Phenytoin

Drug Usage Statistics, United States, 2008 - 2018

Phenytoin Summary for 2018

Estimated number of prescriptions in the United States 1,643,497
Top drug rank #269 ( 48)
Average total drug cost $82.95 (USD)
Average out-of-pocket cost $23.43 (USD)

Number of Prescriptions Over Time (2008 - 2018)

Rank of Top Drugs Over Time

"Rank" refers to the frequency that a given medication is prescribed within a calendar year compared to all other medications. A rank of "4" would indicate that the medication was the fourth most commonly prescribed medication.

Year Rank Change
2008 145  21
2009 130  15
2010 139  9
2011 179  40
2012 138  41
2013 131  7
Year Rank Change
2014 156  25
2015 158  2
2016 201  43
2017 221  20
2018 269  48

Drug Cost Over Time (2008 - 2018)

  • Total cost: The average total cost of the medication including the out-of-pocket cost (see below) plus the amount paid by other parties (Medicare, Medicaid, private insurance, Veterans Administration, TRICARE, other state/federal sources, Worker's compensation, and other miscellaneous sources)
  • Out-of-pocket cost: The average payment made by the patient which may include deductibles, coinsurance, copayments, or the cash price paid without insurance coverage.

Related Drugs

Drug Name Total Prescriptions (2018)
Gabapentin 45,586,654
Lamotrigine 11,582,775
Divalproex Sodium 5,275,298
Oxcarbazepine 3,915,509
Phenytoin (this drug) 1,643,498
Primidone 1,437,305

Drug Synonyms

Drug synonyms are used during the sanitation and standardization process of "cleaning" the original data source (MEPS). Occassionally, brand names may be listed below that are no longer on the market or are very infrequently used.

Brand Name Synonyms
  • Dilantin
  • Dilantin-125
  • Dilantin-30
  • Diphenylan Sodium
  • Extended Phenytoin Sodium
  • Phenytek
  • Phenytex
  • Prompt Phenytoin Sodium
Generic Drug Synonyms and Salts
  • Phenytoin Sodium
  • Phenytoin

FDA Approval Information

Established Pharmacologic Class (EPC): Anti-epileptic Agent
Initial FDA approval date: Prior to January 1, 1982
First FDA applicant: Discn
First dosage form: Suspension (oral)

Prescription data source: Medical Expenditure Panel Survey (MEPS) 2008-2018. Agency for Healthcare Research and Quality (AHRQ), Rockville, MD. ClinCalc DrugStats Database version 21.1. Read more about the ClinCalc DrugStats database.

All ClinCalc DrugStats figures and graphs on this page are licensed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).

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Updated Jan 18, 2021
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