For Healthcare Professionals

Efficacy and Safety Study of Efgartigimod in Adults With Post-COVID-19 POTS

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About the study

The study aims to investigate the safety, tolerability, efficacy, pharmacodynamics (PD), pharmacokinetics (PK), and immunogenicity of efgartigimod compared to placebo in participants with post-COVID-19 postural orthostatic tachycardia syndrome (POTS) (post-COVID-19 POTS).
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Who can take part

You may be eligible to participate in the study if you meet the following criteria:

INCLUSION CRITERIA

Inclusion Criteria:

  1. Reached the age of consent when signing the informed consent form
  2. Capable of providing signed informed consent and complying with protocol requirements

Diagnosed with new-onset POTS post-COVID-19 established by the following:

  1. History of COVID-19 based on a previous positive test result from either laboratory-confirmed COVID-19 test (eg, a PCR test) or non-laboratory-confirmed COVID-19 test (eg, rapid antigen test); this positive result may be either documented or patient-reported
  2. Tilt table or orthostatic vital sign measurements during screening consistent with consensus criteria: sustained HR increase of ≥30 bpm within 10 min of standing or head up tilt (≥40 bpm for individuals aged 18 to 19 years) and/or HR reaching >120 bpm within 10 min; absence of sustained 20 mmHg decrease in systolic blood pressure (SBP)
  3. Ongoing symptoms of POTS confirmed by the investigator with at least 3 symptoms in each of the following areas lasting longer than 12 weeks after either diagnosis of COVID-19 or after hospital discharge for COVID-19:

i. Vasomotor symptoms: fatigue, orthostatic intolerance, brain fog, exertional dyspnea, difficulty with concentration, venous pooling, and exercise intolerance ii. Sympathetic over-compensation symptoms: palpitation, heat intolerance, nausea with or without vomiting, insomnia, anxiety, lack of appetite, chest pain, and diaphoresis

COMPASS 31 ≥35 at screening

Agree to use contraceptives consistent with local regulations regarding the methods of contraception for those participating in clinical studies and the following:

Male participants Female participants of childbearing potential must have a negative serum pregnancy test at screening and a negative urine pregnancy test at baseline before receiving IMP. Contraceptive requirements.

Body mass index (BMI) <35 kg/m2

EXCLUSION CRITERIA

Exclusion Criteria:

  1. Diagnosis of or receiving treatment for the following conditions before COVID-19: peripheral neuropathy, POTS, myalgic encephalomyelitis encephalitis/chronic fatigue syndrome, Ehlers Danlos syndrome confirmed by genetic testing, autonomic neuropathy, multiple sclerosis, stroke, spinal cord injury, or any known lesions in the central nervous system by imaging or neurological exam
  2. History of or currently being treated for clinically significant ongoing cardiac arrythmia, heart failure, myocarditis, pulmonary embolism requiring anticoagulation, pulmonary fibrosis, or critical illness-related polyneuropathy or myopathy
  3. Known autoimmune disease that, in the investigator's judgment, would interfere with an accurate assessment of clinical symptoms of post-COVID-19 POTS or puts the participant at undue risk
  4. Known HIV disease or common variable immunodeficiency

History of malignancy unless considered cured by adequate treatment with no evidence of recurrence for ≥3 years before the first administration of IMP. Adequately-treated participants with the following cancers may be included at any time:

  1. Basal cell or squamous cell skin cancer
  2. Carcinoma in situ of the cervix
  3. Carcinoma in situ of the breast
  4. Incidental histological finding of prostate cancer (TNM stage T1a or T1b)
  5. Clinically significant uncontrolled active or chronic bacterial, viral, or fungal infection or positive SARS-CoV-2 PCR test at screening

Positive serum test at screening for an active infection with any of the following:

  1. Hepatitis B virus (HBV) that is indicative of an acute or chronic infection, unless associated with a negative HB surface antigen (HBsAg) or negative HBV DNA test
  2. Hepatitis C virus (HCV) based on HCV antibody assay unless a negative RNA test is available
  3. HIV
  4. A medical condition that could confound the results of the study or put the participant at undue risk in the investigator's judgment
  5. Clinically significant disease, recent major surgery (within 3 months of screening), or intends to have surgery during the study; or any other condition that in the opinion of the investigator could confound the results of the study or put the participant at undue risk
  6. Total IgG <4 g/L at screening
  7. Received within 12 weeks or 5 half-lives (whichever is longer) before screening an investigational product
  8. Received within 12 weeks before screening either intravenous immunoglobulin (Ig) IV or SC or plasmapheresis/plasma exchange (PLEX)
  9. Received a live or live-attenuated vaccine less than 4 weeks before screening
  10. Known hypersensitivity to IMP or 1 of its excipients
  11. Previously participated in an efgartigimod clinical study and received at least 1 dose of IMP
  12. Currently participating in another interventional clinical study
  13. History (within 12 months of screening) of or current alcohol, drug, or medication abuse
  14. Pregnant or lactating or intends to become pregnant during the study
  15. Unwilling to remain on a stable regimen of medications during the study
  16. Unwilling to avoid initiation of new physical rehabilitation or other physician-prescribed exercise programs during the 24-week treatment period
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Study Locations

Enter your ZIP code/Postal code/PIN code to locate study sites near you:

How to Apply


Contact the study center to learn if this study is a good match for you.

Study’s details


Contition

Postural Orthostatic Tachycardia Syndrome

Age (in years)

18+

Phase

Phase 2

Participants needed

42

Est. Completion Date

Nov 30, 2024

Treatment type

Interventional


Sponsor

argenx

ClinicalTrials.gov identifier

NCT05633407

Study number

ARGX 113-2104

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