Palonosetron Hydrochloride in Preventing Nausea and Vomiting Caused by Radiation Therapy in Patients With Primary Abdominal Cancer

OBJECTIVES:

- Evaluate the rate of complete responses, defined as no vomiting and no nausea, in
patients with primary gastrointestinal and/or retroperitoneal sarcomas treated with two
different dosing schedules of palonosetron hydrochloride during abdominal radiotherapy
as part of their cancer treatment.

- Determine the tolerability of palonosetron hydrochloride vs placebo in these patients.

- Validate patient diaries for assessing nausea and vomiting by comparing with alternative
methods for measuring nausea and vomiting in order to determine the optimal approach for
future studies.

OUTLINE: Patients are stratified according to planned radiotherapy duration (< 5 weeks vs ≥ 5
weeks), planned concurrent fluorouracil ( yes vs no), and gender. Patients are randomized to
1 of 4 treatment arms.

- Arm I: Patients receive palonosetron hydrochloride IV on day 1.

- Arm II: Patients receive palonosetron hydrochloride IV on days 1 and 4.

- Arm III: Patients receive placebo IV on day 1.

- Arm IV: Patients receive placebo IV on days 1 and 4. In all arms, courses repeat weekly
during radiotherapy in the absence of disease progression or unacceptable toxicity.

Patients complete nausea and vomiting questionnaires and diaries at baseline and daily during
radiotherapy. Patients also complete symptom experience diaries weekly during radiotherapy.

DISEASE CHARACTERISTICS:

- Diagnosis of primary gastrointestinal and/or retroperitoneal sarcoma

- Scheduled to undergo ≥ 3000 cGy or ≥ 3 weeks of external beam radiation to the abdomen

- Radiotherapy fields to extend between T11 and L3, and of a size ≥ 100 cm^2

- No brain metastases

PATIENT CHARACTERISTICS:

- ECOG performance status 0-2

- Negative pregnancy test

- Not pregnant or nursing

- Fertile patients must use effective contraception

- Able to complete questionnaire(s) alone or with assistance

- Willing to return to NCCTG enrolling institution for follow-up

- Able to reliably take oral medication (for purposes of rescue medication)

- No hypersensitivity to palonosetron hydrochloride or other selective 5-HT3 receptor
antagonists

- No comorbid systemic illness or other severe concurrent disease that, in the judgment
of the investigator, would make the patient inappropriate for study entry or interfere
significantly with the proper assessment of safety and toxicity of the prescribed
regimens

- No nausea ≤ 48 hours prior to study enrollment

- No history of dystonic reactions to prochlorperazine or haloperidol or related agents

PRIOR CONCURRENT THERAPY:

- See Disease Characteristics

- More than 7 days since prior agents known to have significant effects on emesis,
including the following:

- Ondansetron

- Sedating antihistamines

- Antipsychotics

- Cannabinoids

- Corticosteroids

- Metoclopramide

- Narcotic analgesics

- Benzodiazepines

- More than 7 days since prior chemotherapy other than fluorouracil or capecitabine used
as a radiosensitizer

- More than 7 days since of prior cetuximab

- More than 7 days since prior and no concurrent oral steroids

- No prior palonosetron hydrochloride