CClinicalTrials.gg
CompletedNCT02070718Updated Jul 1, 2015

Effects of a Kappa Agonist on Hot Flashes in Menopausal Women

A Phase 1 interventional study of Standard Dose Kappa Agonist and Half Dose Kappa Agonist in Treatment of Menopausal Hot Flashes, sponsored by University of Washington. Completed at 1 site in United States. Open to female participants aged 45 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2015-07-01.

Sponsored by University of Washington · Phase 1, Interventional, and Treatment

Phase
Phase 1
Study type
Interventional
Enrollment
12
Allocation
Randomized
Ages
45 Years to 60 Years
Sex
Female
01

Study summary

Studies suggest that kappa agonists (KA) and peripherally restricted kappa agonists (PRKAs) may affect thermoregulation. This pilot study has the aim to establish proof of concept regarding efficacy of an oral kappa agonist (KA) for the treatment of menopausal hot flashes.

Read the detailed description

To establish proof of concept regarding efficacy of an oral kappa agonist (KA), Pentazocine/ Naloxone 50/0.5 mg, for the treatment of menopausal hot flashes.

To gather data in support of a future proposal to study the safety and efficacy of a PRKA, a type of KA, for amelioration of menopausal hot flashes.

02

Conditions studied

  • Treatment of Menopausal Hot Flashes

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Keywords

  • hot flashes
  • menopause
  • kappa agonist
03

In context

Hot Flashes

284 studies on the registry are indexed under Hot Flashes; 49 are open to participants now.

This study's enrollment of 12 is below the median of 90 across 254 interventional studies indexed under Hot Flashes.

Browse Hot Flashes studies →

Lead sponsor

University of Washington is the lead sponsor of 1,397 studies on the registry; 225 are open to participants now.

Of its 154 completed or terminated interventional studies of FDA-regulated products, 132 (86%) have results posted.

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

04

Who can participate

Ages eligible
45 Years to 60 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

  1. Healthy women 45-60 years of age; 12 months amenorrhea
  2. Documentation of > 8 moderate to severe, daily hot flashes during one week of baseline monitoring using daily diaries
  3. Availability of a family member or friend to drive participant home following clinic visits

Exclusion criteria

Exclusion Criteria:

  1. Use of hormonal prescription medication or supplements for vasomotor symptoms (VMS)
  2. Use of narcotics
  3. Use of SSRI (selective serotonin reuptake inhibitor)/SNRI (serotonin-norepinephrine reuptake inhibitors), gabapentin, MAOI (monoamine oxidase inhibitor), anti-epileptics, sedatives
  4. History of polycystic ovarian syndrome or hirsutism
  5. Current history of depression
  6. Any chronic or acute medical illnesses including renal, hepatic, pulmonary diseases, or seizures
  7. Substance abuse
  8. Severe corn allergy
  9. Known allergic reaction to pentazocine or naloxone
  10. Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the patient or the quality of the data
  11. Hysterectomy
  12. Use of anticholinergic medications
  13. Lactating or pregnant
05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
12 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    Cornstarch, National Formulary

    Other: Placebo

  • Experimental
    Standard Dose Kappa Agonist

    Pentazocine/Naloxone 50/0.5 mg

    Drug: Standard Dose Kappa Agonist

  • Experimental
    Half Dose Kappa Agonist

    Pentazocine/Naloxone 25/0.25 mg

    Drug: Half Dose Kappa Agonist

Interventions

  • DrugStandard Dose Kappa Agonist

    Also known as: Pentazocine/Naloxone 50/0.5 mg

  • DrugHalf Dose Kappa Agonist

    Also known as: Pentazocine/Naloxone 25/0.25 mg

  • OtherPlacebo
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What researchers measure

Primary outcomes

  1. Hot Flashes

    Objectively measured hot flash frequency by changes in skin conductance over 8 hours on 3 separate study visits 3-14 days apart.

    Time frame: 1-4 weeks

Secondary outcomes

  1. Subjectively measured hot flashes

    Self-reported diary documentation of time and occurence of hot flashes and intensity of hot flashes over 8 hours on 3 separate study visits 3-14 days apart.

    Time frame: 1-4 weeks

  2. Change in Serum Leutinizing Hormone

    Serum collected at each visit baseline (before administration of treatment) and at 20-minute intervals over 8 hours on 3 separate study visits 3-14 days apart.

    Time frame: 1-4 weeks

Other outcomes

  1. Serum Follicle Stimulating Hormone

    Baseline (1st visit) single time point

    Time frame: Baseline only

  2. Serum Estradiol

    Baseline (1st visit) single time point only.

    Time frame: Baseline only

07

Study locations

1 site
  • University of Washington
    Seattle, Washington 98195, United States
08

References and documents

Publications

  • Oakley AE, Steiner RA, Chavkin C, Clifton DK, Ferrara LK, Reed SD. kappa Agonists as a novel therapy for menopausal hot flashes. Menopause. 2015 Dec;22(12):1328-34. doi: 10.1097/GME.0000000000000476. PubMed 25988798 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 1, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02070718
Lead sponsor
University of Washington
Collaborators
National Institute on Aging (NIA), Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Center for Complementary and Integrative Health (NCCIH), Office of Research on Women's Health (ORWH), National Center for Advancing Translational Sciences (NCATS)
Responsible party
Susan Reed (Professor, Obstetrics & Gynecology, University of Washington) — Principal investigator
First posted
Feb 25, 2014
Start date
Jan 2013
Primary completion
Jul 2013
Completion
Jul 2013
Last update
Jul 1, 2015

Study contacts

Susan D Reed, MD, MPH
principal investigator · University of Washington

Oversight

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

Not currently enrolling

This study is completed, as verified in Jun 2015. You cannot join it, but the record below documents what was studied.

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