Blood Thinner Ineffective for COVID-19 Patients: Study

A clinical trial finds that the anticoagulant apixaban, which has been prescribed to help COVID-19 patients recover, is ineffective and in rare instances dangerous.

black and white image of young man in sunglasses with trees in background
| 2 min read
Image of a white cardboard box with a blue vertical stripe on the left side, the word “Apixaban” in blue lettering at the bottom, and a depiction of apixaban’s molecular structure in black.
Register for free to listen to this article
Listen with Speechify
0:00
2:00
Share

New data from a clinical trial suggest that apixaban, an anticoagulant that’s widely been prescribed to promote recovery in patients with severe cases of COVID-19, doesn’t offer any discernable benefit for people with the disease.

The UK-wide trial, which is run by Addenbrooke’s Hospital and the University of Cambridge, involved more than 1,000 hospitalized COVID-19 patients and compared the outcomes of those who had been randomly assigned to receive apixaban to those who had not, according to Financial Times. It found that 29.1 percent of those who received the blood thinner either ended up back in the hospital or died within a year, compared to 30.8 percent of people who weren’t given the drug. That finding doesn’t support apixaban as an effective treatment for COVID-19, and the researchers conclude that doctors ought to stop prescribing it to their coronavirus patients. Meanwhile, BBC News reports that a “small number” of the 402 patients who took apixaban had to discontinue treatment due to severe bleeding.

“Up until now it’s been assumed that Apixaban helps patients recover after severe Covid-19 and that thinning their blood to prevent clots is beneficial,” joint chief investigator Mark Toshner, director of translational biomedical research at Cambridge, tells FT. He adds that he and his colleagues hope “these results will stop this drug being needlessly prescribed to patients with Covid-19 and we can change medical practice.”

See “SARS-CoV-2’s Wide-Ranging Effects on the Body

Charlotte Summers, the other joint chief investigator on the trial and an intensive care specialist at Addenbrooke, tells BBC News: “This finding is important because it will prevent unnecessary harm occurring to people for no benefit.” She adds that it “also means we must continue our search for therapies that improve longer-term recovery for this devastating disease.”

The trial will continue with other drugs thought to help against COVID-19, according to BBC News, including a statin called atorvastatin that may help lessen the inflammatory response launched by COVID-19 patients’ immune systems and so prevent tissue damage.

See “Doctors and Researchers Probe How COVID-19 Attacks the Heart

Keywords

Meet the Author

  • black and white image of young man in sunglasses with trees in background

    Dan Robitzski

    Dan is a News Editor at The Scientist. He writes and edits for the news desk and oversees the “The Literature” and “Modus Operandi” sections of the monthly TS Digest and quarterly print magazine. He has a background in neuroscience and earned his master's in science journalism at New York University.
Share
You might also be interested in...
Loading Next Article...
You might also be interested in...
Loading Next Article...
May digest 2025 cover
May 2025, Issue 1

Study Confirms Safety of Genetically Modified T Cells

A long-term study of nearly 800 patients demonstrated a strong safety profile for T cells engineered with viral vectors.

View this Issue
iStock

TaqMan Probe & Assays: Unveil What's Possible Together

Thermo Fisher Logo
Meet Aunty and Tackle Protein Stability Questions in Research and Development

Meet Aunty and Tackle Protein Stability Questions in Research and Development

Unchained Labs
Detecting Residual Cell Line-Derived DNA with Droplet Digital PCR

Detecting Residual Cell Line-Derived DNA with Droplet Digital PCR

Bio-Rad
How technology makes PCR instruments easier to use.

Making Real-Time PCR More Straightforward

Thermo Fisher Logo

Products

The Scientist Placeholder Image

Biotium Launches New Phalloidin Conjugates with Extended F-actin Staining Stability for Greater Imaging Flexibility

Leica Microsystems Logo

Latest AI software simplifies image analysis and speeds up insights for scientists

BioSkryb Genomics Logo

BioSkryb Genomics and Tecan introduce a single-cell multiomics workflow for sequencing-ready libraries in under ten hours

iStock

Agilent BioTek Cytation C10 Confocal Imaging Reader

agilent technologies logo