Ask a new question


ME/CFSCerebral PalsyParkinson'sLong CovidMultiple SclerosisMCASCystic FibrosisStrokeEpilepsyEndometriosisMigraineALSLupus
Treatments
Download community app

Ask a new question


ME/CFSCerebral PalsyParkinson'sLong CovidMultiple SclerosisMCASCystic FibrosisStrokeEpilepsyEndometriosisMigraineALSLupus
Treatments
Download community app
Long Covid/Treatments/Anticoagulant
Anticoagulant
Pharmacological

Anticoagulant

What is it: Combats microthrombi for improved microcirculation after prolonged viral recovery
Researched
Quantity and depth of existing academic research
  1. ⬤ Minimal research: Very little scientific study exists, with no or very few peer-reviewed studies. Insufficient data for conclusions.
  2. ⬤⬤ Limited research: Few studies exist, mostly small trials or case reports. Findings are preliminary and lack strong validation.
  3. ⬤⬤⬤ Moderately researched: Multiple studies, including mid-sized trials, exist. Some findings are replicated, but more research is needed.
  4. ⬤⬤⬤⬤ Well-researched: Supported by substantial evidence, including at least one large trial or meta-analysis.
  5. ⬤⬤⬤⬤⬤ Extensively studied: Numerous large studies and meta-analyses exist. Findings are widely accepted with strong scientific consensus.
 
Ease of access
How easy it is for the average patient to access this treatment
  1. ⬤ Extremely Difficult to Access: Rare, experimental, or highly specialized. Requires multiple referrals, long wait times, travel, and strict follow-up.
  2. ⬤⬤ Difficult to Access: Limited to select centers with moderate barriers. Requires referral, potential travel, and wait times of weeks to months.
  3. ⬤⬤⬤ Moderately Accessible: Available in larger hospitals or clinics. Requires a basic referral, with moderate wait times and some coordination.
  4. ⬤⬤⬤⬤ Easy to Access: Widely available in most clinics. Minimal referral, short wait times, and simple preparation or follow-up.
  5. ⬤⬤⬤⬤⬤ Trivial to Access: Easily found in pharmacies or clinics. No referral needed, minimal wait, and straightforward access.
 
Cost
How much in USD does it approximately cost for a patient to see the benefits of this treatment.
  1. ⬤ Up to $100
  2. ⬤⬤ Up to $500
  3. ⬤⬤⬤ Up to $2000
  4. ⬤⬤⬤⬤ Up to $10,000
  5. ⬤⬤⬤⬤⬤ More than $10,000
 
Reported effectiveness
The average perceived effectiveness of the treatment amongst the patient views found for this page.

To calculate the reported effectiveness for a patient view, the model first analyses whether it can be ascertained that the person writing the review has had direct experience of the treatment for themselves or a loved one. If so, it then uses sentiment analysis to rate their view from 1-5 on how effective this treatment was for them, with 1 being the least effective, and 5 the most effective.

 
Best suited for: Severe fatigue cases; Breathing difficulties; Cardiovascular complications; Clot-prone individuals
last updatedTue, 07 Oct 2025
curated byTurnto community

15 Resources

Referenced in this guide

21 Research papers

Referenced in this guide

15 Expert views

Contributed in this guide

40 Patient views

Contributed in this guide

Figure out what Anticoagulant means for you

Page contents

Basics: What you need to know

Over the course of the pandemic, researchers began identifying abnormal clotting mechanisms—often referred to as microthrombi—in people experiencing persistent symptoms after a COVID-19 infection. These findings led to the development of anticoagulant treatment protocols involving low molecular weight heparin (LMWH) or direct oral anticoagulants (DOACs). By specifically targeting clotting pathways under established clinical guidelines, these treatments aim to mitigate thromboembolic risks, reduce microvascular damage, and potentially enhance overall recovery for individuals managing lingering post-COVID complications.

