Cannabis Use and Blood Donation: Unmasking the Truth Can You Donate Blood If You Smoke? Cannabis, Nicotine, and More Can You Donate Plasma with Asthma? 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 Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Can Smokers Donate Blood in India & its Side Effects?