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. 2022 May 23;14(5):e25251. doi: 10.7759/cureus.25251

Table 1. Serum levels of phenytoin.

The progressive downtrend of serum phenytoin levels after being discontinued.

  Hospital Day 1 Hospital Day 2 Hospital Day 3 Hospital Day 4
Phenytoin level (microgram/mL) 44.1 33.3 28.3 18.7