History and development

  • Earliest recognition: During the acute phase of COVID-19, doctors noted heightened clotting risks, prompting investigation into similar issues for those with prolonged symptoms. Early observations by researchers, such as Dr. Resia Pretorius, who identified microclots in affected individuals, helped guide initial anticoagulant protocols.
  • Refinement of protocols: As clinical insights grew, specialists introduced dosing guidelines and risk stratification measures, honing the treatment to focus on microthrombi and microvascular inflammation. Collaborative efforts between hematologists, cardiologists, and infectious disease experts shaped these evolving standards.
  • Influential studies: Preliminary trials demonstrated improvements in certain post-COVID symptoms with targeted clot inhibition. These findings encouraged broader research, although most protocols still proceed cautiously, emphasizing safety and personalized care.

What is known

  • Mechanism of action: LMWH and DOACs reduce clot formation by targeting specific coagulation factors, limiting microclots that may contribute to comfort issues, fatigue, or organ dysfunction.
  • Monitored approach: Clinicians rely on established guidelines, including blood tests and imaging, to assess each patient’s clotting risk and to determine optimal dosing and duration. This reduces the chance of complications.
  • Potential risks: Bleeding is the primary concern, as anticoagulants slow the clotting process. Clinicians must consider issues like anemia or pre-existing bleeding disorders when prescribing.
  • Lesser-known benefits: Besides reducing clot burden, careful use of anticoagulants may improve microcirculation and oxygen delivery. Some reports suggest patients experience better exercise tolerance and reduced inflammatory markers over time.
  • Symptom improvement: While not universally effective for every patient, controlled anticoagulant therapy has shown promise in diminishing fatigue and neurological symptoms in some individuals with long COVID.

What is not known

  • Long-term outcomes: Though preliminary studies are encouraging, definitive data on extended safety and efficacy of long COVID anticoagulation are still limited.
  • Individual variability: Responses differ widely, making it challenging to predict which patients will see the greatest benefit or be more prone to side effects.
  • Optimal dosing: While standardized guidelines exist for acute thrombosis, their adaptation to microthrombi cases remains under investigation, and future research will clarify dosage and treatment length.
  • Underlying mechanisms: More work is needed to fully understand how microclots and other vascular factors interplay with long COVID symptoms, potentially revealing new therapeutic targets or adjunct treatments.
  • Inhibits clotting factors: Blocks proteins in the coagulation cascade to prevent abnormal clot formation.
  • Reduces microthrombi: Targets small clots that can obstruct blood flow and worsen post-viral symptoms.
  • Enhances circulation: Improves blood vessel function by diminishing blockages and restoring oxygen delivery.
  • Mitigates inflammation: May lower certain inflammatory markers linked with vascular damage and clotting.
  • Bleeding risk: Includes nosebleeds, easy bruising, or more serious hemorrhagic events.
  • Gastrointestinal issues: Some may experience stomach pain or discomfort due to medication.
  • Skin reactions: Injection-site irritation or itching can occur, particularly with LMWH.
  • Drug interactions: Concomitant use of certain medications may potentiate bleeding risk or reduce formula efficacy.
  • Clinical variability: Some doctors see significant improvements, while others report minimal benefit.
  • Evidence gaps: Ongoing trials yield mixed outcomes, making definitive guidance challenging.
  • Balancing risks: The potential for bleeding fuels debates on whether benefits outweigh drawbacks.
  • Insurance coverage: Different views persist on cost-effectiveness and accessibility for patients needing prolonged treatment.

Patient views

Experiences

  • Patients appreciate significant symptom improvement, including reduced brain fog and fatigue.
  • Many report better physical activity levels, like walking longer distances.
  • Some find relief from cardiac symptoms, such as palpitations.
  • Blood thinners are seen as effective for addressing microclots.

Challenges

  • Risk of bleeding and bruising is a major concern for patients.
  • Some experience worsening symptoms initially before improvement.
  • Relapses occur for some after stopping anticoagulants.
  • Long-term use may be required, raising safety concerns.

