Can You Donate Blood If You Use Cannabis? Alternaleaf UK Think you can't donate blood? Think again. Australian Red Cross Lifeblood Smoking (or vaping) doesn't affect your ability to donate blood. Help us bust this myth by sharing our post. Yes, you can donate blood if you smoke or consume cannabis. The recipient of the blood will not get high, another common MYTH. All donors go through the same health Severe bleeding linked to synthetic cannabinoid use Texas Poison Center Network