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A Multi-Center, Open-Label, 2-Arm, Randomized, Stratified, Parallel, Pilot Study to Assess Palonosetron vs. Ondansetron as Rescue Medication in Subjects That Develop Postoperative Nausea and Vomiting (PONV) in the Postanesthesia Care Unit (PACU)

Phase 2
18 Years
Not Enrolling
Postoperative Nausea and Vomiting

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Trial Information

A Multi-Center, Open-Label, 2-Arm, Randomized, Stratified, Parallel, Pilot Study to Assess Palonosetron vs. Ondansetron as Rescue Medication in Subjects That Develop Postoperative Nausea and Vomiting (PONV) in the Postanesthesia Care Unit (PACU)

Postoperative nausea and vomiting (PONV) is a frequent complication of surgery, which can
lead to subject discomfort and dissatisfaction as well as considerable subsequent medical
and economic consequences. In this multi-center, open-label, parallel, randomized, pilot
study, outpatient surgical patients who experience post-operative nausea or vomiting in the
PACU will be stratified by gender and randomly assigned to either palonosetron HCl 0.075 mg
IV or ondansetron 4 mg IV in a minimization random allocation. Male or female outpatients,
scheduled for elective laparoscopic abdominal or gynecological surgery under general
endotracheal anesthesia will be enrolled. All subjects will be asked to attend 2 visits to
the study center:

1. Screening (Days -14 to -1)

2. Treatment (Day 1, the day of the surgical procedure and randomization) Subjects treated
will receive a follow-up telephone call by the Study Coordinator on Study Day 4 or 5 to
review the subject diary for completion, to review adverse events, and concomitant
medications, prior to the subject returning the completed diary to the site.

At the Screening visit, subjects who provide their informed consent will undergo a clinical
assessment. Demographic and baseline characteristics, including entrance criteria
determination, medical history, history of PONV and/or currently prone to motion sickness,
smoking status, prior and concomitant medication, physical examination, and vital signs will
be documented.

On the day of surgery, all subjects who meet the eligibility criteria will be
prophylactically treated prior to anesthesia with ondansetron 4 mg IV, as preoperative
antiemetic treatment. As clinically indicated for rescue therapy, subjects experiencing a
nausea severity score ≥4 on the 11-point NRS, vomiting, or indicating a subject request will
receive blinded study medication as their first line rescue therapy for PONV while in the
PACU and no more than 6 hours after PACU admission. Subjects requiring rescue medication
need to be dosed within 10 minutes of identifying the need for rescue medication. In an
effort to ensure that this timeline is not exceeded, the sites will be allowed to randomize
the subject prior to surgery, on the day of surgery. Subjects who are randomized but do not
require rescue therapy and therefore not dosed with study drug, will be considered 'Subjects
randomized but not treated'.

Subject diaries will be used to record the date and time of study drug administration, the
reason for administering rescue medication, baseline emetic symptoms immediately prior to
administration of rescue medication, the occurrence of emetic episodes, the severity and
duration of nausea, and subject functioning evaluations for nausea and emesis assessed
according to the modified Osoba questionnaire (Martin et. al. 2003). The baseline assessment
that is performed just prior to administering the rescue medication must indicate that at
least one of the following conditions was met:

1. the subject had a nausea severity score ≥4 on the 11-point (0-10) NRS

2. vomiting

3. subject request: subject request must be approved by site staff and must be based on
either nausea or emesis symptoms

Inclusion Criteria:

1. Male or female >=18 years of age.

2. American Society of Anesthesiologists (ASA) physical status 1 to 3.

3. Presence of at least 2 of the following PONV risk factors:

- female gender

- history of PONV and/or currently prone to motion sickness (if the subjects
cannot remember their last experience of motion sickness or if they suffered
from it as a child, then they will not be classified as "prone")

- non-smoking status (never smoked or quit >=12 months ago)

4. Outpatient undergoing elective laparoscopic gynecological or abdominal surgery

5. Surgery for which anesthesia is expected to last at least 30 minutes

6. General endotracheal anesthesia conducted as outlined in the anesthetic procedures
section of the protocol

7. If a subject has a known hepatic, renal or cardiovascular impairment, he/she may be
enrolled in this study at the discretion of the Investigator

8. If a subject has or may develop prolongation of cardiac conduction intervals,
particularly QTc, he/she may be enrolled at the discretion of the Investigator.

9. If a subject is female of childbearing potential, she must be using reliable
contraceptive measures and have a negative serum beta human chorionic gonadotropin
(β-hCG) pregnancy test within 72 hours prior to surgery on Day 1. Reliable
contraceptive measures include implants, injectables, combined oral contraceptives,
some intrauterine devices, vasectomized partner or sexual abstinence.
Non-childbearing potential is defined as post-menopausal for at least 2 years or
documented surgical sterilization or hysterectomy at least 3 months before study

Exclusion Criteria:

1. Inability to understand or cooperate with the study procedures as determined by the

2. Women who are pregnant, nursing or planning to become pregnant, are not using
effective birth control, or that have had a positive serum pregnancy test within 72
hours prior to surgery on Day 1.

3. A cancer patient who has had chemotherapy within 4 weeks prior to study entry
(Screening visit).

4. Any kind of emetogenic radiotherapy within 8 weeks prior to study entry (Screening

5. Has received any investigational drugs within 30 days before study entry.

6. Having taken any drug with potential antiemetic efficacy within 24 hours prior to
anesthetic procedures.

7. Any vomiting, retching, or nausea in the 24 hours preceding the administration of
anesthesia .

8. Body mass index (BMI) > 40.

9. Known or suspected current history of alcohol abuse or drug abuse.

10. Known hypersensitivity/contraindication to 5-HT3 antagonists or study drug

11. Epileptic patients.

12. Any condition, which in the opinion of the Investigator would make the subject
ineligible for participation in the study.

Type of Study:


Study Design:

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Outcome Measure:

Proportion of subjects with Complete Control (CC)

Outcome Time Frame:

From 0 to 72 hours postdose

Safety Issue:


Principal Investigator

David Cox

Investigator Role:

Study Director

Investigator Affiliation:

Eisai Inc.


United States: Food and Drug Administration

Study ID:




Start Date:

July 2009

Completion Date:

April 2010

Related Keywords:

  • Postoperative Nausea and Vomiting
  • PONV
  • rescue
  • Nausea
  • Vomiting
  • Postoperative Nausea and Vomiting



University of Kansas Medical CenterKansas City, Kansas  66160-7353
Duke University Medical CenterDurham, North Carolina  27710
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Ohio State University Medical CenterColumbus, Ohio  43210
University of MiamiMiami, Florida  33136
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Accurate Clinical Trials, IncLaguna Hills, California  92653