Tips

  • Consult an experienced doctor before starting anticoagulants.
  • Be prepared for initial worsening of symptoms.
  • Use stomach-protecting medications with aspirin.
  • Early treatment may improve chances of long-term success.
Reported effectiveness
The average perceived effectiveness of the treatment amongst the patient views found for this page.

To calculate the reported effectiveness for a patient view, the model first analyses whether it can be ascertained that the person writing the review has had direct experience of the treatment for themselves or a loved one. If so, it then uses sentiment analysis to rate their view from 1-5 on how effective this treatment was for them, with 1 being the least effective, and 5 the most effective.

 

Sorted by relevancy

Patient view

I had HELP apheresis, hyperbaric oxygen and blood thinners to address microclots. Probably all helped to some extent but I think probably the blood thinners most, given that the patient got a significant step-wise improvement with each titration up in dose.

The patient took clopidogrel and apixaban (was recommended aspirin too to make it ‘triple therapy’ but can’t tolerate aspirin). Obviously these meds aren’t without risk and need an experienced doctor to prescribe.

Over a few months, these meds got the patient from mainly sofa bound to walking 3 km a day, and improved severe brain fog to more of a moderate cognitive fatigue. Unfortunately after a few months the patient relapsed and we now think that there’s something very inflammatory and/or autoimmune going on - but other people have maintained their progress from blood thinners, especially if they’re treated earlier in illness.

‘Triple Therapy’ and ‘Professor Resia Pretorius’ are good search terms if you want to google more about the science! 😊

December 2024 • Turnto Comment

Patient view

I started trying platelet aggregation inhibitors (aspirin) due to chronic cardiac pain in 10/23 (no cardiac deficiency found). I must say it has helped with pain a lot and somehow was matching those microclot theories that were published. I am however unsure… Is there anyone who has also tried this? What are your experiences?

June 2024 • Turnto Consumer Review

Read all (40)

Expert views

What they liked

  • Experts appreciate anticoagulants for addressing microclots in Long Covid.
  • Positive outcomes include improved oxygen and nutrient delivery to tissues.
  • Anticoagulants are well-established in treating cardiovascular issues.
  • Some patients report significant symptom relief with anticoagulants.

What they didn't like

  • Risk of bleeding is a major concern with anticoagulants.
  • Self-prescribing anticoagulants can be dangerous without medical oversight.
  • Anticoagulants may not address underlying causes of Long Covid.
  • Some patients do not experience improvement despite anticoagulant use.

What are they unsure about

  • Experts are uncertain about the long-term efficacy of anticoagulants.
  • Debate exists on whether microclots are a cause or symptom of Long Covid.
  • Unclear which anticoagulant combinations work best for patients.
  • More research is needed to confirm microclots' role in Long Covid.

15 expert views

Sorted by relevancy

Expert view

Dr. Alec Schmaier, a cardiology and vascular specialist, discusses the potential role of anticoagulants in treating Long Covid. He explains that microscopic blood clots, which are too small to detect with standard imaging techniques, might contribute to Long Covid symptoms. These clots could impair gas exchange in the lungs and cause exercise intolerance and fatigue, similar to pulmonary hypertension. While anticoagulants are used in pulmonary hypertension, their effectiveness in Long Covid remains uncertain due to limited research and challenges in detecting endothelial damage. Dr. Schmaier emphasizes the need for further studies and better diagnostic tools to address clotting issues in Long Covid.

May 2022 • Episode 36: Dr Alec Schmaier - endothelium and the vascular system

Expert view

Dr. Asad Khan discusses the use of Triple Anticoagulant Therapy (TAT) for Long Covid, emphasizing its role in addressing microclots and overactive platelets. He highlights that combining three drugs—aspirin, clopidogrel, and an anticoagulant like heparin or apixaban—has shown significant benefits. This combination reduces the need for multiple cycles of apheresis, a blood filtration process. Dr. Khan also notes that while the treatment is intense, it has been effective in improving symptoms for many patients, though further research is needed.

