what's the diuretic called?
...the reason i ask is because some prescription diuretics, such as lasix (furosemide) interact w/ aspirin and other NSAIDS such as ibuprofen and naproxen sodium. be very careful; combining these may lead to kidney failure!

also, aspirin won't do shit for you in terms of help you pass the drug test. taking massive amounts of aspirin (as suggested in some places in the forum) is just straight up bad for your body.

since you smoke daily i would say your best bet is to substitute your shit by getting clean pee from someone you know. do this by taping a hand/foot-warmer to a small 2 oz. bottle filled w/ the pee. strap the warmer/bottle complex to your balls or cheek it.

if you can't substitute then i would resort to dilution by loading up on creatine 2-3 days before test (15-20grams/day) and take massive amounts of b complex vitamins.

also...do you know what company your drug test will be with (i.e. labcorp)?
if it's w/ labcorp substitute. if it's w/ any other company then idk if subbing is a good idea unless you can talk to someone who has taken the test for the same job in the past.