External use
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"For external use only", it says on many poisonous ointments and other medicinal products that should not be orally consumed. But, the naive patient might ask, external to what? Is it all right to eat the product if I step outside the building? This is another case of nerdview, you know. The person who draws a distinction between internal medicine and external medicine is the doctor, not you or me. If saving the patient from eating menthol crystals or drinking rubbing alcohol is what they have in mind, why on earth don't they simply say "Don't eat this", or "Not for drinking", or "Don't put this in your eyes or your mouth", or whatever they exactly mean? It is because (and I answer my own question here) they have not switched out of the doctor's-eye view and considered what things are like from the patient's perspective. That's nerdview.