RightSourceRx
Open container of generic drugs

Top 10 Generic Drugs

Generic medications account for 65 percent of all prescriptions written in the United States – which is nearly two billion prescriptions every year. Yet the dollars spent only represent 20.5 percent of the money spent on prescriptions. Clearly, generic equivalent medications help reduce the astronomical cost of medications.

Below you can review the top 10 generic drugs at RightSourceRx and in the U.S., as well as the top brand-name drugs that have generic equivalents.

RightSourceRxSM top 10 generic drugs

In 2007, the top 10 generic drugs filled by RightSourceRx were:

  • Metformin
  • Omeprazole
  • Simvastatin
  • Hydrochlorothiazide
  • Metoprolol Tartrate
  • Polyethylene Glycol powder
  • Atenolol
  • Lisinopril
  • Furosemide
  • Amlodipine Besylate

Top 10 generic drugs in the U.S.

In 2007, the top 10 generic drugs filled in the United States were:
  • Acetaminophen
  • Hydrocodone
  • Lisinopril
  • Levothyroxine
  • Amoxicillin
  • Metoprolol
  • Hydrochlorothiazide
  • Metformin
  • Azithromycin
  • Simvastatin
Source: IMS National Prescription Audit, National Sales Perspective, Nov. 2007

Top 50 prescribed brand-name drugs with a generic equivalent

Accupril Maxzide - 25 MG
Adipex-P Mobic
Allegra Neurontin
Amaryl Nitrostat
Armour Thyroid Oxycontin
Cefzil Paxil
Celexa Percocet
Climara Pravachol
Coumadin Proscar
Darvocet N-100 Prosac
Depo-Provera Sarafem
Diflucan Synthroid
Dilantin Tegretol
Dyazide Ultracet
Enulose Ultram
Estratest Urocit-K
Estratest H.S. Vicodin
Flexeril Vicodin ES
Flonase Wellbutrin SR
Glucophage Xanax
Glucophage XR Zaditor
Glucotrol XL Zithromax
Glucovance Zithromax Tri-Pak
Lanoxin Zocor
Lasix Zonegran

Compare the costs of these brand drugs and their generic equivalents with the Brand vs. Generic: Cost Comparison CalculatorTool on Humana.com.