In Japan, you get your prescription written by a doctor and it is filled at a pharmacy, just like in the United States. However, in addition to prescription one has a booklet in which all medicines are recorded by the pharmacist. It’s called a “Kusuri Techyo.”
That way the pharmacist can always see what medicines you have already been prescribed and make sure none of them clash.
At my local pharmacist, I took a photo of this sign.
On the left you can see the “Shohousen” (prescription) holding hands with the “Okusuritechyo” (Medicine Booklet). They are saying: “Issyo ni dashite ne.” (“Hand us in together.”)