Sort of mentioned in one of the side notes:

Acetaminophen is the only medication of its kind approved for infants under six months because the liver develops faster than the kidneys.

I've known people who've overdosed on Tylenol and died. I'm not saying that ibuprofen won't give you acid reflux and won't damage your kidneys, but due to <reason> I tend to take a lot of ibuprofen and also for <reason> take another medication that constricts my arteries and for <reason> get a lot of blood/urine work done... and my kidney function is good and despite everything I'm generally healthy. So I would say, like many things, what medicines you take probably depend on your specific body and situation. Regardless, you won't die accidentally from an acute ibuprofen overdose. You just might die from taking tylenol if you don't realize your liver is already damaged for other reasons. So there you go!

I created this open-source application (https://alexcpn-faers-signal-detection.hf.space/) to analyse the FDA FAERS data set a few weeks back, just to do some good work and use Claude Code completely. I got roasted on Reddit for attempting this. But this is meant for specialists to use, as most platforms that analyse this data charge a lot from what I read.

FDA FAERS is the official dataset for reporting Adverse events from taking a drug. FDA adverse event reports about 2 million cases and 4,067 unique drugs

I agree the results are not easy for non medical professionals to interpret correctly. For example DEATH is very strong with Parecetemol and so is DEPENDECE. The latter because from AI it is a confounding factor. Acetaminophen/parecetemol is frequently co-formulated with opioids (like Hydrocodone or Codeine). The "Dependence" signal is likely attributed to the opioid, not the Acetaminophen itself...

Adverse Event Acetaminophen PRR (95% CI) Acetaminophen n ibuprofen PRR (95% CI) ibuprofen n ACUTE KIDNEY INJURY 0.87 (0.80-0.96) 498 4.27 (3.91-4.67) * 483 ANAPHYLACTIC REACTION 0.61 (0.51-0.72) 122 9.85 (8.90-10.90) * 382 ANGIOEDEMA 1.31 (1.13-1.53) 170 15.26 (13.77-16.92) * 378 DEATH 1.44 (1.40-1.49) 3958 0.07 (0.06-0.10) 42 DEPENDENCE 237.12 (231.51-242.88) * 39679 0.02 (0.01-0.05) 4 DEPRESSION 2.18 (2.05-2.31) * 1157 0.39 (0.29-0.52) 43 DRUG EFFECTIVE FOR UNAPPROVED INDICATION 16.77 (16.11-17.46) * 3180 44.17 (42.18-46.25) * 1921 DRUG HYPERSENSITIVITY 0.57 (0.51-0.64) 327 3.30 (2.98-3.65) * 372

If you have serious pain, you probably need both of them.

I had intestinal bleeding after double ibuprofen dosage over several weeks for back pain. Definitely watch out for any prolonged and heavy use of NSAIDs.

Cool, throughout this entire read I was thinking "I'm gonna save this, it reads a lot like dynomight". And then at the end it turns out it was dynomight all along. I guess I should read headers more carefully.

I’ve alternated these for fever, especially for kids, especially when it’s high and hard to control. That way you keep below the daily limit of each and don’t overdose on either.

Have gotten into a habit of keeping a note of which med when on the fridge.

If you take either of these medications regularly talk to your doctor.