| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
 | 
| E.1.1.1 | Medical condition in easily understood language  | 
 | 
| E.1.1.2 | Therapeutic area  | Diseases [C] - Respiratory Tract Diseases [C08] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 15.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10001705 | 
 
| E.1.2 | Term  | Allergic asthma | 
 
| E.1.2 | System Organ Class  | 10038738 - Respiratory, thoracic and mediastinal disorders | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| To demonstrate the efficacy of ACT-129968 versus placebo on lung function. | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
- To explore the efficacy of different doses of ACT-129968 on lung function and symptoms of asthma.
 - To assess the tolerability and safety of ACT-129968.
 - To assess the pharmacokinetics (PK) of ACT-129968. | 
 
 
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| E.2.3 | Trial contains a sub-study  |  Yes  | 
| E.2.3.1 | Full title, date and version of each sub-study and their related objectives | 
A pharmacokinetic-cardiac monitoring (PK-CM) sub-study of approximately 120 patients will be conducted at selected centers. 
 In addition to cardiac monitoring and ECG, the pharmacokinetic profile of ACT-129968 will be determined.
 Another DNA testing sub-study will be performed to explore genetic variation in CRTH2. 
 The participation in both sub-studies will be optional. | 
 
 
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| E.3 | Principal inclusion criteria  | 
- Males and females aged 18 to 65 years.
 - Signed informed consent prior to any study-mandated procedure.
 - Women of childbearing potential must use adequate contraception.
 - Presenting with a diagnosis of asthma according to Global Initiative for Asthma (GINA) Guidelines.
 - Partially controlled asthma while using only rescue medication as needed. | 
 
 
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| E.4 | Principal exclusion criteria | 
- Pregnant or lactating women.
 - Diagnosis of aspirin or non-steroidal anti-inflammatory drug (NSAID)-induced 
   asthma.
 - History of life-threatening asthma at any time, defined as an asthma episode that 
   required intubation and/or was associated with hypercapnia, respiratory arrest or 
   hypoxic seizures.
 - Any asthma exacerbation requiring treatment with systemic corticosteroids within   
   the last 3 months.
 - Any hospital admission for asthma within the last 6 months.
 - Anti-IgE therapy (at any time).
 - Ongoing or recent treatment with medication for allergic airway disease (either 
    prescribed or over-the-counter [OTC]) other than an inhaled beta2 agonist used 
    solely as reliever therapy on an ‘as-needed’ basis. 
 - Smoking within the last year, or life-time consumption of 10 pack-years e.g., 20 cigarettes/day for 10 years.
 - Treatment with investigational asthma controller biological agents (recombinant  
   proteins or monoclonal antibodies) within 6 months prior to start of study drug. | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary endpoint is the change from baseline in FEV1 percentage of predicted (FEV1%oP) normal value.  | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
 | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  Yes  | 
| E.6.10 | Pharmacogenetic |  Yes  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  Yes  | 
| E.6.13.1 | Other scope of the trial description | 
 | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 4 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 5 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 30 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Australia | 
 
| Bulgaria | 
 
| Germany | 
 
| Hungary | 
 
| Israel | 
 
| Poland | 
 
| Russian Federation | 
 
| Serbia | 
 
| Singapore | 
 
| South Africa | 
 
| Sweden | 
 
| Ukraine | 
 
| United States | 
 
 
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| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 9 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 9 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |