E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
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E.1.1.1 | Medical condition in easily understood language |
Allergic inflammation of the nose |
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E.1.1.2 | Therapeutic area | Diseases [C] - Ear, nose and throat diseases [C09] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 14.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10001723 |
E.1.2 | Term | Allergic rhinitis |
E.1.2 | System Organ Class | 100000004855 |
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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 |
What are the effects of chronic alpha blocker use on nasal blockage in patients with allergic rhinitis(allergic inflammation of the nose)? |
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E.2.2 | Secondary objectives of the trial |
Assessing the effects of chronic alpha blocker use in terms of the response to nasal decongestants and nasal hyperreactivity. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Able to provide informed consent Able to comply with the requirements of the protocol Diagnosis of allergic rhinitis Ability to tolerate Doxazosin XL 4mg without clinically significant drop in blood pressure Peak nasal inspiratory flow which is reversible to more than 20 l/min with oxymetazoline Positive skin prick test to at least 1 common aeroallergen Ability to withhold antihistamines for duration of the study Agreement for their GP to be made aware of study participation and to receive feedback as relevant to the participant’s well being |
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E.4 | Principal exclusion criteria |
Pregnancy, planned pregnancy or lactation Respiratory tract infection in the previous 2 months Nasal polyps of more than Grade 1 on nasal endoscopy Any known adverse reaction to the Investigational Medicinal Product or other quinazolines Known hepatic dysfunction (as no safety data available for this) Systolic blood pressure <100mmHg Any degree of heart block Any clinically significant medical condition that may endanger the health or safety of the participant or jeopardise the protocol Participation within another trial within the last 30 days Under the age of 18 Benign hyperplasia, chronic urinary tract infections, bladder stones, overflow bladder, anuria or progressive renal failure History of oesophageal or gastrointestinal obstruction or decreased lumen diameter of the gastrointestinal tract. Concomitant use of PDE5 inhibitors (sildenafil etc.) Alpha antagonists - this is the medication under investigation Other cardiovascular medications including but not limited to: ACE inhibitors, Angiotensin II antagonists, Beta blockers, calcium channel blockers, diuretics, nitrates, phosphodiesterase type-5 inhibitors or other vasodilating medications – these in combination with doxazosin carry an increased risk of symptomatic hypotension Monoamine oxidase inhibitors (MAOIs) – antidepressant medication that can lead to significant hypotension in combination with alpha antagonists Anxiolytics and hypnotics - enhanced hypotensive and sedative effects when alpha-blockers given in combination with these. Methyldopa and levodopa – potential enhanced hypotensive effect with alpha antagonists Nasal corticosteroid spray – would confound study outcomes Oxymetazoline - this is used as an outcome of response in the study Antihistamines - the participants will be undergoing a histamine nasal challenge Sympathomimetics i.e. dopamine, ephedrine, epinephrine, metaraminol, methoxamine, phenylephrine- may reduce the effect of Doxazosin Any other medication, which in the opinion of the Investigator may put the participant at risk |
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E.5 End points |
E.5.1 | Primary end point(s) |
The primary outcome is the change in peak nasal inspiratory flow from baseline after acute and chronic dosing of doxazosin compared to placebo. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
At baseline, 12 hours post acute (first) dosing and 3 to 5 weeks for the chronic dosing for each treatment period. |
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E.5.2 | Secondary end point(s) |
Nasal histamine challenge Nasal airways resistance Nasal nitric oxide Oxymetazoline dose response curve Domiciliary peak nasal inspiratory flow measurements Juniper Rhinoconjunctivitis Quality of Life Questionnaire Total Nasal Symptoms 4 point scale Nasal blockage 10 point visual analogue scale |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
At baseline, 12 hours post acute (first) dosing and 3 to 5 weeks for the chronic dosing for each treatment period. |
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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 | Yes |
E.6.6 | Pharmacokinetic | No |
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 | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | Yes |
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.8.3 |
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 | No |
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
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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 | 2 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 1 |
E.8.9.2 | In all countries concerned by the trial years | 2 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 1 |