Phenytoin (Dilantin)
Fasting Required: No

Specimen: Blood

Patient Preparation: Collect as a trough just prior to next dose. For patients receiving fosphenytoin therapy, collect as a trough at least 2 hours after IV infusion or at least 4 hours after IM injection.

Results: Test run Mon-Fri; Report available in 2 business days

Description: Phenytoin is a drug that is used to treat some seizure disorders. These disorders affect the brain's ability to transmit electrical impulses and to regulate nerve activity. During a seizure, a patient may experience changes in consciousness, alterations in sight, smell, taste, and may experience uncontrolled muscular convulsions of one or more parts of the body. Phenytoin works by reducing the electrical conductance among brain cells, blocking excessive electrochemical activity occurring in the brain during a seizure.

Methodology: Immunoassay

Alternative Name(s): Dilantin®, Hydantoin

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.