Clinical trial Recruiting at 44 sites Phase 2 Interventional Ages 18 to 65

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

PhasePhase 2
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment350 (estimated)
SponsorTG Therapeutics, Inc.
Industry-sponsored
Drugs / interventionsublituximab
Locations44 sites (Bihać and 43 other locations)
StatusRecruiting
StartedApril 1, 2026
Main results expectedJuly 31, 2027
Study endsMay 30, 2029
Registry record updatedOctober 29, 2026
Trial IDNCT07503873 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

  • 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
  • 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
  • TG Therapeutics Investigational Trial Site
    Kielce, Poland
    Recruiting
  • TG Therapeutics Investigational Trial Site
    Krakow, Poland
    Recruiting
  • TG Therapeutics Investigational Trial Site
    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
  • TG Therapeutics Investigational Trial Site
    Zabrze, Poland
    Recruiting
  • TG Therapeutics Investigational Trial Site
    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

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.