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 14 -
2005 18  4
2006 17  1
2007 18  1
2008 21  3
2009 17  4
Year Rank Change
2010 14  3
2011 17  3
2012 26  9
2013 35  9
2014 35 0

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)
Warfarin (this drug) 23,420,139

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
  • Athrombin
  • Coumadin
  • Jantoven
  • Panwarfin
  • Athrombin-k
Generic Drug Synonyms and Salts
  • Warfarin Potassium
  • Warfarin Sodium
  • Warfarin

FDA Approval Information

Established Pharmacologic Class (EPC): Vitamin K Antagonist
Initial FDA approval date: Prior to January 1, 1982
First FDA applicant: Bristol Myers Squibb Pharma Co
First dosage form: Injectable (injection)

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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