As COVID-19 vaccination continues to present to older and clinically qualified people throughout the country, many concerns arise for those taking blood thinners.
The most important point is that COVID-19 vaccine is fine for practically all individuals, no matter whether they have a thrombophilia, a prior deep vein thrombosis (DVT) or pulmonary embolism (PE), or are on a blood thinner.
Reasons not to get the vaccine have to do with allergic reactions however not with the fact that a client has actually had a clot or is on an anticoagulant. While COVID-19 infection is associated with an increased risk of DVT and PE, especially in the really sick and hospitalized client, there is no factor to believe that the vaccine would increase the threat for blood embolisms.
Many clients do not need to interrupt their anticoagulant before getting the vaccine. It has been revealed that intramuscular flu shots in clients on full-dose warfarin (Coumadin, Jantoven) do not increase the risk for bleeding at the website of the injection.
Similarly, it is reasonable to believe that the danger for substantial bleeding into the muscle is likewise not increased in a client who takes a direct oral anticoagulant– apixaban (Eliquis), dabigatran (Pradaxa), edoxaban (Savaysa), or rivaroxaban (Xarelto)– or other anticoagulant like enoxaparin (Lovenox) or fondaparinux (Arixtra).
The FDA’s COVID-19 vaccine factsheet requires patients to inform their service provider prior to getting the vaccine if they have a bleeding disorder or are on a blood thinner however does not supply any assistance for the company. A few formal documents from societies and federal agencies provide beneficial input.
There is no benefit of providing a vaccine subcutaneously when it is really indicated to be offered intramuscularly, as that would not alter the bleeding threat That’s true even in the client with a bleeding condition or on an anticoagulant, according to the CDC’s Advisory Committee on Immunization Practices
That group recommends scheduling vaccination prior to taking the blood thinner for the day, if possible. It also recommends utilizing a fine-gauge needle (23- gauge or smaller sized) and applying firm pressure to the injection site, without rubbing, for at least 2 minutes. The patient or family ought to be given details on the threat for development of a hematoma.
The International Society on Thrombosis and Haemostasis (ISTH) advises using pressure to the injection site for longer– at least 5 minutes– to reduce the danger for bruising. It also recommends that patients on warfarin (Coumadin, Jantoven) wait until the INR drops listed below 4.0 prior to getting the injection.
For the client who is on a blood thinner, I am a little more mindful than what is mentioned in the ISTH file. I even suggest the client ask the individual injecting what gauge needle will be used and request a 25 gauge needle if the response is any larger.
I likewise recommend to consider avoiding the morning dosage of the blood thinner prior to the vaccination or the evening dose the day prior to vaccination when it comes to a drug taken once daily at night.
Skipping one dose, or perhaps 2, may be especially a good idea for the client who is on among the blood thinners pointed out above plus another antithrombotic, whether aspirin, clopidogrel (Plavix), ticagrelor (Brilinta), or another anti-platelet drug.
If on warfarin, I advise getting INR determined 2 to 5 days prior to the injection. If above 3, consider whether the patient ought to skip or reduce the next two warfarin doses or delay the immunization.
Stephan Moll, MD, is a professor in the Department of Medicine and Department of Hematology at the University of North Carolina at Chapel Hill. He is medical director of UNC’s Embolism Link education program, where a patient-focused variation of this post initially appeared.
Last Updated March 12, 2021
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