Can You Donate Plasma If You Smoke Marijuana? 2023 Guide to Cannabis Use & Donating Blood Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Smoking and vaping don't affect your eligibility to donate. Become a donor and give life today. Severe bleeding linked to synthetic cannabinoid use Texas Poison Center Network Think you can't donate blood? Think again. Australian Red Cross Lifeblood 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