| E.1 Medical condition or disease under investigation |
| E.1.1 | Medical condition(s) being investigated |
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| MedDRA Classification |
| E.1.2 Medical condition or disease under investigation |
| E.1.2 | Version | 9.1 |
| E.1.2 | Level | LLT |
| E.1.2 | Classification code | 10003553 |
| E.1.2 | Term | Asthma |
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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 |
| The principle objective of this study is to compare the bronchoprotection (protection against airway muscle spasm) offered by levosalbutamol and normal (racemic) salbutamol at peak (maximum) dose. |
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| E.2.2 | Secondary objectives of the trial |
1) We plan to examine how the different beta-2 receptor genotypes affect the bronchoprotection seen with both levosalbutamol and salbutamol. 2) We will also look at other measures of bronchodilatation using different breathing tests (spirometry). 3) We will measure the amount of beta-2 receptors on the participants' white cells, in order to gage the degree of receptor downregulation seen with both types of salbutamol (Bmax and Emax) 4) We will measure the maximal amount of salbutamol in the blood (Cmax) and the amount of time it takes to reach this (Tmax), and see if this varies between both preparations. 4) We will ask participants to fill in a symptom and peak flow diary to see how both inhalers affect symptoms. |
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| E.2.3 | Trial contains a sub-study | No |
| E.3 | Principal inclusion criteria |
1.Persistent stable asthmatics (FEV1 > 60%) on less than or equal to 2000 micrograms BDP or equivalent. 2.Methacholine responsive PC20 < 4 mg/ml with a 2dd shift in PC20 after 400ug of salbutamol. 3.Male or female aged 18 − 65 yrs. 4.Able to give informed consent. 5.Able to comply with the requirements of the protocol
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| E.4 | Principal exclusion criteria |
1. Severe asthmatics as defined by an FEV1 less than or equal to 60% or PEF variability >30% or with continual daytime or nocturnal symptoms. 2. The use of oral corticosteroids within the preceding 3 months. 3. Recent respiratory tract infection (within preceding 2 months). 4. Significant concomitant respiratory disease such as COPD, CF, ABPA, bronchiectasis and active pulmonary TB. 5. Any other clinically significant medical condition such as unstable angina, acute myocardial infarction in the preceding 3 months, recent TIA/CVA, that may endanger the health or safety of the participant, or jeopardise the protocol. 6. Any significant abnormal laboratory result as deemed by the investigators. 7. Pregnancy, planned pregnancy or lactation. 8. Known or suspected contra−indication to any of the IMPs. 9. Concomitant use of medicines (prescribed, over−the−counter or herbal) that may interfere with the trial
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| E.5 End points |
| E.5.1 | Primary end point(s) |
| The primary endpoint is the bronchoprotection to methacholine determined as a doubling dilution change from baseline of log2 PC20 performed 30 minutes after a single and chronic doses of racemic salbutamol, levosalbutamol and placebo in asthmatic subjects. |
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| 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 | Yes |
| E.6.4 | Safety | No |
| E.6.5 | Efficacy | No |
| E.6.6 | Pharmacokinetic | Yes |
| E.6.7 | Pharmacodynamic | No |
| E.6.8 | Bioequivalence | No |
| E.6.9 | Dose response | No |
| E.6.10 | Pharmacogenetic | No |
| E.6.11 | Pharmacogenomic | No |
| E.6.12 | Pharmacoeconomic | No |
| E.6.13 | Others | No |
| 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) | No |
| E.7.3 | Therapeutic confirmatory (Phase III) | No |
| E.7.4 | Therapeutic use (Phase IV) | Yes |
| E.8 Design of the trial |
| E.8.1 | Controlled | Yes |
| E.8.1.1 | Randomised | Yes |
| E.8.1.2 | Open | Information not present in EudraCT |
| E.8.1.3 | Single blind | Information not present in EudraCT |
| E.8.1.4 | Double blind | Yes |
| E.8.1.5 | Parallel group | Yes |
| E.8.1.6 | Cross over | Yes |
| E.8.1.7 | Other | Information not present in EudraCT |
| E.8.2 | Comparator of controlled trial |
| E.8.2.1 | Other medicinal product(s) | Information not present in EudraCT |
| E.8.2.2 | Placebo | Yes |
| E.8.2.3 | Other | Information not present in EudraCT |
| E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
| E.8.4 | The trial involves multiple sites in the Member State concerned | No |
| E.8.5 | The trial involves multiple Member States | No |
| E.8.6 Trial involving sites outside the EEA |
| E.8.6.1 | Trial being conducted both within and outside the EEA | No |
| E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT |
| E.8.7 | Trial has a data monitoring committee | No |
| 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
|
| The study will end when the last enrolled participant completes the study. The participants retain their right to withdraw from the study at any point without giving a reason. This will be made clear in the information provided, and at the time of obtaining informed consent. |
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| 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 | 6 |
| E.8.9.1 | In the Member State concerned days | 0 |