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 Cannabis Use and Blood Donation: Unmasking the Truth CBD Cannabis and voluntary blood donations: what is the rule? Justbob Smoking (or vaping) doesn't affect your ability to donate blood. Help us bust this myth by sharing our post. 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