Can you donate blood if you sometimes smoke marijuana? (USA)?

Question

And if not, what is the reason why? Sources would be nice, if you have them (:

If you don't know what you're talking about, please don't answer.

Thank youu

Answer 1

I used to all the time.  And since I have good plasma, they used to borderline harass me to do pheresis every week.

Answer 2

I've looked it up and nothing I have found says that you can't if you smoke marijuana.  You CANNOT donate blood if you have injected yourself with drugs not prescribed by a physician. As long as you are healthy, and you meet the requirements, please donate so you can save someone's life.

Answer 3

According to some of the Red Cross chapters, yes, you can - as long as you are not under the influence at the time of the donation (see links below).

That surprised me.  I guess it clears the body quickly enough that unless you are high at the time, there is no real danger.

Answer 4

Yes you can.  Blood banks don't even test for THC.  But don't donate while you're high.  A person sick enough to need a transfusion doesn't need the THC.