Officinal

Officinal drugs, plants and herbs are those which are sold in a chemist or druggist shop.

Officinal medical preparations of such drugs are made in accordance with the prescriptions authorized by a pharmacopoeia.

It thus became applied to a shop where goods were sold rather than a place where things were made.

[1] Whereas official descends from officium, meaning office, as in duty or position.

In botanical nomenclature, the specific epithet officinalis derives from a plant's historical use in pharmacology.