A Long-term Study to Assess the Safety and Efficacy of Efgartigimod in Adult Patients With Primary Immune Thrombocytopenia (ITP).

  • STATUS
    Recruiting
  • End date
    Nov 22, 2025
  • participants needed
    156
  • sponsor
    argenx
Updated on 22 January 2022

Summary

This is an open-label long-term multicenter phase 3 trial to evaluate the efficacy and safety of ARGX-113 in adult patients with primary ITP.

Details
Condition Primary Immune Thrombocytopenia
Treatment efgartigimod
Clinical Study IdentifierNCT04225156
Sponsorargenx
Last Modified on22 January 2022

Eligibility

Yes No Not Sure

Inclusion Criteria

Ability to understand the requirements of the trial, to provide written informed consent (including consent for the use and disclosure of research-related health information), and to comply with the trial protocol procedures (including required trial visits)
Patients enrolled in the ARGX-113-1801 trial who completed the 24-weeks trial period
Women of childbearing potential must have a negative urine pregnancy test at baseline before trial medication (infusion) can be administered. Women are considered of childbearing potential unless they are postmenopausal (defined by continuous amenorrhea) for at least 1 year with a follicle-stimulating hormone (FSH) of >40 IU/L or are surgically sterilized (ie, women who had a hysterectomy, a bilateral salpingectomy, both ovaries surgically removed, or have a documented permanent female sterilization procedure including tubal ligation). Follicle-stimulating hormone can be used to confirm postmenopausal status in amenorrheic patients not on hormonal replacement therapy
Women of childbearing potential should use a highly effective or acceptable method of contraception during the trial and for 90 days after the last administration of the IMP. They must be on a stable regimen, for at least 1 month
combined (estrogen and progestogen containing) hormonal contraception associated with inhibition of ovulation
oral
intravaginal
transdermal
intrauterine device (IUD)
intrauterine hormone-releasing system
progestogen-only hormonal contraception associated with inhibition of ovulation
bilateral tubal occlusion
oral
injectable
continuous abstinence from heterosexual sexual contact. Sexual abstinence is only allowable if it is the preferred and usual lifestyle of the patient. Periodic abstinence (calendar, symptothermal, post-ovulation methods) is not acceptable
implantable
vasectomized partner (provided that the partner is the sole sexual partner of the trial participant and that aspermia was documented post-procedure)
male or female condom with or without spermicide
cap, diaphragm, or sponge with spermicide
Non-sterilized male patients who are sexually active with a female partner of
Ability to understand the requirements of the additional 52-week treatment period of the trial, to provide written informed consent (including consent for the use and disclosure of research-related health information), and to comply with the trial protocol procedures (including required trial visits)
childbearing potential must use an acceptable method of contraception, ie, a
Patient has completed a 52-week treatment period
condom. Male patients practicing true sexual abstinence (when this is in line
with the preferred and usual lifestyle of the participant) can be included
Sterilized male patients who have had a vasectomy with documented aspermia
post-procedure can be included. In addition, male patients are not allowed to
donate sperm during this period from signing of informed consent form
throughout the duration of the trial, and for 90 days after the last
administration of IMP. In addition to the above criteria, for patients who
want to continue receiving efgartigimod during an additional 52-week treatment
period (only applicable in case efgartigimod is not yet commercially available
for patients with primary ITP, or becomes available through another patient
program for patients with primary ITP)

Exclusion Criteria

Pregnant or lactating women, and those intending to become pregnant during the trial or within 90 days after the last dosing
Patients with known medical history of hypersensitivity to any of the ingredients of efgartigimod
Use of any other investigational drug or participation in any other investigational trial
Introduction or continuation of non-permitted medications during the ARGX-113-1801 trial (such as anti-CD20 therapy, romiplostim, monoclonal antibodies, Fc fusion proteins or live/live-attenuated vaccines)
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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