Yeah, plasma is separated from the bulk of your blood and your red blood cells and platelets get returned, so the drug doesn't carry in the plasma. Drug testing isn't standard before plasma donation, but it is illegal to donate any bodily substances if you have ever been an IV drug user, had sex with one, have had anal sex with a gay man, or have had sex with someone who has;among other restrictions
I DON'T THINK THEY urine
Thanks! Your answer is awaiting moderation.