If you drink alcohol, you can drink, but it has to be out of your body’s system. it is recommended you not have booze 24 hours before donating. Like alcohol, you can donate blood, but you have to let the marijuana move out of your system. Potential donors cannot give if cannabis use impairs their memory or comprehension. The Red Cross does not test blood donations for the presence of tetrahydrocannabinol, or THC, the principle psychoactive component of the cannabis plant. But you should wait 24 hours from the last time you are high.
Donating blood is easy. You go to the nearest location, sign in, show ID, and read some information. You’ll answer questions online or in person, and receive a health check.
The acutional process is easy, a sterile needle is inserted into a vein in your arm, and blood is drawn into a bag. The donation usually takes 8–10 minutes and feels like a quick pinch. Afterwards they providea snack and drink and 10–15 minutes to recovery before resuming your day.
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