Study to Evaluate ATP-induced Pain and ATP-induced Dermal Vasodilation by Iontophoresis (0000-118)(COMPLETED)

July 29, 2015 updated by: Merck Sharp & Dohme LLC

A Randomized, Double Blind, Placebo Controlled, Crossover Clinical Trial to Evaluate the Effects of ATP-Induced Pain (AIP) and ATP-induced Dermal Vasodilation (AIDV) by Iontophoresis in Healthy Subjects

This study will evaluate ATP-induced Pain (AIP) and ATP-induced dermal vasodilation (AIDV) as target engagement tools for future development of analgesics.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

44

Phase

  • Phase 1

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Subject is in generally good health
  • Subject is willing to abstain from smoking within 24 hours of each iontophoresis treatment and limit smoking to 5 or less cigarettes per week during the study

Exclusion Criteria:

  • Subject has a history of dermatitis, psoriasis, or eczema
  • Subject has active asthma and/or hay fever at the time of the screening visit
  • Subject is unable to refrain from use of analgesics within 3 days prior to each treatment period

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

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

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: 2
Saline
Procedure: Comparator: Iontophoresis and Laser Doppler with Saline
Iontophoresis treatments with 20 mM saline solution and a current of 0.8 or 1.2 mA. Iontophoresis treatments will last 4 minutes. Laser doppler will be used during the iontophoresis treatments to measure dermal blood flow.
Active Comparator: 1
ATP
Procedure: Comparator: Iontophoresis and Laser Doppler with ATP
Iontophoresis treatments with 10 mM ATP (adenosine triphosphate) solution and a current of 0.8 or 1.2 mA. Iontophoresis treatments will last 4 minutes. Laser doppler will be used during the iontophoresis treatments to measure dermal blood flow.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Degree of pain induced by ATP vs. saline iontophoresis
Time Frame: 4 minutes
4 minutes
Increase in blood flow induced by ATP iontophoresis
Time Frame: 8 minutes
8 minutes

Secondary Outcome Measures

Outcome Measure
Time Frame
Test-retest reproducibility and intra-subject variability of AIP and AIDV
Time Frame: 8 minutes
8 minutes

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Merck Sharp & Dohme LLC

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

October 1, 2009

Primary Completion (Actual)

June 1, 2011

Study Completion (Actual)

June 1, 2011

Study Registration Dates

First Submitted

June 8, 2009

First Submitted That Met QC Criteria

June 8, 2009

First Posted (Estimate)

June 10, 2009

Study Record Updates

Last Update Posted (Estimate)

July 30, 2015

Last Update Submitted That Met QC Criteria

July 29, 2015

Last Verified

July 1, 2015

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 0000-118
  • 2009_600

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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