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What fraction of your drug store purchases involve prescriptions? For me it's <10%.

Aspirin and fluoride toothpaste are each pretty darn effective.

Over here, even supermarket toothpaste has fluoride, so we don't go to the pharmacy for that.

Drug store is not the same as a pharmacy. (At least here in Germany). Of course you can get fluoride toothpaste in the supermarket as well though.