Does "rural" equate to "stupid" and "illiterate" in your mind? It's on the packaging, among other sources of information they have access to.
This is how every medicine works.
A typical 500mg adult dosage tablet isn't recommended til the child is > 72lbs.
They make smaller tablets. Smaller tablets can also be cut up. And there's liquid preparations that can be tuned to whatever level is needed.
The dosage in children’s Tylenol is much smaller than that—you don’t get a dosage near that size until kids are around 11.
Or don't give kids things that are meant for adults
The typical dose is not 500mg for small children. For instance see https://www2.hse.ie/medicines/paracetamol-for-children/how-a...
> If your baby is age 2 to 3 months, give them 2.5ml of [a specified] syrup. A 2.5ml dose contains 60mg of paracetamol.
Doesn't sound super safe for kids who have small livers given the typical dose is 500mg to be honest.