This main class has been divided into canonical classes: LZ3 Pharmacology, LZ5 Pharmacopoeia, LZ8 Pharmacy. LZ3 in this [P] is the substance, isolates in this facet are the same as enumerated in [P] in the main class E Chemistry. [E] is the action of the drug. [2P] is the body organ on which the drug action takes place which is to be got by (SD). LZ5 in this [P] is the nation isolate that stands for the country which is to be got by (GD). [P2] is the kind or order isolate in this facet are enumerated such as official, secondary and tertiary.