysplastic syndrome, and hematopoietic cell transplantation".
Dose adjustment for baseline liver or renal dysfunction
  • A lower starting dose of paclitaxel may be needed in patients with liver impairment.
  • Refer to UpToDate topic on "Chemotherapy hepatotoxicity and dose modification in patients with liver disease: Conventional cytotoxic agents" and "Chemotherapy hepatotoxicity and dose modification in patients with liver disease: Molecularly targeted agents".
Monitoring parameters:
  • CBC with differential prior to treatment weekly during each cycle.
  • Assess serum electrolytes prior to treatment weekly during each cycle.
  • Assess renal and liver function prior to treatment weekly during each cycle.
  • Assess for neurologic toxicity prior to each treatment.
Suggested dose modifications for toxicity:
Myelotoxicity
  • In the original protocol, new cycles were not started unless granulocyte count was >1500 cells/microL and platelets >100,000/microL.[1] For grade 3 or 4 toxicity, the weekly paclitaxel dose was reduced to 70 mg/m2, and then to 60 mg/m2 for a second episode of toxicity.[1]
Peripheral neuropathy
  • The development of severe symptomatic peripheral neuropathy requires a dose reduction of 20% for all subsequent courses of paclitaxel or may be cause for discontinuation of paclitaxel therapy.[2]
Other toxicity
  • For any other grade 3 or 4 toxicity, paclitaxel dose was reduced to 70 mg/m2 and then to 60 mg/m2 for a second episode of that toxicity.[1]
If there is a change in body weight of at least 10%, doses should be recalculated.
This table is provided as an example of how to administer this regimen; there may be other acceptable methods. This regimen must be administered by a clinician trained in the use of chemotherapy, who should use independent medical judgment in the context of individual circumstances to make adjustments, as necessary.
IV: intravenous; G-CSF: granulocyte-colony stimulating factors; CBC: complete blood count.
* Diluent solutions should not be modified without consulting a detailed reference due to potential incompatibility(ies).
¶ Paclitaxel can be administered in normal saline, D5W, or normal saline/D5W at varying concentrations between 0.3 to 1.2 mg/mL. Use glass or polypropylene bottles or polypropylene or polyolefin plastic bags, and administer through polyethylene-lined administration sets with a microporous membrane 0.22 microns or less.
References:
  1. Penel N, et al. J Clin Oncol 2008; 26:5269.
  2. Paclitaxel injection. United States Prescribing Information. US National Library of Medicine. (Available online at www.dailymed.nlm.nih.gov, accessed May 20, 2013).
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