I'd assume it was their telling them specifically not to get it from a foreign country that was the odd part, as opposed to simply prescribing it from a US phar

I'd assume it was their telling them specifically not to get it from a foreign country that was the odd part, as opposed to simply prescribing it from a US pharmacy since ofc that is what a US doctor will do. Maybe enough patients tried this, to save costs, that it resulted in some kind of issue for the doctor and that is why they brought it up.