December 2021 • Episode 21: Dr Asad Khan - H.E.L.P. Apheresis

Read all (15)

What and who it targets

Best suited for

Severe fatigue cases

Fatigue linked to poor circulation

Breathing difficulties

Linked to vascular blockages

Cardiovascular complications

Heart-related issues from Long Covid

Clot-prone individuals

High risk of blood clot formation


Relevant research

How much evidence on this?

  • Substantial evidence from 10+ peer-reviewed studies.
  • Research spans over 3 years since 2020.
  • Studies include randomized trials and observational cohorts.
  • Consistent findings across multiple journals.

Research focusing on

  • Anticoagulants may reduce thrombotic complications.
  • Post-treatment monitoring is crucial for bleeding risks.
  • DOACs show promise in reducing cardiovascular events.
  • Researchers exploring combined anti-inflammatory approaches.

What needs more research?

  • Long-term safety of extended anticoagulation unclear.
  • Optimal timing for therapy initiation remains undefined.
  • Effectiveness in diverse patient populations needs study.
  • Mechanisms of microclots in Long COVID still uncertain.
Level of research
Quantity and depth of existing academic research
  1. ⬤ Minimal research: Very little scientific study exists, with no or very few peer-reviewed studies. Insufficient data for conclusions.
  2. ⬤⬤ Limited research: Few studies exist, mostly small trials or case reports. Findings are preliminary and lack strong validation.
  3. ⬤⬤⬤ Moderately researched: Multiple studies, including mid-sized trials, exist. Some findings are replicated, but more research is needed.
  4. ⬤⬤⬤⬤ Well-researched: Supported by substantial evidence, including at least one large trial or meta-analysis.
  5. ⬤⬤⬤⬤⬤ Extensively studied: Numerous large studies and meta-analyses exist. Findings are widely accepted with strong scientific consensus.
 

Sorted by relevancy

Research

This paper explored the role of blood clotting (thrombosis) in long COVID and how early use of anticoagulants might help. It reviewed evidence on how damage to blood vessels and chronic inflammation contribute to complications in long COVID.

The study found that long COVID is closely linked to blood clotting issues, which worsen inflammation and organ damage. Early use of anticoagulants was shown to potentially reduce these complications and improve patients' quality of life.

For people with long COVID, this research suggests that anticoagulants might help prevent worsening symptoms related to blood clots and inflammation. It highlights the importance of addressing vascular health early in the treatment process.

The paper is a literature review published in a reputable journal, 'Frontiers in Cellular and Infection Microbiology,' which specializes in infectious diseases. While it provides valuable insights, it relies on existing studies rather than new experimental data.

April 2022 • Frontiers in cellular and infection microbiology

Research

This study examined the long-term effects of different anticoagulant treatments, specifically Vitamin K antagonists (VKA) and direct oral anticoagulants (DOACs), on patients who had COVID-19. Researchers tracked 157 patients over two years to evaluate changes in anticoagulant prescriptions and their impact on health outcomes.

The study found a significant shift from VKA to DOACs, particularly among high-risk patients, with a 10.2% increase in DOAC recommendations. Despite this, there was a rise in health issues such as joint diseases (14%), cardiomyopathies (3.9%), and psychoanxiety disorders (39.5%), suggesting persistent complications from long COVID.

For individuals dealing with long COVID, this study highlights the importance of tailored anticoagulant treatments, as complications like inflammation and mental health issues may persist. It suggests that while DOACs are increasingly preferred, they may not fully address all long-term health risks associated with the condition.

The study is moderately reliable as it is a clinical study published in a reputable journal, 'In vivo (Athens, Greece).' However, the sample size of 157 patients is relatively small, and further research is needed to confirm these findings across larger populations.

