Can Cannabis Users Donate Blood Red Cross Can Smokers Donate Blood in India & its Side Effects? 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 Cannabis Use and Blood Donation: Unmasking the Truth Can You Donate Blood If You Smoke? Cannabis, Nicotine, and More