I gave blood today.. 470ml... would this make any difference to the dosage of etizolam I would need to take? I know they say not to drink afterwards because it gets you super drunk... would it be the case with other drugs too?
Drink lots of fluids and you'll be fine. THe reason they don't want you doing psychoactive drugs is 'cause your blood pressure will be really low and leads to an increased risk of fainting.