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AsthmaPhase 2NCT00857857

A Study to Evaluate the Effect of GW870086X on Allergen Challenge in Mild Asthmatics

A Phase 2 study testing GW870086X and FP in people with Asthma, run by GlaxoSmithKline at 4 sites in Germany.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The study will measure the early and late asthamtic response using an allergen challenge. This study will evaluate the safety and patients tolerance to repeat inhaled doses of GW870086X using a number of clinical and biological markers. Read more about this study

Who is it for?
Ages 18 to 65 years, men only
Conditions the study is for
Asthma
What is being tested?
GW870086X and FP
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
24 participants
Where
4 sitesGermany
Study dates
16 Feb 2009to 3 Nov 2009
Phase
Phase 2
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 65 years
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male subjects between 18 and 65 years of age inclusive.
  • Male subjects must agree to use one of the contraception methods listed in Section 8. This criterion must be followed from the time of the first dose of study medication until 90-95 hours post-last dose.
  • BMI within the range 19.0 - 29.0 kg/m2 (inclusive).
  • Liver function tests (bilirubin, AST, ALT) within normal laboratory parameters at screening.
  • Documented history of bronchial asthma, first diagnosed at least 6 months prior to the screening visit and currently being treated only with intermittent short-acting beta -agonist therapy by inhalation.
  • Pre-bronchodilator FEV1 >65% of predicted at screening.
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  • No history of smoking within 6 months of the start of the study, and with a total pack year history of <= 10 pack years
  • Demonstration of a positive wheal and flare reaction (>= 3 mm relative to negative control) to at least one allergen from a battery of allergens (including but not limited to house dust mite, grass pollen, cat dander, hazel, horse and birch) on skin prick testing at screening, or within 12 months of study start.
  • Screening allergen challenge demonstrates that the subject experiences both an early and late asthmatic response. The early asthmatic response must include a fall in FEV1 of >= 20% from the post saline value, on at least one occasion, between 5 and 30 minutes after the final concentration of allergen. The late asthmatic response must include a fall in FEV1 of >= 15% from the post saline value, on at least three occasions, two of which must be consecutive, between 4 and 10 hours after the final concentration of allergen.
  • Reproducible allergen challenge at screening (confirmation of the dose ascending allergen challenge by a bolus allergen challenge at least 14 days later).
  • Sensitivity to methacholine with a provocative concentration of methacholine resulting in a 20% fall in FEV1 (PC20 methacholine) of <8 mg/mL at screening.
  • Subjects who are able to produce acceptable induced sputum samples (as defined in the Study Procedures Manual).
  • Be able to give written informed consent, which includes compliance with the requirements and restrictions listed in the consent form.
  • Single QTcB or QTcF < 450 msec; or QTc < 480 msec in subjects with Bundle Branch Block.

Who cannot join

  • Past or present disease, which as judged by the investigator, may affect the outcome of this study. These diseases include, but are not limited to, cardiovascular disease, malignancy, hepatic disease, renal disease, haematological disease, neurological disease, endocrine disease or pulmonary disease (including but not confined to chronic bronchitis, emphysema, bronchiectasis or pulmonary fibrosis).
  • Clinically significant abnormalities in safety laboratory analysis at screening.
  • Subject has known history of hypertension or is hypertensive at screening. Hypertension at screening is defined as persistent systolic BP >140mmHg or diastolic BP > 90mmHg.
  • Respiratory tract infection and/or exacerbation of asthma within 4 weeks prior to the first dose of study medication.
  • History of life-threatening asthma, defined as an asthma episode that required intubation and/or was associated with hypercapnoea, respiratory arrest and/or hypoxic seizures.
  • Administration of oral, injectable or dermal steroids within 4 weeks or intranasal and/or inhaled steroids within 2 week of the screening visit.
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  • The subject has a positive pre-study drug/alcohol screen. A minimum list of drugs that will be screened for include amphetamines, barbiturates, cocaine, opiates, cannabinoids and benzodiazepines.
  • A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 months of screening.
  • A positive test for HIV antibody.
  • History of regular alcohol consumption within 6 months of the study defined as:
  • an average weekly intake of greater than 21 units or an average daily intake of greater than 3 units (males). One unit is equivalent to a half-pint (220mL) of beer or 1 (25ml) measure of spirits or 1 glass (125ml) of wine.
  • The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
  • Exposure to more than four new chemical entities within 12 months prior to the first dosing day.
  • Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication, unless in the opinion of the Investigator and GSK Medical Monitor the medication will not interfere with the study procedures or compromise subject safety. Paracetamol is an exception and will be permitted at daily doses of up to 4 g from screening to follow-up.
  • Has taken Xanthines (including theophylline, but not including caffeine), anticholinergics, cromoglycates and/or long-acting beta-agonists within 1 week prior to screening and is unable to abstain from them throughout the study.
  • Unable to abstain from other medications including non-steroidal anti-inflammatory drugs (NSAIDs), anti-depressant drugs, anti-histamines and anti-asthma (not including steroids), anti-rhinitis or hay fever medication, other than short acting inhaled beta-agonists and paracetamol (up to 4 g per day) for the treatment of minor ailments eg headache from 7 days before screening until the follow-up visit.
  • Unable to abstain from medication or supplements that significantly inhibit the cytochrome P450 subfamily enzyme CYP3A4, including ritonavir and ketoconazol from screening and throughout the study.
  • Unable to use the DISKHALER and/or DISKUS device correctly.
  • History of being unable to tolerate or complete methacholine or allergen challenge tests.
  • If, after 2 concurrent administrations of saline during the allergen challenge at screening the subjects still have a fall in FEV1 of greater than 10%.
  • Subject is undergoing allergen desensitisation therapy.
  • History of sensitivity to any of the study medications (including lactose), or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation.
  • Where participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56 day period.
  • Unwillingness or inability to follow the procedures outlined in the protocol.
  • Subjects who are kept due to regulatory or juridical order in an institution.
  • Urinary cotinine levels indicative of smoking or history or regular use of tobacco- or nicotine-containing products within 3 months prior to screening.
  • Consumption of red wine, seville oranges, grapefruit or grapefruit juice and/or pummelos, exotic citrus fruits, grapefruit hybrids or fruit juices from 7 days prior to the first dose of study medication.

