ok thanks burnt toast, but do you think that it hurts to use the aspirin?
It would be a waste of time and energy.

I mean a chance of trigering a false positive?
Aspirin doesnt create false-positives. Theres really no false-positives anymore.
False positives are eliminated when the urine sample undergoes a confirmation GC/MS. The GC/MS would distinguish between illicit substances and OTC/scripted meds.