I'd follow stans guide & say the less you ingest the better, you wanna keep it down so the anti sickness options are important. The more you add then the higher chance of being sick which undoes the point of it all.
Paracetamol should be fine & not sure if codeine would create an issue.
All those otc options called ...olol this or ....adin that are basically very overpriced paracetamol or Ibuprofen with shit you don't need thrown in like caffeine or aspirin etc... to get a patent so they can charge whatever due to lack of competitors in the market.
They're no more effective than taking different drugs together.
Otc is generally trash anyway & the good stuff is highly restricted.
there are lists of strengths online...
fentanyl
heroin
morphine
oxycdone
tramadol
codeine
...and some inbetween all of those that are different strengths. Some cause abdominal pain for some. Morphine makes me feel sick, but Oxy I'm fine with. Oxy mixed with Cocaine is the ultimate pain killer and happiness eascerabter for me. But then I've never snorted heroin and coke together, so that's likely even better. Add some amphetamine to that, and 'oh my gosh', that would be happieness!
You get all that from a dealer or darknet?