eli5: Why do some pills come loose in a bottle like Tylenol, while others are in separate pouches?

Question

Why do some pills, like Tylenol, come in a loose form inside a bottle, while others are individually packaged in separate pouches?

Is this because some pills are more abused/misused? Does size play a factor? Small Pill = Different packaging.

In: 147

Answer 1

I think gels come in blister packs. I recall hearing that they were invented in response to a series of random poisonings in which someone had been injecting poison via syringe. The foil blister packs would show a visible hole from tampering.