Trial locations and contacts

4 sites in 1 country.

Germany4 sites

  • GSK Investigational Site

    Berlin, 14050

  • GSK Investigational Site

    Großhansdorf, Schleswig-Holstein, 22927

  • GSK Investigational Site

    Hanover, Lower Saxony, 30625

  • GSK Investigational Site

    Wiesbaden, Hesse, 65187

Other trials in Germany

About this study

Official title: A Randomised, Placebo-controlled, Incomplete Block, Three-way Cross-over Study to Evaluate the Effect of Treatment With Repeat Inhaled Doses of GW870086X on the Allergen-induced Early and Late Asthmatic Response in Subjects With Mild Asthma

The study will measure the early and late asthamtic response using an allergen challenge. This study will evaluate the safety and patients tolerance to repeat inhaled doses of GW870086X using a number of clinical and biological markers.

Conditions
Asthma
Being tested
GW870086X, FP, Placebo
Keywords
asthma, late phase response, allergen, challenge, GW870086X
Medical subject headings
Asthma

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • GW870086XDrug

    Investigational product

  • FPDrug

    Positive control

  • PlaceboDrug

    Placebo control

Study groups in NCT00857857
Study groupRoleWhat they receive
13 day repeat doseExperimentalNot described
Receives: Drug: GW870086X; Drug: FP; Drug: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Late Asthmatic Response (LAR): Minimum FEV1 Between 4-10 Hours After Allergen Challenge on Day 13 of Each Treatment Period

    Analyzed using a mixed effects model including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. Absolute change from saline Baseline was calculated for each participant and time point as value equal to highest challenge value minus highest saline value. Minimum FEV1 over 4-10 hours post allergen challenge was minimum value of all the post-saline time points between 4 to 10 hours (4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 and 10 hours). The adjusted mean is presented as least square mean (LSM).

    Measured: 4-10 hours after allergen challenge on Day 13 of each treatment period

Secondary outcomes (26)

  1. LAR: Weighted Mean FEV1 Between 4-10 Hours After Allergen Challenge on Day 13 of Each Treatment Period.

    Analyzed using a mixed effects model including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline was defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. Absolute change from saline Baseline was calculated for each participant and time point as value equal to highest challenge value minus highest saline value. Weighted mean LAR was calculated for FEV1 over 4-10 hours (4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 and 10 hours) post allergen challenge using the linear trapezoidal rule. To calculate weighted mean LAR, all FEV1 values recorded after the administration of rescue medication have been set to the last recorded FEV1 value prior to the administration of rescue medication. The adjusted mean is presented as Least square mean (LSM).

    Measured: 4-10 hours after allergen challenge on Day 13 of each treatment period

  2. EAR: Minimum FEV1 and Weighted Mean FEV1 Between 0-2 Hours After Allergen Challenge on Day 13 of Each Treatment Period.

    Analyzed using a mixed effects model including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline was defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. Absolute change from saline Baseline was calculated for each participant and time point as value equal to highest challenge value minus highest saline value. Minimum FEV1 over 0-2 hrs post-allergen challenge (minimum EAR) was the minimum value of all the post-(bolus) allergen challenge. Weighted mean EAR was calculated for FEV1 over 0-2 hours post allergen challenge using the linear trapezoidal rule. It was measured up to and including 2 hours (5, 10, 15, 20, 30, 45 minutes and 1, 1.5 and 2 hours). The adjusted mean is presented as LSM.

