A Randomized Study To Evaluate The Efficacy And Safety Of An Investigational Drug In Adolescent And Adult Subjects With Persistent Asthma.

A Randomized, Double-Blind, Placebo-Controlled, Parallel Group, Multicenter Study to Evaluate
the Efficacy and Safety of GW685698X 200mcg Twice Daily, GW685698X 200mcg and 400mcg Once
Daily in the Morning, and GW685698X 200mcg and 400mcg Once Daily in the Evening Compared with
Placebo for 8 Weeks in Adolescent and Adult Subjects (12 Years of Age and Older) with
Persistent Asthma.

Inclusion criteria:

- Type of Subject: Outpatient

- Age: 12 years of age or older at Visit 1 (or ³18 years of age or older if local
regulations or the regulatory status of study medication permit enrollment of adults
only).

- Gender: Male or eligible female - Females are eligible to participate only if they are
currently non-pregnant and non-lactating. To be eligible for entry into the study,
females of childbearing potential must commit to consistent and correct use of an
acceptable method of birth control, as defined by the following: Male partner who is
sterile prior to the female subject's entry into the study and is the sole sexual
partner for that female subject, Implants of levonorgestrel, Injectable progestogen,
Oral contraceptive (either combined estrogen/progestin or progestin only), Any
intrauterine device (IUD) with a documented failure rate of less than 1% per year,
Double-barrier method - spermicide plus a mechanical barrier (e.g., spermicide plus a
male condom or a spermicide and female diaphragm), The contraceptive transdermal
patch, Ortho Evra (if the subject is less than 198 pounds), Female subjects should not
be enrolled if they plan to become pregnant during the time of study participation. A
urine pregnancy test is required for all subjects at all visits, Female subjects
should not be enrolled if they plan to become pregnant during the time of study
participation. A urine pregnancy test is required for all subjects at all visits,
Female subjects should not be enrolled if they plan to become pregnant during the time
of study participation. A urine pregnancy test is required for all subjects at all
visits, Females of childbearing potential who are not sexually active must commit to
complete abstinence from intercourse throughout the clinical trial, and for a period
after the trial to account for elimination of the drug (minimum of six days),

- Asthma Diagnosis: Asthma as defined by the National Institutes of Health [National
Institutes of Health, 2002; GINA, 2005].

- Severity of Disease: A best AM FEV1 of 50% to 80% of the predicted value during Visit
1 based on the "Standardization of Lung Function Tests" [European Respiratory Society,
1993] standards for 18 years and older or Polgar [Polgar, 1971] standards for 12 to 17
years and race adjusted for African-Americans [American Thoracic Society, 1991].

- Reversibility of Disease: Demonstrated ³12% and 200mL reversibility of FEV1 within 30
minutes following 200 to 400mcg of albuterol/salbutamol inhalation aerosol (or one
nebulized albuterol/salbutamol treatment) at Visit 1. If a subject fails to
demonstrate an increase in FEV1 of ³12% and 200mL, the subject is not eligible for the
study and will not be allowed to re-screen.

- Concurrent Anti-Asthma Therapy: Subjects must be using an inhaled corticosteroid for
at least 3 months prior to Visit 1 and be maintained on a stable dose for four weeks
prior to Visit 1 at one of the following doses: Anti-Asthma Therapy Maximum Daily Dose
(mcg/day) Fluticasone propionate MDI CFC/HFA ≤220mcg1/≥250mcg2 Fluticasone propionate
DPI 200mcg Beclomethasone dipropionate 420mcg1/500mcg2 Beclomethasone dipropionate HFA
160mcg1/200mcg2 Budesonide DPI 400mcg Flunisolide 1000mcg Triamcinolone acetonide
1000mcg Mometasone furoate 200mcg Ciclesonide 160mcg1/200mcg2

1. Ex-actuator dose: dose delivered to the lungs

2. Ex-valve dose: dose expressed from the valve

- Short-Acting Beta2-Agonist: All subjects must be able to replace short-acting
beta2-agonists with albuterol/salbutamol inhalation aerosol at Visit 1 for use
as-needed for the duration of the study. Subjects must be able to withhold all inhaled
short-acting beta-sympathomimetic bronchodilators for at least 6 hours prior to study
visits.Note: Nebulized albuterol/salbutamol will not be allowed during the study with
the exception of its use during reversibility testing at Visit 1. The use of
albuterol/salbutamol through the DISKUS/ACCUHALER device will not be allowed during
the study.

