- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01496911
Effects of Levocetirizine and Hydroxyzine on Cognitive and Psychomotor Functioning During Simulated Diving
Study to Investigate the Effects of Levocetirizine and Hydroxyzine on Cognitive and Psychomotor Functioning During Simulated Diving at 2 Bar and 4 Bar in Professional Navy Divers
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
This double-blind, randomized, placebo-controlled cross-over study will comprise of 1 training day and 3 test days. Twenty-four healthy male divers from the Royal Netherlands Navy will participate in this study.The objective of this study is to investigate the single dose effects of levocetirizine (5 mg), hydroxyzine (50 mg) and placebo.
Visit 1 is a training day, and Visit 2-4 are test days. At the test day, subjects receive one of the three medications. One hour after administration of the drugs, subjects will start with the dive in the recompression chamber. After one hour, medication has reached their peak plasma concentration, and effects can be expected. There will be a wash-out period of at least 7 days between the test days.
Subjects will perform one simulated dive at each test day. They first descend in 2 min to a pressure of 4 bar (30 mt), stay for 20 min, the dive continues when they ascend to a pressure of 2 bar (10 mt) with another stay for 20 min. At both depths the 20 min periods are the measuring period to perform the test. At the end they will go to the surface according the decompression profile and stop for 3 min at 9 mt, 8 min at 6 mt and 23 min at 3 mt. These decompression stops are regular for the profile and necessary to prevent decompression sickness.Before and after diving, and at 2 and 4 bar, tests measuring attention, memory, psychomotor, concentration and comprehension ability of the participants are conducted.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
Noord Holland
-
Den Helder, Noord Holland, Netherlands, 1780CA
- Royal Netherlands Navy
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- male healthy volunteer
- He is aged between 18 and 55 years old
- BMI between 18 and 30
- Written informed consent
- Normal static binocular acuity, corrected or uncorrected
- Normal hearing
- Possession of a valid divers certificate and medical fit for diving
- Be considered as reliable and mentally capable of adhering to the protocol.
Exclusion Criteria:
- Female
- Current drug use
- Use of psychoactive medication, including antihistamines
- Prior enrolment in the same study
- Physical or mental illness
- Excessive alcohol use (>21 alcoholic drinks per week)
- Intake of caffeine-containing beverages over 5 glasses per day
- Smoker
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Placebo
|
a single oral dose
|
Experimental: Levocetirizine (5 mg)
|
a single oral dose of 5 mg
|
Active Comparator: Hydroxyzine (50 mg)
|
a single oral dose of 50 mg
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Number of errors on the cognitive tests
Time Frame: acute (up to 3.5 hours after treatment administration)
|
acute (up to 3.5 hours after treatment administration)
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Reaction speed on the cognitive tests
Time Frame: acute (up to 3.5 hours after treatment administration)
|
acute (up to 3.5 hours after treatment administration)
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: Joris Verster, PhD, Utrecht University
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 10-206G/E
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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