Multiple-Ascending-Dose Study to Evaluate the Safety of Propoxyphene Napsylate In Healthy Adult Subjects

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01133873
Recruitment Status : Terminated
First Posted : May 31, 2010
Last Update Posted : April 13, 2011
Information provided by:
Xanodyne Pharmaceuticals

Brief Summary:
The purpose of this study is to determine the daily maximum tolerated dose of propoxyphene napsylate in healthy subjects.

Condition or disease Intervention/treatment Phase
Healthy Drug: Propoxyphene napsylate (XP20C) Drug: Placebo Phase 4

Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 48 participants
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: A Randomized, Multiple-Dose, Double-Blind, Placebo-Controlled Study of Sequential Ascending Dose Levels to Assess the Safety, Tolerability and Electrocardiographic Effects of Propoxyphene Napsylate Capsules (and Its Metabolite Norpropoxyphene) When Administered Orally to Healthy Adult Subjects
Study Start Date : June 2010
Actual Primary Completion Date : November 2010
Actual Study Completion Date : November 2010

Resource links provided by the National Library of Medicine

U.S. FDA Resources

Arm Intervention/treatment
Experimental: 1 Drug: Propoxyphene napsylate (XP20C)
100 mg capsules 6 times a day in ascending doses until a maximum tolerated dose is identified
Other Names:
  • propoxyphene napsylate
  • Darvon-N
  • XP20C
Placebo Comparator: 2 Drug: Placebo
6 times a day in ascending doses until a maximum tolerated dose is identified

Primary Outcome Measures :
  1. Determine the safety and tolerability of propoxyphene napsylate as determined by evaluation of adverse events, change from baseline of ventricular repolarization, lab results, and mental status [ Time Frame: Day 13 ]

Secondary Outcome Measures :
  1. Establish the relationship between serum concentrations of propoxyphene and norpropoxyphene on cardiac conduction and pharmacokinetic linearity of sequentially increased dose levels of propoxyphene napsylate. [ Time Frame: Days -1, 1, 4, 11 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 49 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Body mass index ≥ 18 and ≤ 30 (kg/m2)
  • Medically healthy with normal screening results, or in the case of results that are abnormal; the abnormal results are clinically insignificant (eg, medical history, physical examination, neurological assessment, vital signs, oxygen saturation, laboratory profiles)
  • 12-lead ECGs (calculations by the electrocardiograph) which have no clinically significant findings
  • Vital signs which are within normal range
  • No tobacco/nicotine-containing product use for a minimum of 6 months
  • If female, must be able to adhere to acceptable methods of contraception or be postmenopausal or surgically sterile

Exclusion Criteria:

  • History or presence of significant cardiovascular, hepatic, renal, hematological, gastrointestinal, endocrine, immunologic, dermatologic, or neurological disease
  • History or presence of any degree of chronic obstructive pulmonary disease
  • History of suicidal ideations or depression requiring professional intervention including counseling or antidepressant medication
  • Any history of drug or alcohol abuse
  • Positive drug (urine)/alcohol (breath) testing at screening or check-in
  • Positive test for human immunodeficiency virus (HIV), hepatitis B surface antigen (HBsAg), or hepatitis C antibodies (HCV)
  • History of hypersensitivity or allergy to propoxyphene or any opioid compound, naloxone, naltrexone, palonosetron (Aloxi®), glycerin, senna, or bisacodyl (Dulcolax®)
  • Use of any prescription medication (with the exception of hormonal contraceptives for females) within 2 weeks of enrollment
  • Use of any over-the-counter medication, including herbal products, within 1 week of enrollment
  • Use of any drugs known to significantly inhibit or induce liver enzymes involved in drug metabolism [CYP P450]) within 30 days of enrollment
  • Blood donation or significant blood loss within 30 days of enrollment
  • Plasma donation within 7 days of enrollment
  • Participation in another clinical trial within 30 days of enrollment
  • Females who are pregnant or lactating
  • Any other condition or prior therapy, which, in the opinion of the PI, would make the subject unsuitable for this study

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01133873

United States, Utah
Lifetree Clinical Research
Salt Lake City, Utah, United States, 84106
Sponsors and Collaborators
Xanodyne Pharmaceuticals
Principal Investigator: Lynn R Webster, MD Lifetree Clinical Research

Responsible Party: Gary Shangold, MD / Chief Medical Officer, Xanodyne Pharmaceuticals, Inc. Identifier: NCT01133873     History of Changes
Other Study ID Numbers: XP20C-101
First Posted: May 31, 2010    Key Record Dates
Last Update Posted: April 13, 2011
Last Verified: April 2011

Additional relevant MeSH terms:
Analgesics, Opioid
Central Nervous System Depressants
Physiological Effects of Drugs
Sensory System Agents
Peripheral Nervous System Agents
Antitussive Agents
Respiratory System Agents