500mg from a capsule and 500 from cough syrup 4 times a day is still fine. With a 100% safety margin still.

If you’re taking more meds than that without clinical supervision Id say something is wrong in the system or your medicine practices.

Where I’m from it’s common to walk to the nearest pharmacy and get meds when needed. Even over the counter stuff like paracetamols. And talking to the pharmacist. They’ll ask what you’re already taking and tell you what else to get.

8g is not an insignificant amount. That's 16 500mg pills. You really need to mess up to take 16 pills and not realise you're doing something wrong. If a patient is not lucid than we have bigger issues.

And from what I see in pharmacies, you would rarely see a "cough syrup" called just like that if it contains paracetamol. It would usually be marketed as a flu-relief all-around symptom relief.

Yeah this is optimizing for the good case instead of tail risks and mistakes and we see too many overdoses already.

Of course, we could press the fix this immediately button by requiring acetaminophen to be sold mixed with NAC but that would be too easy.