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2025-521736-10-00RecruitingPhase 3

Grass Immunotherapy for Rhinitis and Asthma (GIRA)

Clinical trial to evaluate the efficacy and safety of Depigoid Grass-Mix at 1000 DPP/mL and Depigoid FORTE Grass-Mix at 3000 DPP/mL compared with placebo in patients suffering from allergic rhinoconjunctivitis with or without controlled asthma due to clinically relevant sensitisation to grass pollen.

Source: EU CTIS (euclinicaltrials.eu) · Last updated 3 Jul 2026

Next steps

Brief summary (registry, in English)

Double-Blind, Randomised,Controlled Phase Primary Efficacy: Assessment of the clinical efficacy of grasses allergen immunotherapy for each concentration, evaluated by the combined symptom and medication score (0-6 collected through a mobile App) during the peak grass pollen compared with placebo after at least 8 injections of treatment. Open-label Phase Primary Efficacy: Assessment of the clinical efficacy of grasses allergen immunotherapy, evaluated by the change in the amount of allergen necessary to obtain a positive CPT (after the pollen season) compared to baseline.

Status (registry)
Recruiting
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
324 (estimated)
First submitted
18 Nov 2025
Start date
23 Jun 2026
Lead sponsor
LETI Pharma S.L.U.
Diseases
Asthma
EU CT number
2025-521736-10-00

What you commit to

  • Study type: Interventional · Phase 3
  • Planned participants: 324
  • 47 sites in 2 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of EU CTIS (euclinicaltrials.eu). It describes the study design.

AI-kivonat: who the study is looking for

Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for people aged 5 or older with moderate or severe allergic rhinoconjunctivitis due to grass pollen, with or without controlled asthma.

Age
5 years or older
Sex
All sexes can join.
Disease stage
Moderate or severe allergic rhinoconjunctivitis (ARIA); if asthma is present, it must be controlled according to GINA guidelines.
Earlier treatment
People who had any type of allergen immunotherapy (AIT) in the previous 5 years cannot join. People who needed systemic corticosteroids in the 12 weeks before screening cannot join.
Biomarker or test result
Clinically relevant sensitisation to grass pollen.

Main reasons for not taking part

  • Allergen immunotherapy (AIT) in the previous 5 years
  • Uncontrolled or unstable asthma
  • Treatment with biologics or immunosuppressive treatment (except topical)
  • Sensitisation to Alternaria alternata
  • Pregnancy test not negative on the first day of treatment, or breastfeeding

Read by machine on 9 Nov 2026.

Who cannot take part

Copied verbatim from EU CTIS (euclinicaltrials.eu) and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Previous treatment with any type of AIT in the previous 5 years
  • Any contraindication for treatment with SC allergen specific immunotherapy according to information of product use.
  • Participants who have required systemic corticosteroids in the 12 weeks prior to the inclusion (screening) in the trial.
  • Participants who have previously suffered a serious secondary reaction during the skin prick test (systemic reactions after SPT, which can be classified using World Allergy Organisation 2010 (WAO-2010) reactions and serious according to regulatory definition of serious adverse reaction).
  • Participants receiving treatment with biologics
  • Uncontrolled asthma at the time of immunotherapy administration, according to the GINA guidelines or unstable asthma
  • Female participants of non-childbearing potential may be enrolled in the study. Nonchildbearing potential is defined as pre-menarche, current bilateral tubal ligation or occlusion, hysterectomy, bilateral ovariectomy. Female participants of childbearing potential may be enrolled in the study, if the participant: o has practiced adequate contraception for 1 month prior to study intervention administration, and o has a negative pregnancy test on the first day of study intervention administration, and o has agreed to continue adequate contraception during the entire study treatment period (see Section 10.4).

Other illness

  • Participants clinically unstable at the time of the inclusion (screening) in the trial (acute asthmatic exacerbation, respiratory infection, febrile fever, acute urticaria, etc); rescreening is permitted (see Section 5.4).
  • Any other clinical condition that, in the opinion of the Investigator, might pose additional risk to the participant due to participation in the study.
  • Participants with Investigator-determined chronic urticaria, severe dermographism, severe atopic dermatitis, sunburn, active psoriasis with lesions in areas where skin tests will be performed, or a history of hereditary angioedema.
  • Participants with any condition that represents an absolute contraindication to the administration of adrenaline (heart disease, etc).
  • Participants with any other disease not associated with the moderate or severe rhinoconjunctivitis or asthma, but of potential severity and that could interfere with the treatment and follow-up (epilepsy, psychomotor deterioration, malformations, multi-operated, kidney diseases, etc).
  • Participants whose status prevents them from providing cooperation and/or who presents with severe psychiatric disorders.
  • Participants with known allergy to other vaccine components different from grass allergen extract.
  • Participants with chronic lower airway diseases other than asthma such as emphysema or bronchiectasis.

Lab values

  • Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).

Other

  • Participants undergoing immunosuppressive treatment (except topical immunosuppressants).
  • Sensitisation to Alternaria alternata
  • Direct relatives of the Investigator.
  • Sensitisation to mites if clinically relevant
  • Sensitisation to epithelia if the participant lives or has frequent contact with animals.
  • Sensitisation to other co-seasonal allergens
  • Lactating.

