Okay, it's not really a specific nursing question but I haven't been able to find the answer and nobody else has known it. I should have probably asked you guys first, but...hopefully you can still help. I would like to donate blood but I take a prescription med, to prevent migraines that I get, Amitriptyline. How long does it take for that to get out of my blood stream? Thanks! Have a grrrreat day!