Dilantin

(phenytoin)

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Treats and prevents seizures.

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Our bottom line

Dilantin (phenytoin) is very good at treating and preventing seizures, but it has many drug interactions and some serious side effects.

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    $45.96
Quick facts about Dilantin
  • Drug class: Neurology
  • Rx status: Prescription only
  • Generic status: Lower-cost generic available (phenytoin)

Upsides

  • If you have trouble swallowing pills, Dilantin (phenytoin) is available as a chewable tablet or a liquid.
  • Dilantin (phenytoin) is available in a cheaper, generic form.
Tried Dilantin? Write a review!

Downsides

  • Need to get regular blood tests while taking Dilantin (phenytoin) to make sure the medicine level is safe and effective in your body.
  • Can cause changes in your appearance, such as unwanted hair growth and enlargement of your gums.
  • If you have kidney problems, you’ll need regular blood tests to check your kidney function and to make sure Dilantin (phenytoin) levels in your blood don’t get too high.
  • Dilantin (phenytoin) can make other medications not work as well, including birth control.
How it works

Dilantin (phenytoin) is an antiepileptic medicine. It prevents seizures by lowering abnormal communication between cells in the brain.

Quick facts about Dilantin
  • Drug class: Neurology
  • Rx status: Prescription only
  • Generic status: Lower-cost generic available (phenytoin)

Dosage forms

  • Extended release
  • Chewable tablet
  • Liquid
Tried Dilantin? Write a review!

Prices and coupons

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What to expect when you take Dilantin (phenytoin) for Seizures

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  • First few hoursHours
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  • Effectiveness
  • Starts to kick in
    Full effects
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  • Possible side effects
  • Dizziness
  • Drowsiness
  • Worse coordination
  • Nervousness
  • Headache
  • Nausea
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Side effect rates for Dilantin (phenytoin)

Risks and Warnings for Dilantin (phenytoin)

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    • Higher risk if:
    • Asian ancestry

    Rarely, Dilantin (phenytoin) can cause severe, life-threatening skin reactions including toxic epidermal necrolysis (TEN) and Stevens-Johnson syndrome (SJS). If you notice a rash or any other skin changes while taking Dilantin (phenytoin), tell your doctor right away.

Common concerns from people taking Dilantin (phenytoin)

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Kidneys and liver
  • If you have kidney problems, you’ll need regular blood tests to check your kidney function and to make sure Dilantin (phenytoin) levels in your blood don’t get too high.