IPA: /ˌfɑːrməˈkoʊpiə/
KK: /fɑrˌmækəˈpiə/
A book that lists official medicinal drugs and provides information about how they are made and used.
The pharmacist referred to the pharmacopoeia to check the correct dosage of the medication.
Pharmacopoeia → It is formed from "pharmakon" (meaning drug or medicine) and "poiein" (meaning to make). The word refers to a book or manual that contains a list of medicinal drugs and their effects, essentially meaning a collection of made medicines.
Think of 'pharmakon' as relating to drugs and 'poiein' as making — this helps you remember that a pharmacopoeia is a book that makes or lists medicines.
No commonly confused words.