Clinical Trial


An Intermountain study to determine if blood thinners can help prevent blood clots.

About This Study 

An Intermountain study team led by Drs. Joseph Bledsoe, Sarah Majercik, and Scott Woller is part of a national effort to determine if blood thinners can help prevent blood clots that can cause stroke, heart attacks, blood clots in the lungs (PE), blood clots in the legs (DVT), or even admission to the hospital in people with COVID-19 who are not initially admitted to the hospital.

Join ACTIV-4: COVID-19 Outpatient Thrombosis Prevention Trial

You May Be Eligible If

  • You are having symptoms and have had a positive COVID-19 test within 14 days.
  • You are between the ages of 40 to 80.
  • You are not currently pregnant and can take blood thinners.

What to Expect

ACTIV-4 logo
  • The study team will contact you to share more details about the study and determine if you would like to be screened and participate.
  • The study team will take a blood sample to see if you meet the study criteria.
  • If you meet the study criteria, you will be randomly selected to receive one of four medications to be taken for 45 days.
  • Medication will be sent to your home and weekly follow-ups will take place by phone or email.

If you are interested, please email the study team at