Table of contents
- Clinical trials overview
- Birch pollen allergy study
- Epidermolysis bullosa study
- Who can participate
- Main outcomes being measured
- Trial status and size
Clinical trials overview
The trial data show two Phase 3 studies that include Rupatadine in the intervention lists.[1][2] Both studies are interventional, which means researchers assign treatments and then measure results.[1][2]
One study is in people with severe inherited skin disease, and the other is in people with birch pollen-related allergy symptoms.[1][2] In both trials, Rupatadine appears among several study medicines or comparators rather than as the only focus.[1][2]
Birch pollen allergy study
The completed multicentre trial studied adolescents and adults with birch pollen-induced allergic rhinitis or allergic rhinoconjunctivitis.[2] These conditions mean allergy symptoms that affect the nose, and sometimes both the nose and the eyes.[2]
This study was described as prospective, randomized, double-blind, and placebo-controlled, which means people were followed forward in time, assigned by chance, and compared with a placebo in a way that reduced bias.[2] The main goal was to assess the clinical impact of T502 treatment during the peak birch pollen season, using the mean daily Combined Symptom and Medication Score (CSMS).[2]
Rupatadine was listed among the interventions in this study, together with several allergy medicines, eye drops, nasal sprays, and placebo.[2] The trial also included a mannan-conjugated birch pollen allergoid, which is the main investigational treatment named in the study title and summary.[2]
Epidermolysis bullosa study
The authorised Phase 3 study NCT05464381 is investigating treatment for Recessive Dystrophic Epidermolysis Bullosa (RDEB) and Junctional Epidermolysis Bullosa (JEB).[1] These are rare inherited skin disorders that cause very fragile skin and painful wounds.[1]
The study aims to compare the safety and efficacy of allo-APZ2-OTS given by vein in people with RDEB against placebo.[1] It also includes an additional open-label arm, which means the treatment is given without blinding, to study safety and efficacy in people with JEB and in RDEB patients younger than 1 year.[1]
Rupatadine is listed in the intervention set for this study together with placebo and many other medicines, including antihistamines, steroids, and other supportive treatments.[1] The trial data do not say that Rupatadine is the main study drug, but they show it is part of the broader treatment list being tracked in the trial.[1]
Who can participate
Eligibility depends on the study.[1][2] In the allergy study, participants are adolescents and adults with birch pollen-induced allergic rhinitis or rhinoconjunctivitis.[2]
In the skin disease study, participants have RDEB or JEB, and the open-label part also includes RDEB patients younger than 1 year.[1] The trial data do not provide more detailed inclusion or exclusion rules, so only these groups can be confirmed from the source material.[1]
Main outcomes being measured
The allergy study measures the mean daily CSMS over the peak birch pollen season in 2025, comparing the placebo group with the active treatment group.[2] This score combines symptoms and the need for medicine, so it gives a practical picture of how well the treatment helps everyday allergy control.[2]
The skin disease study measures the proportion of subjects with RDEB aged 1 year or older who have complete target wound closure at Month 6, with confirmation 2 weeks later.[1] In simple terms, researchers want to know how many patients have full healing of the wound they are following.[1]
The brief summary for the skin disease trial also states that the study is looking at safety and efficacy, meaning whether the treatment can be used without major problems and whether it helps the condition.[1] The allergy study likewise aims to understand the clinical effect of the treatment during the pollen season.[2]
Trial status and size
The epidermolysis bullosa trial is authorised and has an enrollment of 167 participants.[1] The birch pollen allergy trial is completed and has an enrollment of 360 participants.[2]
These two studies show that Rupatadine appears in very different research settings, from rare skin disease to seasonal allergy research.[1][2] The trial records focus on group comparisons, symptom scores, and wound healing rather than on a drug monograph or detailed pharmacology.[1][2]


