Here's one you haven't heard before:
I want to make my BBB leaky temporarily. I'm set for a PCR Toxoplasmosis test, figure they are in my brain, want them to be able to get out, and into the bloodstream a day or two before the test to increase likelihood of detection.
What affect does aspirin have on the blood-brain barrier? Is there anything I can take or eat that will make stuff cross more than usual? Maybe phenylalanine?