Phenytoin

Drug Usage Statistics, United States, 2004 - 2014

Number of Prescriptions Over Time (2004 - 2014)

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
2004 85 -
2005 96  11
2006 110  14
2007 124  14
2008 145  21
2009 129  16
Year Rank Change
2010 139  10
2011 179  40
2012 138  41
2013 131  7
2014 156  25

Patient Out-Of-Pocket Cost Over Time (2004 - 2014)

"Out-of-pocket" cost refers to the payment made by the patient (either cash price or the copay amount). This value does not include reimbursement from a third party payer (eg, Medicare or private insurance) and does not represent the total drug cost.

Usage Statistics of Related Drugs

Drug Name Total Prescriptions (2014)
Gabapentin 39,361,473
Lamotrigine 12,705,157
Divalproex Sodium 7,299,035
Phenytoin (this drug) 4,310,314
Oxcarbazepine 4,148,661
Primidone 972,817

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: Parke Davis Div Warner Lambert Co
First dosage form: Suspension (oral)

Prescription data source: Medical Expenditure Panel Survey (MEPS) 2004-2014. Agency for Healthcare Research and Quality (AHRQ), Rockville, MD. ClinCalc DrugStats Database version 17.0. Read more about the ClinCalc DrugStats database.

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Which of these drugs causes acute kidney injury? The Top 250 Drugs by ClinCalc Academy
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Updated Mar 4, 2017
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