Therapeutic range: When Dilantin is used for epilepsy, we try to keep patients within a range between 10 and 20. Below 10, you might still have some benefit, but as the level drops down to 5 or below, unlikely, that your meds will be very protective. Wise to stay in therapy window.
Answered 6/25/2014
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2 doctors weighed in across 2 answers
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