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Effects of Caffeine on Methacholine Challenge and Exhaled Nitric Oxide Levels.

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01057875
Recruitment Status : Completed
First Posted : January 27, 2010
Last Update Posted : October 7, 2010
Information provided by:
University of Saskatchewan

Brief Summary:
To investigate whether or not the ingestion of caffeine with alter airway responsiveness to methacholine and/or change the level of exhaled nitric oxide.

Condition or disease Intervention/treatment Phase
Asthma Other: caffeine Other: No caffeine Not Applicable

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 15 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Single (Participant)
Primary Purpose: Treatment
Official Title: The Effects of Caffeine on Exhaled Nitric Oxide Levels and Methacholine PC20
Study Start Date : January 2010
Actual Primary Completion Date : February 2010
Actual Study Completion Date : February 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Caffeine

Arm Intervention/treatment
Experimental: coffee with caffeine Other: caffeine
Starbuck's Grande Pike Roast coffee

Placebo Comparator: decaffeinated coffee
Starbuck's Grande Pike Roast Decaf
Other: No caffeine
Starbuck's Grande Pike Roast Decaffeinated Coffee

Primary Outcome Measures :
  1. methacholine pc20 [ Time Frame: 1 hour post ingestion ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • clinical diagnosis of asthma
  • FEV1 greater than 65%

Exclusion Criteria:

  • asthma is poorly controlled
  • presence of other airway disease (e.g. COPD)

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01057875

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Canada, Saskatchewan
University of Saskatchewan
Saskatoon, Saskatchewan, Canada, S7N 0W8
Sponsors and Collaborators
University of Saskatchewan
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Principal Investigator: Donald W Cockcroft, MD University of Saskatchewan
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Donald Cockcroft, MD, University of Saskatchewan Identifier: NCT01057875    
Other Study ID Numbers: BIO REB 09-186
First Posted: January 27, 2010    Key Record Dates
Last Update Posted: October 7, 2010
Last Verified: October 2010
Additional relevant MeSH terms:
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Central Nervous System Stimulants
Physiological Effects of Drugs
Phosphodiesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Purinergic P1 Receptor Antagonists
Purinergic Antagonists
Purinergic Agents
Neurotransmitter Agents