Can You Donate Blood or Plasma if You Use Cannabis? Myth: You can't donate blood if you smoke or drink. Fact: Smoking or occasional drinking doesn't automatically disqualify you. But avoid alcohol for at least 24 hours before donating to Severe bleeding linked to synthetic cannabinoid use Texas Poison Center Network Can Weed Smokers Donate Plasma in the USA in 2024? Weed And Donating Blood: All You Need To Know Moose Labs 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