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 Cannabis Use and Blood Donation: Unmasking the Truth Did you know: You CAN donate blood if you use cannabis. If you have any questions about blood donation, please ask us! #DidYouKnowAboutBloodDonation Risks of marijuana and THC on the heart: What you need to know Vaping Cannabis Produces Stronger Effects Than Smoking Cannabis For Infrequent Users Johns Hopkins Medicine