CClinicalTrials.gg
CompletedNCT01986283Updated Apr 4, 2016

Abuse Potential Study of PF-00345439

A Phase 1 interventional study of Capsule and PF-00345439 in Opioid Users, sponsored by Pain Therapeutics. Completed at 1 site in United States. Open to participants aged 18 Years to 55 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2016-04-04.

Sponsored by Pain Therapeutics · Phase 1, Interventional, and Basic science

Phase
Phase 1
Study type
Interventional
Enrollment
67
Allocation
Randomized
Ages
18 Years to 55 Years
Sex
All
01

Study summary

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.

02

Conditions studied

  • Opioid Users

Keywords

  • Abuse potential
  • PF-00345439
  • drug abuse
03

In context

Lead sponsor

Pain Therapeutics is the lead sponsor of 16 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 55 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

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

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).
05

Study design

Phase
Phase 1
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Participant, Investigator)
Enrollment
67 participants (actual)

Study arms

  • Placebo comparator
    Treatment A

    Placebo solution +placebo capsule + placebo capsule chewed.

    Drug: Capsule

  • Experimental
    Treatment B

    PF-00345439 taken whole + placebo solution + placebo chewed

    Drug: PF-00345439

  • Experimental
    Treatment C

    PF-00345439 chewed + placebo solution + placebo taken whole

    Drug: PF-00345439

  • 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

Interventions

  • DrugCapsule

    Taken once

  • DrugPF-00345439

    40 mg capsule swallowed whole, taken once

  • DrugPF-00345439

    40 mg capsule chewed, taken once

  • Drugoxycodone

    40 mg solution, taken once

06

What researchers measure

Primary outcomes

  1. 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.

    Time frame: 12 hours

  2. 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.

    Time frame: 12 hours

  3. 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.

    Time frame: 2 hours

  4. 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.

    Time frame: 2 hours

Secondary outcomes

  1. 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).

    Time frame: 24 hours

  2. 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).

    Time frame: 24 hours

  3. 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).

    Time frame: 1 hour

  4. 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).

    Time frame: 1 hour

  5. Chewing Duration

    Chewing duration is a measurement of the total time a person is able to chew.

    Time frame: 5 min

  6. 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).

    Time frame: 5 min

  7. 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).

    Time frame: 2 hours

  8. 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).

    Time frame: 3 hours

  9. 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).

    Time frame: 12 hours

  10. 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).

    Time frame: 2 hours

  11. 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).

    Time frame: 3 hours

  12. 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).

    Time frame: 12 hours

  13. 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).

    Time frame: 1 hour

  14. 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).

    Time frame: 3 hours

  15. 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).

    Time frame: 12 hours

  16. 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).

    Time frame: 1 hour

  17. 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).

    Time frame: 2 hours

  18. 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).

    Time frame: 3 hours

  19. 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).

    Time frame: 12 hours

  20. 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).

    Time frame: 1 hour

  21. 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).

    Time frame: 2 hour

  22. 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).

    Time frame: 3 hours

  23. 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).

    Time frame: 12 hours

  24. 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).

    Time frame: 1 hour

  25. 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).

    Time frame: 2 hours

  26. 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).

    Time frame: 3 hours

  27. 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).

    Time frame: 12 hours

  28. 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).

    Time frame: 1 hour

  29. 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).

    Time frame: 2 hours

  30. 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).

    Time frame: 3 hours

  31. 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).

    Time frame: 12 hours

  32. 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).

    Time frame: 1 hour

  33. 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).

    Time frame: 2 hours

  34. 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).

    Time frame: 3 hours

  35. 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).

    Time frame: 12 hours

  36. 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).

    Time frame: 1 hour

  37. 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).

    Time frame: 2 hours

  38. 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).

    Time frame: 3 hours

  39. 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).

    Time frame: 12 hours

  40. 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).

    Time frame: 12 hours

  41. 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).

    Time frame: 12 hours

  42. 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).

    Time frame: 12 hours

  43. 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).

    Time frame: 12 hours

  44. 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).

    Time frame: 12 hours

  45. 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.

    Time frame: 12 hours

  46. 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).

    Time frame: 12 hours

  47. 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).

    Time frame: 1 hour

  48. 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).

    Time frame: 3 hours

  49. 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).

    Time frame: 12 hours

  50. 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).

    Time frame: 12 hours

  51. 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.

    Time frame: 12 hours

  52. 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.

    Time frame: 12 hours

  53. 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.

    Time frame: 12 hours

  54. 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.

    Time frame: 12 hours

  55. 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.

    Time frame: 12 hours

  56. 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.

    Time frame: 12 hours

  57. 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).

    Time frame: 12 hours

  58. 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.

    Time frame: 12 hours

  59. 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.

    Time frame: 12 hours

  60. 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).

    Time frame: 12 hours

  61. 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).

    Time frame: 5 mins

  62. Maximum Observed Plasma Concentration (Cmax)

    Time frame: 24hr

  63. Time to Reach Maximum Observed Plasma Concentration (Tmax)

    Time frame: 24hr

  64. Area under the curve (AUC)

    Time frame: 24hr

  65. Systemic Clearance (CL)

    Time frame: 24hr

  66. volume of distribution (Vd)

    Time frame: 24hr

  67. Half-Life (t1/2)

    Time frame: 24 hours

07

Study locations

1 site
  • Lifetree Clinical Research
    Salt Lake City, Utah 84106, United States
08

References and documents

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 4, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01986283
Lead sponsor
Pain Therapeutics
Responsible party
Sponsor
First posted
Nov 18, 2013
Start date
Nov 2013
Primary completion
Aug 2014
Completion
Aug 2014
Last update
Apr 4, 2016

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2016. You cannot join it, but the record below documents what was studied.

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