| http://www.w3.org/ns/prov#value | - However, you must wait 48 hours after taking aspirin or any medication containing aspirin before donating platelets by apheresis. warfarin (Coumadin), heparin or other prescription blood thinner: Wait seven days after discontinuing. human pituitary-derived growth hormone: You are not eligible to donate blood. hepatitis B immune globulin (given for exposure to hepatitis): Wait 12 months after expos
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