system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is the dosage for medicine in tablet form given as "child" or "adult", rather than by the weight of the patient? (MIC)

For example, i am 6'-5" and 240lbs, while my wife is 4'-11" and 105lbs, yet the bottle of Tylenol gives the dosage as 2 pills for adults. Surely, since i am twice as large as my wife, my dosage should be higher. It seems more logical that they would have dosages listed for body weight ranges.
gpt
> It seems more logical that they would have dosages listed for body weight ranges.

The average consumer is an absolute moron and wouldn't be able to handle it. For medicines which are available over the counter it doesn't really matter, the dosing instructions are just so you don't give a 30 pound kid the full adult dose. For medicines where it does matter a pharmacist will write up specific instructions for an individual patient and directly advise them on how to take the drug.