Phenytoin

Also known as: Dilantin

Formal name: Phenytoin, total and free

At a Glance

Why Get Tested?

To determine phenytoin concentration in the blood, to maintain a therapeutic level, and to detect phenytoin toxicity

When to Get Tested?

At regular intervals to monitor, as needed to detect low or toxic concentrations

Sample Required?

A blood sample drawn from a vein in your arm

This article was last reviewed on November 26, 2006. | This page was last modified on November 6, 2009.

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