September 16, 2014
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Drug Factsheets

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Dilantin

(phenytoin)

DIN (Drug Identification Number)

00022780 DILANTIN 100MG CAPSULE
00022772 DILANTIN 30MG CAPSULE
00023698 DILANTIN 50MG INFATAB
00023450 DILANTIN-125 125MG/5ML SUSPENSION
00023442 DILANTIN-30 30MG/5ML SUSPENSION

How does Dilantin work? What will it do for me?

Phenytoin belongs to the group of medications known as anti-epileptics. Phenytoin is used to manage and prevent certain types of seizures, as well as to prevent and treat seizures that occur during or following neurosurgery. It works on the brain to reduce the number and severity of seizures.

This medication may be available under multiple brand names and/or in several different forms. Any specific brand name of this medication may not be available in all of the forms or approved for all of the conditions discussed here. As well, some forms of this medication may not be used for all of the conditions discussed here.

Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.

Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.

How should I use Dilantin?

The recommended dose of phenytoin varies according to individual needs. The recommended starting dose for adults is 100 mg taken 3 times a day. Your doctor will then adjust the dose based on how well it works and is tolerated. The usual adult dose is 300 mg to 400 mg daily taken by mouth in divided doses or a single dose. An increase to 600 mg taken in divided doses may be needed in some cases.

The children's dose is based on age and body weight. The recommended starting dose is 5 mg per kilogram of body weight per day, which is then divided into 3 equal doses.

The level of phenytoin in your blood can be checked through laboratory testing. This test helps your doctor determine the dose of phenytoin that best suits you.

Phenytoin may be taken with or after meals. Do not use capsules that are discoloured.

Many things can affect the dose of a medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

Store all forms of this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.





What form(s) does Dilantin come in?

Capsules

30 mg
Each Coni-Snap white capsule with pink cap, imprinted "Parke-Davis" and "P-D 30" in black ink, contains 30 mg extended phenytoin sodium. Nonmedicinal ingredients: lactose, magnesium stearate, sugar, and talc; capsule shell: D&C Yellow No. 10, FD&C Red No. 3, gelatin, and titanium dioxide

100 mg
Each Coni-Snap white capsule with orange cap, imprinted "Parke-Davis" and "P-D 100" in black ink, contains 100 mg extended phenytoin sodium. Nonmedicinal ingredients: lactose, magnesium stearate, sugar, and talc; capsule shell: FD&C Yellow No. 6, gelatin, and titanium dioxide.

Dilantin Infatabs

Each flavoured, triangle shaped, grooved tablet contains 50 mg phenytoin (free acid form). Nonmedicinal ingredients: alcohol, magnesium stearate, spearmint oil, sugar, and talc.

Suspension

30 mg/5 mL
Each 5 mL of flavoured, red-coloured suspension contains phenytoin (free acid form) 30 mg. Nonmedicinal ingredients: alcohol, banana oil, citric acid, glycerin, magnesium aluminum silicate, orange oil, polysorbate 40, Red No. 2 FD&C, sodium benzoate, sodium carboxymethylcellulose, sugar, vanillin, and FD&C Yellow No. 6.

125 mg/5 mL
Each 5 mL of flavoured, orange-coloured suspension contains phenytoin (free acid form) 125 mg. Nonmedicinal ingredients: alcohol, banana oil, citric acid, glycerin, magnesium aluminum silicate, orange oil, polysorbate 40, sodium benzoate, sodium carboxymethylcellulose, sugar, vanillin, and FD&C Yellow No. 6.

Who should NOT take Dilantin?

Do not use phenytoin if you:

  • are allergic to phenytoin or any ingredients of the medication
  • are allergic to other medications in the class of medications called hydantoins (e.g., fosphenytoin)

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