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 17 -
2005 15  2
2006 15 0
2007 17  2
2008 14  3
2009 14 0
Year Rank Change
2010 15  1
2011 15 0
2012 16  1
2013 17  1
2014 16  1

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)
Azithromycin (this drug) 31,988,786
Erythromycin 1,767,796
Clarithromycin 941,228

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
  • Azasite
  • Zithromax
  • Zmax
Generic Drug Synonyms and Salts
  • Azithromycin Anhydrous
  • Azithromycin Dihydrate
  • Azithromycin Monohydrate
  • Azithromycin, Unspecified Form
  • Azithromycin

FDA Approval Information

Established Pharmacologic Class (EPC): Macrolide Antimicrobial
Initial FDA approval date: 11/1/1991
First FDA applicant: Pfizer Chemicals Div Pfizer Inc
First dosage form: Capsule (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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Updated Mar 4, 2017
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