- Informed Consent: All subjects must be able and willing to give written informed
consent to take part in the study.

- Compliance: Subjects must be able to comply with all the study requirements.

Exclusion criteria:

- History of Life-Threatening Asthma: History of life-threatening asthma, defined as an
asthma episode that required intubation and/or was associated with hypercapnia,
respiratory arrest or hypoxic seizures.

- Anti-Asthma Medications: Asthma medications listed below must not have been used prior
to Visit 1 for the required interval listed below, and not taken during the study:
Within 24 hours of Visit 1: Oral short-acting beta2-agonists: Within 2 weeks of Visit
1:Combination therapy containing inhaled beta2-agonists and ICS for asthma (e.g.,
fluticasone propionate/salmeterol combination, budesonide/formoterol
combination);Slow-release bronchodilators (e.g., aminophylline,
theophylline);Anticholinergics; Long-acting beta2-agonists (e.g., salmeterol);
Ketotifen; Nedocromil sodium; Sodium cromoglycate; Oral long-acting beta2-agonists.
Within 4 weeks of Visit 1: Anti-leukotrienes including suppressors of leukotriene
production and antagonists. Within 12 weeks of Visit 1: Systemic, oral, parenteral, or
depot corticosteroids; Anti-IgE (e.g., omalizumab).

- Other Medications: The medications listed below must not have been used prior to Visit
1 for the required interval indicated below, and not taken during the study: Within 4
weeks of Visit 1: Known potent inhibitors of CYP3A4 (e.g., ritonavir, ketoconazole)

- Respiratory Infection: History of a respiratory tract infection within 4 weeks of
Visit 1. In addition, the subject must be excluded, if such infection occurs between
Visits 1 and 2.

- Asthma Exacerbation: History of a an asthma exacerbation within 4 weeks of Visit 1,
any asthma exacerbation requiring oral corticosteroids within 3 months of Visit 1, or
any hospitalization due to asthma exacerbation within 6 months of Visit 1.

- Investigational Medications: A subject must not have used any investigational drug
within 30 days prior to Visit 1 or within ten half-lives (t1/2) of the prior
investigational study (which ever is longer of the two) or concurrently during the
study.

- Concurrent Diseases/Abnormalities: Historical or current evidence of clinically
significant uncontrolled disease including, but not limited to: cardiovascular
disease, malignancy, hepatic disease, renal disease, hematological disease,
neurological disease, or pulmonary disease (including, but not confined to chronic
bronchitis, emphysema, bronchiectasis with the need of treatment, cystic fibrosis,
bronchopulmonary dysplasia, and chronic obstructive pulmonary disease). Significant is
defined as any disease that, in the opinion of the investigator, would put the safety
of the subject at risk through participation, or which would affect the efficacy or
safety analysis if the disease/condition exacerbated during the study.

- Oropharyngeal Examination: A subject will not be eligible for the run-in if he/she has
evidence of oropharyngeal candidiasis at Visit 1.

- Drug Allergy: Any adverse reaction including immediate or delayed hypersensitivity to
any beta2-agonist, sympathomimetic drug, or any intranasal, inhaled, or systemic
corticosteroid therapy.

- Milk Protein Allergy: History of severe milk protein allergy.

- Immunosuppressive Medications: A subject must not be using, or require use of,
immunosuppressive medications during the study.

Note: Immunotherapy for the treatment of allergies is allowed during the study provided
that it was initiated prior to Visit 1 and the subject is maintained on a stable daily dose
throughout the study period.

- Attendance: A subject will not be eligible if he/she or his/her parent or legal
guardian has any infirmity, disability, or geographical location which seems likely
(in the opinion of the Investigator) to impair compliance with any aspect of this
study protocol or scheduled visits to the study center and compliance with study
medication or procedures (e.g., completion of daily diary). Neurological or
psychiatric disease or history of drug or alcohol abuse which would interfere with the
subject's proper completion of the protocol requirements excludes study participation.

- Tobacco Use: A subject may not have used tobacco products within the past one year
(i.e., cigarettes, cigars, or pipe tobacco) and must not have historical use of >10
pack years (e.g., 20 cigarettes/day for 10 years).

- Affiliation with Investigator's Site: A subject will not be eligible for this study if
he/she is an immediate family member of the participating investigator,
sub-investigator, study coordinator, or employee of the participating investigator.