October 2024 • In vivo (Athens, Greece)


Accessibility

Ease of access
How easy it is for the average patient to access this treatment
  1. ⬤ Extremely Difficult to Access: Rare, experimental, or highly specialized. Requires multiple referrals, long wait times, travel, and strict follow-up.
  2. ⬤⬤ Difficult to Access: Limited to select centers with moderate barriers. Requires referral, potential travel, and wait times of weeks to months.
  3. ⬤⬤⬤ Moderately Accessible: Available in larger hospitals or clinics. Requires a basic referral, with moderate wait times and some coordination.
  4. ⬤⬤⬤⬤ Easy to Access: Widely available in most clinics. Minimal referral, short wait times, and simple preparation or follow-up.
  5. ⬤⬤⬤⬤⬤ Trivial to Access: Easily found in pharmacies or clinics. No referral needed, minimal wait, and straightforward access.
 
Cost
How much in USD does it approximately cost for a patient to see the benefits of this treatment.
  1. ⬤ Up to $100
  2. ⬤⬤ Up to $500
  3. ⬤⬤⬤ Up to $2000
  4. ⬤⬤⬤⬤ Up to $10,000
  5. ⬤⬤⬤⬤⬤ More than $10,000
 

Method to access

  • Typically accessed through specialized clinics or hospitals.
  • Referral may be required for insurance purposes.
  • Some clinics offer telehealth consultations for initial assessments.

Cost

  • Rivaroxaban treatment costs approximately $53.37 per patient for a 35-day course in the United States.
  • Costs for other anticoagulants like Heparin or Enoxaparin may vary but are generally low to moderate.
  • Prices may differ in other regions; specific estimates are unavailable.

Insurance cover

  • Insurance coverage for anticoagulant treatment for Long Covid is inconsistent.
  • Some patients report high out-of-pocket costs due to denied claims.
  • Coverage may depend on the insurer and the documented medical necessity of the treatment.

Locations

  • Cleveland Clinic's reCOVer Clinic specializes in Long Covid treatment.
  • MedHelp Clinics offer anticoagulant therapy as part of their Long Covid care.
  • Some private clinics in Europe, including Cyprus and Germany, provide similar treatments.
  • Other specialized centers may offer this treatment; consult local healthcare providers.

Frequently asked questions

They can be effective for symptoms linked to circulation issues, but not all Long Covid symptoms.
Yes, they may increase bleeding risk, especially in patients with bleeding disorders.
Duration varies based on individual needs, ranging from weeks to months.
Anticoagulants are usually taken orally or via injection. Some patients may experience mild bruising or bleeding as a side effect.

Key resources

Episode 36: Dr Alec Schmaier - endothelium and the vascular system

Episode 36: Dr Alec Schmaier - endothelium and the vascular system
Learn more

Episode 21: Dr Asad Khan - H.E.L.P. Apheresis

Episode 21: Dr Asad Khan - H.E.L.P. Apheresis
Learn more

Episode 2: Dr Elaine Maxwell - The Long Covid Data Queen

Episode 2: Dr Elaine Maxwell - The Long Covid Data Queen
Learn more

Explore other treatments

More treatments
More treatments

It's a lot of information, isn't it?

Turnto's personal AI Assistant can help you figure out what this all means for you

Turn on alertsNext in 0m
Get everything related to you in one easy update.

TermsPrivacyDisclaimerContact

© 2026 Turnto

Explore other treatments

More treatments
Anti-inflammatory diet

Anti-inflammatory diet

A structured nutritional approach focusing on evidence-based anti-inflammatory foods
Electrolytes

Electrolytes

Calcium, MagnesiumA precisely tailored mineral regimen restoring cellular hydration and function
Calcium channel blockers

Calcium channel blockers

CCBsA targeted protocol repurposing heart medications to alleviate autonomic dysfunction.
More treatments