Dilantin: 7 to 10 days depending on body type and size but you should check with your doctor or medical professional. (Everyone is different) So what I am stating may not be true for you. Never stop taking a drug without consulting your doctor first.
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I've been taking Dilantin for 35 years, and now I had been tapering off. I have not passed out since then, & my doctor is wanting to take me off the Dilantin. I want to know, how long does it stay in your system.