Assess Gastrointestinal Blood Loss After Receiving Aspirin or Aspirin Plus Rivaroxaban in Healthy Adult Participants
Study Details
Study Description
Brief Summary
The primary objective of the study is to determine whether aspirin alone or aspirin combined with various doses of rivaroxaban causes subclinical GI blood loss as determined by the HemoQuant assay.
The secondary objective of the study is to evaluate the safety and tolerability of aspirin alone or in combination with rivaroxaban to healthy volunteers.
Condition or Disease | Intervention/Treatment | Phase |
---|---|---|
|
N/A |
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
---|---|
Experimental: Arm 1: Aspirin QD Randomized 1:1:1 |
Drug: Aspirin
Administered orally once per day (QD)
|
Experimental: Arm 2: Aspirin QD + rivaroxaban BID Randomized 1:1:1 |
Drug: Aspirin
Administered orally once per day (QD)
Drug: rivaroxaban low dose
Administered orally twice per day (BID)
|
Experimental: Arm 3: Aspirin QD + rivaroxaban QD Randomized 1:1:1 |
Drug: Aspirin
Administered orally once per day (QD)
Drug: rivaroxaban high dose
Administered orally QD
|
Outcome Measures
Primary Outcome Measures
- Change in fecal hemoglobin content as measured by HemoQuant during the second week of exposure to challenge medications [Up to Week 4]
HemoQuant is a chemical laboratory test of fecal hemoglobin content.
Secondary Outcome Measures
- Number of bleeding events during the baseline period as compared to the challenge period [Up to week 4]
Eligibility Criteria
Criteria
Key Inclusion Criteria:
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Has a body mass index between 18 and 32 kilograms per metered square (kg/m2), inclusive
-
Is judged by the investigator to be in good health based on medical history, physical examination, vital sign measurements, and electrocardiograms (ECGs) performed during screening
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Is in good health based on laboratory safety testing obtained at the screening visit
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Willing and able to abstain from alcohol use for the duration of the study
Key Exclusion Criteria:
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History of anemia, abnormal bleeding (including vaginal bleeding or excessive menstrual periods), previous diagnosis of bleeding diathesis, or blood clots as defined in the protocol
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History, in the last year, of any bleeding GI lesions such as peptic ulcer, hemorrhoids or anal fissure, or a positive fecal occult blood test performed either during screening or on Day 1 prior to randomization
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Presence of irregular stool patterns, constipation, or frequent diarrhea that, in the opinion of the investigator, may interfere with stool collections required by the protocol
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Inability to refrain during study period from activities with high risk of bleeding or trauma such as planned surgery, contact sports, etc.
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Hemoglobin levels below the lower limit of normal as defined by local laboratory at screening; the lab may be repeated once if initially abnormal
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PT and aPTT values above the upper limit of normal as defined by the local laboratory during screening; the lab may be repeated once if initially abnormal
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Platelet count below the lower limit of normal as defined by the local laboratory during screening; the lab may be repeated once if initially abnormal
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History of clinically significant respiratory, hepatic, renal, GI, endocrine, hematological, psychiatric or neurological disease, as assessed by the investigator that may confound the results of the study or poses an additional risk to the participant by study participation.
History of any atherosclerotic cardiovascular disease
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Presents any concern to the study investigator that might confound the results of the study or poses an additional risk to the participant by their participation in the study
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Has received a COVID-19 vaccination within 1 week of planned start of challenge drug regimen or for which the planned COVID-19 vaccinations would not be completed 1 week prior to start of challenge agent
NOTE: Other protocol defined inclusion / exclusion criteria apply.
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
---|---|---|---|---|---|
1 | LabCorp CRU | Leeds | West Yorkshire | United Kingdom | LS2 9LH |
Sponsors and Collaborators
- Regeneron Pharmaceuticals
Investigators
- Study Director: Clinical Trial Management, Regeneron Pharmaceuticals
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- R0000-HV-2229
- 2022-002761-15