Abuse Potential Study of PF-00345439

A Randomized, Double-blind, Triple-dummy, Placebo Controlled, Single-dose, 4-way Crossover Study To Determine The Relative Abuse Potential Of Pf-00345439 (Oxycodone Extended Release Capsules) Compared To Immediate-release Oxycodone And Placebo When Administered Orally Whole And/or Chewed To Non-dependent, Recreational Opioid Users Under Fasted Conditions

This study will determine the relative abuse potential of intact and chewed PF-00345439 (Oxycodone Extended-Release Capsules) compared to crushed oxycodone HCL immediate release (IR) tablets and placebo administered orally to non-dependent, recreational opioid users.

Study Overview

• Status: Completed
• Conditions: Opioid Users
• Intervention / Treatment: Drug: Capsule; Drug: PF-00345439; Drug: PF-00345439; Drug: oxycodone

• Study Type: Interventional
• Enrollment (Actual): 67
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Utah
    • Salt Lake City, Utah, United States, 84106
      • Lifetree Clinical Research

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 55 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Healthy male and/or female subjects between the ages of 18 and 55 years who are recreational opioid users and are NOT dependent on opioids.

Exclusion Criteria:

• Evidence or history of clinically significant medical conditions.
• Diagnosis of substance and/or alcohol dependence (excluding caffeine and nicotine).
• Has participated in, is currently participating in, or is seeking treatment for substance-and/or alcohol-related disorders (excluding nicotine and caffeine).
• Has a positive urine drug screen (UDS) excluding tetrahydrocannabinol (THC).
• Has a positive alcohol breath test.
• Has any history of a condition in which an opioid is contraindicated.
• History of sleep apnea in the past 5 years that has not been resolved or corrected.
• Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results .
• Positive test for Hepatitis B, Hepatitis C, or HIV.
• Allergy or history of hypersensitivity to naloxone HCl, oxycodone HCl, other opioids, and/or lactose.
• Any condition possibly affecting drug absorption (eg, gastrectomy).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Double

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Treatment A; Placebo solution +placebo capsule + placebo capsule chewed.	Drug: Capsule; Taken once
Experimental: Treatment B; PF-00345439 taken whole + placebo solution + placebo chewed	Drug: PF-00345439; 40 mg capsule swallowed whole, taken once; Drug: PF-00345439; 40 mg capsule chewed, taken once
Experimental: Treatment C; PF-00345439 chewed + placebo solution + placebo taken whole	Drug: PF-00345439; 40 mg capsule swallowed whole, taken once; Drug: PF-00345439; 40 mg capsule chewed, taken once
Active Comparator: Treatment D; Oxycodone HCl immediate-release 40 mg tablets (eg, 2 x 5 mg + 1 x 30 mg) + placebo taken whole + placebo chewed	Drug: oxycodone; 40 mg solution, taken once

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Drug Liking: Peak Effect (Emax)	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS); where 0 mm = Not at all and 100 mm = Extremely.	12 hours
High: Peak Effect (Emax)	High assesses the degree that a subject feels a good effect (ie euphoria) at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar scale); where 0 mm = Not at all and 100 mm = Extremely.	12 hours
Drug Liking: Area Under Effect Curve (AUE) From 0-2 Hours	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS); where 0 mm = Not at all and 100 mm = Extremely.	2 hours
High: Area Under Effect Curve (AUE) From 0-2 Hours	High assesses the degree that a subject feels a good effect (ie euphoria) at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar scale); where 0 mm = Not at all and 100 mm = Extremely.	2 hours

