NICHS Vaping Campaign We all know smoking and vaping isn't great for your health. But it doesn't stop you from being a blood or plasma donor. Just make sure to wait one hour after donating Can you donate blood if you smoke? Can Marijuana Use Prevent You From Giving Blood? FAQs Shepeard Blood We all know smoking and vaping isn't great for your health. But it doesn't stop you from being a blood or plasma donor. Just make sure to wait one hour after donating