    Measured: 0-2 hours after challenge on Day 13 of each treatment period (approximately 17 weeks)

  3. Concentration of Exhaled NO Pre-dose on Day 13 of Each Treatment Period

    Exhaled NO concentration data collected on Day 13 (pre-dose) was log transformed and analysed using a mixed effects model including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline was defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. The adjusted mean is presented.

    Measured: Day 13 of each treatment period (approximately 17 weeks)

  4. Concentration of Exhaled NO Post-dose on Day 13 of Each Treatment Period

    Exhaled NO concentration data collected on Day 13 (2 and 12 hours post-dose) and was measured 3 times at each time point. The outcome was not assessed and data not reported.

    Measured: Day 13 of each treatment period (approximately 17 weeks)

  5. Number of Participants With Adverse Events (AE), Treatment Emergent Adverse Events (TEAE) and Serious Adverse Events (SAE)

    An AE was defined as any untoward medical occurrence (MO) in a participant temporally associated with the use of a medicinal product (MP), whether or not considered related to the MP and can therefore be any unfavourable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with its use. The SAE was any untoward MO that, at any dose, results in death, life threatening, persistent or significant disability/incapacity, results in or prolongs inpatient hospitalization, congenital abnormality or birth defect, that may not be immediately life-threatening or result in death or hospitalization but may jeopardize the participant or may require medical or surgical intervention to prevent one of the other outcomes listed in this definition.

    Measured: Up to 17 weeks

  6. Mean Values for Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)

    Participants were required to rest in the supine position for at least 10 minutes before each reading. SBP and DBP was measured on Day 1 (pre-dose and 1 hour post dose), Day 7 (any time post morning dose), Day 13 (pre allergen challenge [pre saline]) and Day 14 (pre and 1 hour post methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  7. Mean Values for Heart Rate

    Participants were required to rest in the supine position for at least 10 minutes before each reading. Heart rate was measured on Day 1 (pre-dose and 1 hour post dose), Day 7 (any time post morning dose), Day 13 (pre allergen challenge) and Day 14 (pre and 1 hour post methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  8. Number of Participants With Electrocardiogram (ECG) Findings

    Single 12-lead ECGs were obtained at each time point during the study using an ECG machine that automatically calculated the heart rate and measures PR, QRS, QT, and QTc intervals. It was measured on Day 1 (pre-dose and 1 hour post dose) and Day 14 (pre and 1 hour post methacholine challenge). Participants with normal (Nr), abnormal not clinically significant (ANCS) and abnormal clinically significant (ACS) ECG was presented.

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  9. Change From Baseline in FEV1-allergen Challenge at Each Time Point

    A mixed model analysis was performed separately for each planned time point during the allergen challenge on Day 13, from 5 minutes to 10 hour, including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline was defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. Absolute change from saline Baseline was calculated for each participant and time point as value equal to highest challenge value minus highest saline value. FEV1 was measured at 5, 10, 15, 20, 30, 45 minutes and 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 and 10 hours. The adjusted mean is presented as LSM.

    Measured: Up to Day 13 of each treatment period (approximately 17 weeks)

  10. Mean Laboratory Values for Platelet, White Blood Cells (WBC), Neutrophils, Lymphocytes, Monocytes, Eosinophils and Basophils

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  11. Change From Baseline in FEV1-non Allergen Challenge

    Non-allergen challenge FEV1 data was measured on Day 1, 7, 13 and 14. The FEV1 assessments on Day 1 was taken at pre-dose and those on Day 7 was taken post-dose. On Day 13, the pre-allergen challenge FEV1 values was used and on Day 14 the pre-methacholine challenge FEV1 values was used. Absolute change in FEV1 on Day 7, 13 and 14 from pre-dose FEV1 was analyzed separately using a mixed-effects ANOVA model. Period-level Baseline was defined as the difference between the Day 1 pre-dose value and participant-level Baseline for each period, each participant. The change from Baseline was calculated by subtracting the Baseline value from the individual post-randomization value. Post-randomization values refer to assessments performed post dose and after the Baseline assessment. The adjusted mean is presented as LSM.

