True, because “aspirin” became a generic name in the US a long time ago. But “ASA” is extremely common throughout the rest of the world:
Wow. Today I learned.
Chalk up another SDMB misunderstanding to unwarranted and unnoticed US-centrism.
Well, today i learned. If I’d seen that box yesterday, i would not have had a clue what it contained.
I’ve rediscovered Tylenol since I’ve been placed on blood thinners and can’t take NSAIDs. I have occasional back pain from three bulging thoracic discs, and once it acts up it lasts for days as mid level but very nagging pain when I sit for long periods. It acted up last week on 13 hour flight from Hong Kong, yikes. I took 500mg Tylenol and found great relief, to my surprise! I popped a couple total on that flight and was quite comfortable, where before I boarded it was pretty tough going.
Extremely common in the US medical/nursing community too, it’s how I’ve written it (ASA) and dictated it since med school over 40 years ago.
For my wife too, back in the early 70’s and onward. Though now she finds diclofenac (voltaren) works best for her aches and pains. She will default to motrin at times, but says naproxen does nothing for her pain so won’t take it any more.
While studies have never shown any one particular NSAID to be better at pain relief than any other in general, it is known that there’s a great deal of individual variation among patients. And sometimes one can decide by family history which NSAID is best to try for a patient. If someone tells me their mom got great relief from meloxicam, I may go with that first (at least I did that before retiring).
Otherwise, when trying to find what will work for a patient, I’ll go from one class of NSAID to another, making sure to try all 5 classes, along with celebrex (a Cox 2 NSAID). And hopefully I didn’t burn out their stomach or shut down their kidneys in the process.
Well, add me to the list of “today I learned”!
Also, kinda getting off topic, but Aspirin™ wasn’t the only trademark Bayer lost. They also lost the trademark rights to Heroin™:
Good luck getting the Cali cartel (or the Hell’s Angels) to pay royalties. 
Tylenol 3, works well enough. Normal Tylenol does nothing.
I truly thought it was miracle, when at some point in the 80’s, when I was having massive headaches fairly often, and I took an Ibuprofen, and it actually did something to make it go away. Those headaches are far less often as an adult, but Ibuprofen still makes them go away.
Just yesterday, a friend called me asking which was better for a headache - advil or ibuprofen.
(I explained that they were the same drug, and then explained the whole ibuprofen vs Tylenol thing, as best I could.)
You can always do Excedrin, which hits you with acetaminophen, aspirin (ASA), and caffeine all at once. That’s always worked great for me on headaches (which I think is its main purpose). Regular ibuprofen or aspirin as well. Naproxen, for some reason, doesn’t seem to do much for me. Not sure why. Tylenol is somewhat effective, but aspirin has been my go-to for aches, fevers, and pains, followed by ibuprofen. Tylenol I use when I need to dovetail the medications, so NSAID, two to three hours later, Tylenol, two hours later an NSAID, etc. But it is curious to me that naproxen doesn’t seem to do much, while ASA and ibuprofen do. Naproxen seems to be marketed most towards back pain, and when I’ve had debilitating back pain in the past, it was next-to-useless for me. But other NSAIDs did offer some relief.
Acetaminophen is the best at stopping pain for me. Aspirin is a close second. With everything else I can’t tell the difference between them and not taking anything.
I take Acetaminophen and aspirin together and it seems to be even better than either of them. Maybe because I take it for all sorts of pain so I don’t have to experiment to see which one is best for which sort of pain. I have an iron stomach, pain-killer-wise, so I even take them on the couple of times a year I have heartburn, and it works even then.