Ublituximab in MS: how injection site and delivery method affect absorption
Official title: A Phase 2, Multicenter, Study to Evaluate the Pharmacokinetics and Safety of Subcutaneous Ublituximab Administered at Various Injection Sites and Relative Bioavailability Via Autoinjector Device Versus Syringe in Patients With Multiple Sclerosis
Run by TG Therapeutics, Inc. · NCT07503873 · Data updated 2026-11-12
This study tests how different SC injection sites and a prefilled pen delivery compare in how ublituximab behaves in the body for people with relapsing MS.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 350 (estimated) |
| Sponsor | TG Therapeutics, Inc. Industry-sponsored |
| Drugs / interventions | ublituximab |
| Locations | 44 sites (Bihać and 43 other locations) |
| Status | Recruiting |
| Started | April 1, 2026 |
| Main results expected | July 31, 2027 |
| Study ends | May 30, 2029 |
| Registry record updated | October 29, 2026 |
| Trial ID | NCT07503873 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults with relapsing MS (per 2017 McDonald criteria), EDSS ≤5.5, neurologically stable for 30+ days, and eligible for SC ublituximab.
✕Probably not a fit
Patients with primary-progressive MS, active immune diseases other than MS, or recent use of MS therapies or investigational agents may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 2 interventional trial investigates the pharmacokinetics and safety of subcutaneous ublituximab given at various injection sites and compares a prefilled pen versus syringe delivery in adults with relapsing MS. Participants must have relapsing MS, EDSS ≤5.5, and be neurologically stable for at least 30 days. The study uses two delivery methods and aims to determine relative bioavailability and safety signals across administration routes. Exclusion criteria restrict PPMS, active other immune diseases, significant blood cell abnormalities, and recent MS therapies or investigational drugs. Lead sponsor is TG Therapeutics, with trial sites in Bihać, Mostar, and Sarajevo.
Why it matters
Potential benefit: If successful, the study could inform optimal injection site and device choice to improve drug exposure and safety for MS patients.
How similar studies have gone: Previous work with subcutaneous monoclonal antibodies in MS supports PK and safety assessment of administration methods, but this exact comparison is relatively novel for ublituximab.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. Diagnosis of relapsing multiple sclerosis (RMS) (2017 Revised McDonald criteria). 2. Expanded Disability Status Scale (EDSS) score less than or equal to (≤) 5.5 at screening. 3. Neurologically stable for more than (\>) 30 days prior to screening and Day 1. 4. Female participants of childbearing potential must consent to use an effective method of contraception from consent and for 6 months after the last dose of ublituximab. Exclusion Criteria: 1. Primary-progressive multiple sclerosis (PPMS) or inactive secondary progressive multiple sclerosis (SPMS). 2. Active chronic disease of the immune system other than MS or immunodeficiency syndrome. 3. Participants with significantly impaired bone marrow function or significant leukopenia or thrombocytopenia. 4. Participants who received any approved therapy to treat MS within 5 half-lives of the medication prior to screening. 5. Treatment with any investigational agent within 5 half-lives of the investigational drug prior to screening. 6. Females who are pregnant or nursing. Note: Other protocol-specified Inclusion/Exclusion criteria may apply.
Where it's running
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TG Therapeutics Investigational Trial Site
Bihać, Bosnia and Herzegovina Recruiting -
TG Therapeutics Investigational Trial Site
Mostar, Bosnia and Herzegovina Recruiting -
TG Therapeutics Investigational Trial Site
Sarajevo, Bosnia and Herzegovina Recruiting -
TG Therapeutics Investigational Trial Site
Tuzla, Bosnia and Herzegovina Recruiting -
TG Therapeutics Investigational Trial Site
Zenica, Bosnia and Herzegovina Recruiting -
TG Therapeutics Investigational Trial Site
Rustavi, Georgia Recruiting
Show 38 more locations
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TG Therapeutics Investigational Trial Site
Tbilisi, Georgia Recruiting -
TG Therapeutics Investigational Trial Site
Tbilisi, Georgia Recruiting -
TG Therapeutics Investigational Trial Site
Tbilisi, Georgia Recruiting -
TG Therapeutics Investigational Trial Site
Tbilisi, Georgia Recruiting -
TG Therapeutics Investigational Trial Site
Tbilisi, Georgia Recruiting -
TG Therapeutics Investigational Trial Site
Shtip, North Macedonia Recruiting -
TG Therapeutics Investigational Trial Site
Skopje, North Macedonia Recruiting -
TG Therapeutics Investigational Trial Site
Bydgoszcz, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Katowice, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Katowice, Poland Recruiting -
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Kielce, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Krakow, Poland Recruiting -
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Lodz, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Olsztyn, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Poznan, Poland Recruiting -
TG Therapeutics Investigational Trial Site
Warsaw, Poland Recruiting -
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Zabrze, Poland Recruiting -
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Belgrade, Serbia Recruiting -
TG Therapeutics Investigational Trial Site
Kragujevac, Serbia Recruiting -
TG Therapeutics Investigational Trial Site
Chernihiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Chernihiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Ivano-Frankivsk, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Ivano-Frankivsk, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Ivano-Frankivsk, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Kyiv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Lviv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Lviv, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Odesa, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Poltava, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Ternopil, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Uzhhorod, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Vinnytsia, Ukraine Recruiting -
TG Therapeutics Investigational Trial Site
Vinnytsia, Ukraine Recruiting
Study contacts
- Study coordinator: TG Therapeutics Clinical Support Team
- Email: clinicalsupport@tgtxinc.com
- Phone: 1-877-575-8489
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Switching to ublituximab for ocrelizumab wearing-off in multiple sclerosis
This pilot will try switching people with relapsing MS who experience symptom 'wearing off' on ocrelizumab to ublituximab to see if their symptoms improve or return later.
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Ublituximab (Briumvi) for early relapsing MS
This study will test whether giving Ublituximab (Briumvi) about twice a year is safe and changes a blood marker (neurofilament light) in adults with early relapsing MS.
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Evaluating real-world experiences of patients treated with BRIUMVI® for relapsing multiple sclerosis
This study is looking to see how well BRIUMVI® works and what side effects it has for people with relapsing multiple sclerosis in everyday settings.
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Treadmill-based virtual reality walking training for MS patients
This study tests whether a treadmill with virtual reality and smart socks can help people with multiple sclerosis walk better and feel safer in daily life.
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Virtual Reality and Mental Practice to Improve Balance and Walking in Relapsing MS
This study tests whether virtual reality training or mental practice can improve balance and walking in people with relapsing–remitting multiple sclerosis.
-
REAL-MS: A Look at Autologous Stem Cell Transplant vs High-Efficacy MS Therapies in Real-World Care
This study tests how AHSCT compares to high-efficacy MS medicines in adults treated in routine clinical care.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.