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Influence of Pregnenolone on Exposure Therapy in Obsessive-compulsive Disorder (P-EX)

This study is currently recruiting participants. (see Contacts and Locations)
Verified December 2015 by Universitätsklinikum Hamburg-Eppendorf
Information provided by (Responsible Party):
Universitätsklinikum Hamburg-Eppendorf Identifier:
First received: September 20, 2013
Last updated: December 7, 2015
Last verified: December 2015
Characterization of the influence of pregnenolone vs. placebo on subjective distress and autonomic functioning during cognitive-behavioral exposure therapy in patients with obsessive-compulsive disorder.

Condition Intervention Phase
Obsessive-compulsive Disorder (OCD)
Behavioral: Exposure therapy with pharmacological facilitation
Behavioral: Exposure therapy
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Investigator)
Primary Purpose: Basic Science
Official Title: Influence of Pregnenolone on Distress and Autonomic Parameters During Cognitive-behavioral Exposure Therapy in Patients With Obsessive-compulsive Disorder

Resource links provided by NLM:

Further study details as provided by Universitätsklinikum Hamburg-Eppendorf:

Primary Outcome Measures:
  • Subjective units of distress (SUD) [ Time Frame: During exposure therapy ]

Secondary Outcome Measures:
  • Low/high frequency index of heart rate variability (L/HFI) [ Time Frame: During exposure therapy ]

Other Outcome Measures:
  • Salivary cortisol, noradrenaline, pregnenolone; heart rate, blood pressure [ Time Frame: During exposure therapy ]

Estimated Enrollment: 60
Study Start Date: September 2013
Estimated Study Completion Date: December 2018
Estimated Primary Completion Date: December 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Nutritional supplement Pregnenolone
Exposure therapy, exposure with response prevention and pharmacological facilitation (nutritional supplement pregnenolone), orally two hours before exposure therapy.
Behavioral: Exposure therapy with pharmacological facilitation
Exposure with response prevention and pharmacological facilitation
Placebo Comparator: Placebo
Exposure therapy, exposure with response prevention without pharmacological facilitation (Placebo), orally two hours before exposure therapy.
Behavioral: Exposure therapy
Exposure with response prevention without pharmacological facilitation

Detailed Description:

Main out-come parameters:

Inter-session habituation as per SUD (100 mm VAS), Y-BOCS

Secondary out-come parameter:

HF/LF of HRV, Salivary epinephrine


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

-OCD according to DSM-IV criteria.

Exclusion Criteria:

  • Acute suicidality
  • psychotic disorders,
  • bipolar disorder
  • substance dependency
  • organic brain disorder
  • pregnancy
  • lactation
  • tuberculosis
  • gastric/duodenal ulcer
  • diabetes mellitus
  • acute inflammation
  • autoimmune disorders
  • arterial hypertension
  • therapy with glucocorticoids (up to 4 weeks ago)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01949753

Contact: Michael Kellner, MD, PhD

University Hospital Hamburg-Eppendorf Recruiting
Hamburg, Germany
Principal Investigator: Michael Kellner, MD, PhD         
Sponsors and Collaborators
Universitätsklinikum Hamburg-Eppendorf
Principal Investigator: Michael Kellner, MD, PhD Universitätsklinikum Hamburg-Eppendorf
  More Information

Responsible Party: Universitätsklinikum Hamburg-Eppendorf Identifier: NCT01949753     History of Changes
Other Study ID Numbers: PV4398
Study First Received: September 20, 2013
Last Updated: December 7, 2015

Keywords provided by Universitätsklinikum Hamburg-Eppendorf:
Obsessive-compulsive disorder (OCD)
Exposure therapy
Extinction learning

Additional relevant MeSH terms:
Compulsive Personality Disorder
Obsessive-Compulsive Disorder
Compulsive Behavior
Pathologic Processes
Personality Disorders
Mental Disorders
Anxiety Disorders
Impulsive Behavior processed this record on May 25, 2017