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 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 Weed? Mango Cannabis EventDetail Can You Donate Blood If You Smoke? Our Blood Institute Most Commonly Googled Questions About Blood Donation Answered by the Experts, Part 2 Stanford Blood Center