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Drug Name Search

By Therapeutic Class

2021 Preferredone Primary


We cover both brand name drugs and generic drugs. Generic drugs have the same active-ingredient formula as a brand name drug. Generic drugs usually cost less than brand name drugs and are rated by the Food and Drug Administration (FDA) to be as safe and effective as brand name drugs. Brand name drugs may move to non-preferred status if a generic becomes available during the year.

What is a Formulary?

A formulary is a list of covered drugs which represents the prescription therapies believed to be a necessary part of a quality treatment program. We will generally cover the drugs listed in our formulary as long as the drug is medically necessary, the prescription is filled at a network pharmacy, and other plan rules are followed. For more information on how to fill your prescriptions, please review your Certificate of Coverage (COC) or Summary Plan Document (SPD).

Printable Files

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How to Search For Drugs

  • Use the alphabetical list to search by the first letter of your medication.
  • Search by typing part of the generic (chemical) and brand (trade) names.
  • Search by selecting the therapeutic class of the medication you are looking for.

Coverage for the drugs included on the 2021 PreferredOne Formulary is determined by your benefit plan design. It is important to note that this formulary is not a complete list of medications and not all listed drugs may be covered by your plan. Please also note that not all injectables are considered specialty medications and there may be exceptions where a medication may be covered based on benefit design and not by tier. Please refer to the benefit documents provided by your employer or health plan for information on your specific benefit coverage. You may also contact the PreferredOne Customer Service Department at 1-800-997-1750 or visit PreferredOne.com for more information.


  • T1
    - $0 Cost Share
  • T2
    - Preferred Insulins
  • T3
    - Generics
  • T4
    - Brands
  • T5
    - Preferred Specialty/Injectables
  • T6
    - Non-Preferred Specialty/Injectables
  • NF
    - Non-Formulary
† Denotes brand name drug, otherwise generic drug
Brand Names
generic names