Teen Vaping: What Parents Can Do Children's Hospital Colorado Smoking (or vaping) doesn't affect your ability to donate blood. Help us bust this myth by sharing our post. Can You Donate Plasma If You Smoke Weed? Get Facts Here! The Sanctuary Can You Donate Plasma If You Smoke Weed? My Marijuana Cards 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 Can you donate blood if you smoke?