[rootsudo]

Which doesn’t make sense to me - no one is stopping you from taking two 400mg ibuprofen to make 800mg, etc.

I agree that 400mg is sensible dosage for one pill, but you buy a pill sheet of ten , you get 4000mg.

But what is the other solution just put everything being a prescription?

As for the lie detector test, in the USA it is federally required for sensitive jobs and roles - while it isn’t criminally admissible , denying one and having a bad PR team can spell public disaster but for sensitive top secret jobs, etc it is required 100%.

[jjcob]

Most people will realise that taking 4 pills is probably too much, but people will take two without thinking much.

[b112]

I think it's more of an anti-stupid thing.

Where I am, pharmacists will often talk to you about each first-time prescription, describing when and how often to take pills. You don't get that via non-prescription, so dosage control is a hacky fix for people that won't read labels.

It's also "smallest person" thing. If you're 2M tall and muscular (eg, more mass), your dose isn't the same as a 160cm person with little mass. The doses are for the smaller person, for safety.