Preferred Name

Drugs containing the same active ingredient(s) are referred to by Preferred name – the international non-proprietary name (INN) in English for single ingredient drugs (or other approved name, if there is no INN). For multiple ingredient drugs, the Preferred name is the first reported drug name of a given combination.

N Single ingredient drug non-proprietary name
T Single ingredient drug proprietary name
K Single ingredient drug chemical name
R Single ingredient drug code number
M Multiple ingredient drug proprietary name
X Multiple ingredient drug non-proprietary name
U Non-specific name, from ATC texts (such as NSAID or benzodiazepine)