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  12. Mean Laboratory Values for Hemoglobin and Mean Corpuscle Hemoglobin Concentration (MCHC)

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  13. Mean Laboratory Values for Hematocrit

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  14. Mean Laboratory Values for Mean Corpuscle Hemoglobin (MCH)

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  15. Mean Laboratory Values for Mean Corpuscle Volume (MCV)

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  16. Mean Laboratory Values for Reticulocytes

    Blood samples for assessment of hematology was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  17. Mean Laboratory Values for Albumin and Total Protein

    Blood samples for assessment of clinical chemistry was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  18. Mean Laboratory Values for Alkaline Phosphatase (ALP), Alanine Amino Transferase (ALT), Aspartate Amino Transferase (AST) and Gamma Glutamyl Transferase (GGT)

    Blood samples for assessment of clinical chemistry was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge). Liver safety parameters (ALT and AST) were also assessed on Day 7 (pre-dose).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  19. Mean Laboratory Values for Total Bilirubin, Direct Bilirubin and Creatinine

    Blood samples for assessment of clinical chemistry was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge). Total bilirubin and direct bilirubin were also assessed on Day 7 (pre-dose).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  20. Mean Laboratory Values for Calcium, Glucose, Potassium, Chloride and Sodium

    Blood samples for assessment of clinical chemistry was collected on Day 1 (pre-dose) and Day 14 (pre methacholine challenge).

    Measured: Up to Day 14 of each treatment period (approximately 17 weeks)

  21. Provocative Concentration of Methacholine Resulting in a 20% Reduction in FEV1 (PC20) on Day 14 of Each Treatment Period.

    Methacholine challenge PC20 data the concentration of methacholine to cause >= 20% decrease (that is change <= -20%) in FEV1 compared with saline [Baseline]) was log transformed and analysed using a mixed effects model including covariates for participant level Baseline FEV1 and period level Baseline FEV1. Participant level Baseline was defined as the mean of Day 1 pre-dose values across periods for each participant and period level Baseline as the difference between the Day 1 pre-dose value and participant level Baseline for each period. The PC20 was obtained by linear interpolation (on the log 2 concentration scale) between the lowest concentration of methacholine that caused at least 20% decrease from Baseline and the preceding concentration. The adjusted mean is presented as LSM.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

  22. Assessment of Established Markers of Anti-inflammatory Activity in Sputum on Day 14-cell Counts of Eosinophils and Neutrophils

    Sputum induction was performed during each treatment period for biomarker analysis 1-2 hour after the methacholine challenge on Day 14. Sputum samples were collected from a minimum of 10 participants in the study.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

  23. Assessment of Established Markers of Anti-inflammatory Activity in Sputum on Day 14-myeloperoxidase (MPO)

    Sputum induction was performed during each treatment period for biomarker analysis 1-2 hour after the methacholine challenge on Day 14. Sputum samples were collected from a minimum of 10 participants in the study.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

  24. Assessment of Established Markers of Anti-inflammatory Activity in Sputum on Day 14-interleukin-8 (IL-8)

    Sputum induction was performed during each treatment period for biomarker analysis 1-2 hour after the methacholine challenge on Day 14. Sputum samples were collected from a minimum of 10 participants in the study.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

  25. Assessment of Established Markers of Anti-inflammatory Activity in Sputum on Day 14-total Protein

    Sputum induction was performed during each treatment period for biomarker analysis 1-2 hour after the methacholine challenge on Day 14. Sputum samples were collected from a minimum of 10 participants in the study.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

  26. Number of Participants With Established Markers of Anti-inflammatory Activity in Sputum on Day 14-messenger Ribonucleic Acid (mRNA)

    Sputum induction was performed during each treatment period for biomarker analysis 1-2 hour after the methacholine challenge on Day 14. Sputum samples were collected from a minimum of 10 participants in the study. The outcome is not assessed.

    Measured: Day 14 of each treatment period (approximately 17 weeks)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted9 Mar 2009 (estimated)
  2. Study start16 Feb 2009
  3. Primary completion3 Nov 2009
  4. Study completion3 Nov 2009

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Crossover
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
24 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00857857
Sponsor's protocol ID
110762
Status last verified
Aug 2017
First submitted
5 Mar 2009
Last updated
20 Feb 2018
Data monitoring committee
No
Individual data sharing
Yes: Patient-level data for this study will be made available through www.clinicalstudydatarequest.com following the timelines and process described on this site.

Publications

  • Bareille P, Allen A, Hardes K, Donald A. Effect of repeat inhaled doses of GW870086 on the allergen-induced early and late asthmatic response in subjects with mild asthma. Curr Drug Ther. 2013;8(2)

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing GW870086X and FP in people with Asthma, run by GlaxoSmithKline at 4 sites in Germany.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 14 inclusion and 27 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 20 Feb 2018. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 4 sites in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 20 Feb 2018). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Late Asthmatic Response (LAR): Minimum FEV1 Between 4-10 Hours After Allergen Challenge on Day 13 of Each Treatment Period (time frame: 4-10 hours after allergen challenge on Day 13 of each treatment period). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00857857, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Feb 2018.

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