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Extended-release phenytoin capsules (Dilantin Kapseals) are available in two strengths:
  • Phenytoin 30 mg capsules
  • Phenytoin 100 mg capsules.
Additional strengths of extended-release phenytoin sodium capsules are available under a different name (made by a different company):
  • Phenytek® 100 mg capsules
  • Phenytek 200 mg capsules
  • Phenytek 300 mg capsules.
Chewable phenytoin tablets come in one strength (50 mg). Liquid phenytoin also comes in one strength: 125 mg per 5 mL (125 mg per teaspoonful).
Phenytoin injection is also available, although it is rarely used. In fact, it is used so rarely that the brand-name version of phenytoin injection is no longer being made (although generic versions are still available).

Is There a Generic Version of Phenytoin?

All phenytoin products are available in generic form (see Generic Dilantin).
Know the Signs - Concussion Safety

Phenytoin Sodium

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