Test Code PTN Phenytoin (Dilantin), Total, Plasma
Used for therapeutic drug monitoring. Phenytoin is the most widely used anticonvulsant. It is effective against grand mal and the generalized spread of seizures with focal origin.
St. Mary's Regional Medical Center-Chemistry
Container/Tube: Light green-top (lithium heparin) tube
Specimen: 1 mL of lithium heparin
Transport Temperature: Ambient
Collection Instructions: Draw specimen just prior to administration of next dose for therapeutic response.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Therapeutic concentration: 10-20 mcg/mL
Potentially toxic concentration: >30 mcg/mL
Call criteria (automatic call-back): >25 mcg/mL
Day(s) Test Set Up
Monday through Sunday