YES, you can donate blood if you smoke or consume cannabis. Let's break the stigma! , All donors go through the same health screening. All blood donations are tested for several types of infections, Can Smoking Marijuana Increase Stroke Risk? Health Matters NYP Can You Donate Plasma If You Smoke Weed? My Marijuana Cards Think you can't donate blood? Think again. Australian Red Cross Lifeblood Can You Donate Blood if You Smoke Weed? Mango Cannabis Smoking (or vaping) doesn't affect your ability to donate blood. Help us bust this myth by sharing our post.