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Take Drug Again Effect at 24 Hours	Take drug again visual analogue scale (VAS) is a subjective assessment of the degree to which a participant would desire to take the drug again if given the opportunity. It is presented on a 100 mm VAS with score ranging from 0 mm to 100 mm (score of 0 mm = Definately not and score of 100 mm = Definately so).	24 hours
Overall Drug Liking	Overall Drug Liking visual analogue scale (VAS) is a subjective assessment of the degree to which a participant likes the drug overall. It is presented on a 100 mm VAS with score ranging from 0 mm to 100 mm (score of 0 mm = Not at all and 100 mm = Extremely).	24 hours
Any Drug Effects: Area Under Drug Effect Curve (AUE) From 0-1 Hour	Any drug effects effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Pupillometry: Area Under Effect Curve (AUE) From 0-1 Hour	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions. AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Chewing Duration	Chewing duration is a measurement of the total time a person is able to chew.	5 min
Taste: Subjective Experience from Chewing	Subjective Experience from Chewing is a visual analogue scale (VAS) subjective assessment of the taste of the substance being chewed. Participants are asked to describe the taste of the drug using a VAS with score ranging from 0 mm to 100 mm (score of 0 mm = Extremely unpleasant, 50 mm = neutral, and 100 mm = Extremely pleasant).	5 min
Any Drug Effects: Area Under Drug Effect Curve (AUE) From 0-2 Hours	Any drug effects effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Any Drug Effects: Area Under Drug Effect Curve (AUE) From 0-3 Hours	Any drug effects effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Any Drug Effects: Area Under Drug Effect Curve (AUE) From 0-12 Hours	Any drug effects effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Pupillometry: Area Under Effect Curve (AUE) From 0-2 Hours	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions. AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Pupillometry: Area Under Effect Curve (AUE) From 0-3 Hours	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions. AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Pupillometry: Area Under Effect Curve (AUE) From 0-12 Hours	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions. AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
High: Area Under Effect Curve (AUE) From 0-1 Hour	High VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
High: Area Under Effect Curve (AUE) From 0-3 Hours	High VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
High: Area Under Effect Curve (AUE) From 0-12 Hours	High VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Good Drug Effects: Area Under Drug Effect Curve (AUE) From 0-1 Hour	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Good Drug Effects: Area Under Effect Curve (AUE) From 0-2 Hours	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Good Drug Effects: Area Under Effect Curve (AUE) From 0-3 Hours	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Good Drug Effects: Area Under Effect Curve (AUE) From 0-12 Hours	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Bad Drug Effects: Area Under Effect Curve (AUE) From 0-1 Hour	Bad drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Bad Drug Effects: Area Under Effect Curve (AUE) From 0-2 Hours	Bad drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hour
Bad Drug Effects: Area Under Effect Curve (AUE) From 0-3 Hours	Bad drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Bad Drug Effects: Area Under Effect Curve (AUE) From 0-12 Hours	Bad drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Feeling Sick: Area Under Effect Curve (AUE) From 0-1 Hour	Feeling sick VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Feeling Sick: Area Under Effect Curve (AUE) From 0-2 Hours	Feeling sick VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Feeling Sick: Area Under Effect Curve (AUE) From 0-3 Hours	Feeling sick VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Feeling Sick: Area Under Effect Curve (AUE) From 0-12 Hours	Feeling sick VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Nausea: Area Under Effect Curve (AUE) From 0-1 Hour	Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Nausea: Area Under Effect Curve (AUE) From 0-2 Hours	Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Nausea: Area Under Effect Curve (AUE) From 0-3 Hours	Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Nausea: Area Under Effect Curve (AUE) From 0-12 Hours	Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Sleepy: Area Under Effect Curve (AUE) From 0-1 Hour	Sleepy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Sleepy: Area Under Effect Curve (AUE) From 0-2 Hours	Sleepy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Sleepy: Area Under Effect Curve (AUE) From 0-3 Hours	Sleepy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Sleepy: Area Under Effect Curve (AUE) From 0-12 Hour	Sleepy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Dizzy: Area Under Effect Curve (AUE) From 0-1 Hour	Dizzy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-1) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-1).	1 hour
