LOINC Code 74948-1: FLUoxetine+Norfluoxetine trough [Mass/Vol]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Fluoxetine+Norfluoxetine^trough. It is commonly used with the system or sample type Ser/Plas.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• FLUoxetine+Norfluoxetine [Mass/volume] in Serum or Plasma --trough
• Fluoxetine+Norfluoxetine^trough
• Patient's sample is drawn at the expected trough (baseline) level of the parent drug (Fluoxetine).
• (S)-Norfluoxetine; Desmethylfluoxetine; DRUG/TOXICOLOGY; Drugs; Fluoxetine metabolite; Level; Mass concentration; Norfluoxetin; Pl; Plasma; Plsm; Point in time; Pre; Predose; Pre-dose; Prozac; QNT; Quan; Quant; Quantitative; Random; Seproxetine; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions