Hi Hugh - you're more than welcome to call our Donor Center at 877-25-VITAL and talk to one of our specialists. You can also review the list of medications (https://vitalant.org/BS_351M) advised against donating blood. Warfarin as a blood thinner is unfortunately on that list, which means you could be at risk if you donated blood. We thank you for your interest and encourage you to stay healthy! Very best, Fernando @ Vitalant
Don't know, you should call them and ask
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