Dizzy: Area Under Effect Curve (AUE) From 0-2 Hours	Dizzy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-2) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-2).	2 hours
Dizzy: Area Under Effect Curve (AUE) From 0-3 Hours	Dizzy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-3) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-3).	3 hours
Dizzy: Area Under Effect Curve (AUE) From 0-12 Hours	Dizzy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Bad Effects: Peak Effect (Emax)	Bad effects visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Nausea: Peak Effect (Emax)	Nausea visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Feel Sick: Peak Effect (Emax)	Feel sick visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Sleepy: Peak Effect (Emax)	Sleepy visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Dizzy: Peak Effect (Emax)	Dizzy visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Pupillometry: Peak Effect (Emax)	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions.	12 hours
Good Drug Effects: Peak Effect (Emax)	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). AUE (0-12) = Area under the effect versus time curve from time zero to time of last quantifiable effect (0-12).	12 hours
Drug Liking: Area Under Effect Curve (AUE) From 0-1 Hour	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS), where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	1 hour
Drug Liking: Area Under Effect Curve (AUE) From 0-3 Hours	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS), where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	3 hours
Drug Liking: Area Under Effect Curve (AUE) From 0-12 Hours	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS), where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Drug Liking: Time to Maximum (Peak) Effect (TEmax)	Drug liking assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 mm unipolar visual analogue scale (VAS), where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
High: Time to Maximum (Peak) Effect (TEmax)	High VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Any Drug Effects: Time to Maximum (Peak) Effect (TEmax)	Any drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Good Drug Effects: Time to Maximum (Peak) Effect (TEmax)	Good drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Bad Drug Effects: Time to Maximum (Peak) Effect (TEmax)	Bad drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Feel Sick: Time to Maximum (Peak) Effect (TEmax)	Feel sick VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Nausea: Time to Maximum (Peak) Effect (TEmax)	Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Sleepy: Time to Maximum (Peak) Effect (TEmax)	Sleepy visual analogue scale (VAS) assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Dizzy: Time to Maximum (Peak) Effect (TEmax)	Dizzy VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm). TEmax = Time to maximum observed score.	12 hours
Pupillometry: Time to Maximum (Peak) Effect (TEmax)	Pupillometry assessments measured change in pupil size (miosis) as an indicator of opioid pharmacological properties. The same eye for each participant was used for all measurements during the study. Participants had the size of their pupil measured (in mm) using a pupillometer. Measurements were made in a dimly lit (mesopic) room with controlled lighting conditions. TEmax = Time to maximum observed score.	12 hours
Any Drug Effects: Peak Effect (Emax)	Any drug effects VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'not at all' (score of 0 mm) to 'extremely' (score of 100 mm).	12 hours
Texture: Subjective Experience from Chewing	Subjective Experience from Chewing is a visual analogue scale (VAS) subjective assessment of the texture of the substance being chewed. Participants are asked to describe the the texture of the drug using a VAS with score ranging from 0 mm to 100 mm (score of 0 mm = Extremely unpleasant, 50 mm = neutral, and 100 mm = Extremely pleasant).	5 mins
Maximum Observed Plasma Concentration (Cmax)		24hr
Time to Reach Maximum Observed Plasma Concentration (Tmax)		24hr
Area under the curve (AUC)		24hr
Systemic Clearance (CL)		24hr
volume of distribution (Vd)		24hr
Half-Life (t1/2)		24 hours

Collaborators and Investigators

• Sponsor: Pain Therapeutics

Publications and helpful links

Helpful Links

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Study record dates

Study Major Dates

• Study Start: November 1, 2013
• Primary Completion (Actual): August 1, 2014
• Study Completion (Actual): August 1, 2014

Study Registration Dates

• First Submitted: November 1, 2013
• First Submitted That Met QC Criteria: November 11, 2013
• First Posted (Estimate): November 18, 2013

Study Record Updates

• Last Update Posted (Estimate): April 4, 2016
• Last Update Submitted That Met QC Criteria: March 31, 2016
• Last Verified: March 1, 2016

More Information

Terms related to this study

• Keywords: drug abuse; Abuse potential; PF-00345439
• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Central Nervous System Depressants; Peripheral Nervous System Agents; Analgesics; Sensory System Agents; Analgesics, Opioid; Narcotics; Oxycodone
• Other Study ID Numbers: B4501016