Who the study is looking for

  • Participants aged ≥5 years of age at the time of signing consent or assent.
  • Participants suffering from moderate or severe allergic rhinoconjunctivitis (ARIA)
  • Asthmatic participants must be, in the Investigator’s judgement, with controlled disease according to Global Initiative on Asthma (GINA) guidelines
  • Participants/legal representatives who have understood and signed the informed consent or informed assent (see Section 10.1.4).
  • Participants or guardians need to have a mobile phone which can support the cSMS App and access to internet and/or mobile service.
  • Participants who are able to remain at their usual place of residence for the majority of the pollen season.
  • Participants are capable of complying with the study protocol.
  • Preexisting stable disease is allowed unless otherwise specified in the exclusion criteria in Section 5.2, as established by medical history and physical examination and as determined by the Investigator. Preexisting stable disease is defined as not requiring significant change in therapy or hospitalization for worsening disease during the 28 days before enrolment.
  • Agree to actively stay in contact with the trial site for the duration of the trial for the participant’s own safety

Sex: All · Does not accept healthy volunteers

Full criteria on EU CTIS (euclinicaltrials.eu)

Sites (47)

Sites in registry order. Save your city in your profile to sort them by distance.

SiteCityCountrySite status
Hospital General Universitario de AlbaceteAlbaceteSpainRecruiting
Hospital Quiron Santa CristinaAlbaceteSpainRecruiting
Hospital Universitario Fundación AlcorcónAlcorcónSpainRecruiting
Hospital Universitario TajoAranjuezSpainRecruiting
Hospital Nuestra Senora de SonsolesÁvilaSpainRecruiting
Clínica Dermatología y Alergia (Badajoz)BadajozSpainRecruiting
Hospital Universitario de BadajozBadajozSpainRecruiting
Hospital de la Santa Creu i Sant PauBarcelonaSpainRecruiting
Pectus Respiratory Health S.L.BarcelonaSpainRecruiting
Hospital General Universitario De CastellonCastello De La PlanaSpainRecruiting
Hospital Virgen de la LuzCuencaSpainRecruiting
Hospital General Universitario de ElcheElcheSpainRecruiting
Hospital Universitario de FuenlabradaFuenlabradaSpainRecruiting
Pectus Respiratory Health S.L.GironaSpainRecruiting
Hospital Universitario De Guadalajara SESCAMGuadalajaraSpainRecruiting
Hospital Universitario Severo OchoaLeganésSpainRecruiting
Hospital Universitari de Santa MariaLleidaSpainRecruiting
Hospital de LlíriaLlíriaSpainRecruiting
Hospital Universitario Ramón y CajalMadridSpainRecruiting
Hospital Universitario Infanta ElenaMadridSpainRecruiting
Hospital Universitario 12 de OctubreMadridSpainRecruiting
Hospital Universitario de la PrincesaMadridSpainRecruiting
Hospital Universitario Infanta LeonorMadridSpainRecruiting
Hospital Central De La Cruz Roja San Jose Y Santa AdelaMadridSpainRecruiting
Hospital Universitario Puerta de Hierro de MajadahondaMajadahondaSpainRecruiting
Hospital Universitario Regional de MálagaMálagaSpainRecruiting
Althaia Xarxa Assistencial Universitaria De Manresa Fundacio PrivadaManresaSpainRecruiting
Complejo Hospitalario Universitario de OurenseOurenseSpainRecruiting
Clínica Universidad de navarraPamplonaSpainRecruiting
Hospital Virgen del PuertoPlasenciaSpainRecruiting
Complexo Hospitalario Universitario de PontevedraPontevedraSpainRecruiting
Hospital Universitario De SalamancaSalamancaSpainRecruiting
Hospital Quironsalud Infanta LuisaSevillaSpainRecruiting
Hospital Universitario Virgen De La MacarenaSevillaSpainRecruiting
Hospital Nuestra Senona Del PradoTalavera De La ReinaSpainRecruiting
Consorci Sanitari de TerrassaTerrassaSpainRecruiting
Consorcio Hospital General Universitario de ValenciaValenciaSpainRecruiting
Hospital De Valladolid Felipe IIValladolidSpainRecruiting
Consorci Hospitalari de VicVicSpainRecruiting
Hospital Clinico Universitario Lozano BlesaZaragozaSpainRecruiting
ULS De Castelo Branco E.P.E.Castelo BrancoPortugalRecruiting
Hospital Particular do Algarve S.A.FaroPortugalRecruiting
Unidade Local De Saude Do Alto Ave E.P.E.GuimaraesPortugalRecruiting
Unidade Local De Saude De Santa Maria E.P.E.LisbonPortugalRecruiting
Unidade Local De Saude De Sao Jose E.P.E.LisbonPortugalRecruiting
Hospital Cuf Tejo S.A.LisbonPortugalRecruiting
Unidade Local de Saude de Sao Joao E.P.E.PortoPortugalRecruiting

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This page is information, not medical advice. Discuss any trial with your doctor.