A 34-year-old woman comes to the clinic because of left ...

Phenytoin's effective level may be estimated by multiplying the patient's phenytoin level x 4.4 divided by serum albumin. Since many geriatric patients have low serum albumin levels (3 - 3.5 g/l) the effective dose of phenytoin in these patients is actually 25% to 50% higher than the reported levels. ................
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