|Test Code||MEXNE / MEX-M|
|Methodology||High-Pressure Liquid Chromatography (HPLC)|
|Description||Useful for assessing achievement of optimal therapeutic concentrations and for assessing potential toxicity|
Draw blood in plain, red-top tube(s) after patient has been receiving mexiletine for at least 3 days and just before administration of the next dose. (SERUM GEL TUBE IS NOT ACCEPTABLE.) Spin down and send 3.0 mL (minimum: 1.1 mL) of serum refrigerated.
|Reference Values||Theraputic concentration: 0.8 - 2.0 µg/mL (trough value)
Toxic concentration: > 2.0 µg/mL (trough value)
|Analytic Time||1 Day|
|Day(s) Test Set Up||Once a week|