A Study to Test Whether BI 1815368 Helps People With an Eye Condition Called Diabetic Macular Edema
A Randomised, Double-masked, Placebo-controlled Trial to Evaluate the Efficacy, Safety, and Tolerability of Oral BI 1815368 in Participants With Centre-involved Diabetic Macular Edema for 48 Weeks of Treatment (THULITE)
Boehringer Ingelheim
300 participants
Jun 5, 2025
INTERVENTIONAL
Conditions
Summary
This study is open to adults 18 and older with an eye condition called diabetic macular edema. People are required to have a specific type of diabetic macular edema called centre-involved diabetic macular edema (CI-DME) to take part. The purpose of this study is to find out whether a medicine called BI 1815368 improves sight in people with CI-DME and to find the most suitable dose. This study has 2 parts. In the first part, participants are put into 2 groups of equal size randomly, which means by chance. One group takes BI 1815368 tablets and the other group takes placebo tablets. Placebo tablets look like BI 1815368 tablets but do not contain any medicine. In the second part, participants are put into 4 groups of equal size randomly. 3 groups take different daily doses of the study medicine, BI 1815368, while 1 group takes placebo. All participants take tablets twice a day for about 11 months. Participants are in the study for about 1 year. During this time, they visit the study site 16 times. At visits, doctors check the participant's vision and collect information on any health problems. They take detailed pictures of the eye. The changes over time are compared between the groups to see if the treatment works.
Eligibility
Inclusion Criteria3
- ≥18 years of age
- Diagnosis of diabetes mellitus (DM) (type 1 or type 2), Haemoglobin A1C (HbA1c) \<12% treated with stable medication for at least 30 days prior to Day 1; no already-set plans for major changes in DM medication (e.g. start of new medication) at the time of screening and baseline
- Centre-involved diabetic macular edema (CI-DME) confirmed on spectral domain optical coherence tomography (SD-OCT) with central subfield foveal thickness (CST) ≥320 µm in the study eye at screening
Exclusion Criteria5
- Macular edema considered to be due to other causes than CI-DME in the study eye
- Proliferative diabetic retinopathy or iris neovascularisation (including the anterior chamber angle) in the study eye
- Any intravitreal (IVT) anti-vascular endothelial growth factor (VEGF) treatment within 4 months before Day 1 (other than faricimab or aflibercept 8mg), and within 6 months before Day 1 for faricimab or aflibercept 8 mg, and/or more than 4 prior IVT injections with anti-VEGF treatment in total in the study eye
- Any history of panretinal photocoagulation, macular laser photocoagulation, vitreoretinal surgery, IVT or periocular corticosteroid treatment (within 12 months before Day 1), history of fluocinolone ophthalmic implant or dexamethasone IVT implant before Day 1, or topical steroid or NSAID treatment (within 30 days before Day 1)
- Active ocular inflammation of any history of intraocular inflammation within 1 year
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Interventions
BI 1815368
Placebo matching BI 1815368
Locations(80)
View Full Details on ClinicalTrials.gov
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NCT06962839