Is the levels on dilantin tell about the kidneys ? if not what does levels mean ?

DILANTIN LEVELS: A Dilantin level is the amount of unbound Dilantin in your bloodstream. There is a certain optimal level that your doctor is trying to achieve. Also, if your Dilantin level is too high, it's a signal for your doctor to decrease your dose so you do not experience adverse effects. It is important to monitor your Dilantin level on a regular basis, but this is not to measure your kidney function.

Level in body: A Dilantin (phenytoin) level tells how much drug is in the body--a certain amount is needed to be effective. People excrete the drug at different levels and some medications can also change the excretion. The Dilantin level is used to adjust the dose.

Metabolism: There is a therapeutic level at which Dilantin is safely effective. This level is usually based on how your body metabolizes the medication.

Not really: However, with advanced kidney disease, the Dilantin therapeutic level should be lower to prevent toxic levels of free dilantin.