Short answer
In US FDA prescription-drug terminology, an approved generic matches its brand-name counterpart in specified characteristics and demonstrates bioequivalence; it need not have an identical formulation. An authorized generic is different: it is the brand-name drug marketed without the brand name under the same approval. A branded product does not necessarily have an ANDA-approved generic counterpart. 1 2
On this page
At a glance
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| Attribute | Generic drug | Brand-name drug |
|---|---|---|
| Approval relationship | Conventional generic uses an ANDA referencing a previously approved drug | Provides the prior approval relied on by the generic |
| Active ingredient | Same as its brand-name counterpart | Ingredient the counterpart must match |
| Inactive ingredients | May differ | Formulation need not be copied exactly |
| Naming exception | Authorized generic uses the brand’s NDA, not an ANDA | Same drug may also be marketed without its brand name |
These distinctions concern FDA approval, not product rankings. 1 2
What each thing is
The conventional generic is a separately approved counterpart, not merely a medicine with a less recognizable name. FDA requires matching active ingredient, strength, dosage form, route, and conditions of use, with certain permitted labeling differences. The brand-name drug supplies the prior safety and effectiveness finding on which the ANDA relies. 2
Key differences
The central difference is the approval relationship, not a lower quality standard. A conventional generic applicant demonstrates the required similarities and bioequivalence without independently establishing safety and effectiveness anew. FDA describes bioequivalence as reaching the site of action at the same time and in the same amount. Minor formulation differences, including inactive ingredients, remain possible. 2
How to tell them apart
Use the documented approval relationship rather than appearance alone: an ANDA identifies the conventional generic pathway; marketing under the brand-name drug’s NDA identifies an authorized generic. The limit is that a missing brand name, different color, or different marking cannot by itself distinguish those two categories. Authorized generic tablets or capsules may also look different. 2
Where they overlap
FDA-approved generics and their brand-name counterparts share clinical benefits and risks, and both are subject to FDA quality oversight. The distinction therefore does not divide medicines into effective and ineffective categories. It separates approval and marketing relationships while allowing specified differences. 1
Edge cases
An authorized generic can exist even when the brand-name product has no approved ANDA counterparts. FDA considers it therapeutically equivalent because it is the same drug, and it is not separately listed in the Orange Book. Consequently, “no ANDA generic” does not necessarily mean “no authorized generic.” 2
Why the distinction exists
The ANDA pathway builds on FDA’s previous evaluation rather than duplicating the brand-name drug’s safety and effectiveness evidence. That generally reduces approval costs. Separately, patents and marketing exclusivity can affect when a conventional generic receives final approval or enters the market; matching the drug scientifically is not the only consideration. 1 2
Common misconceptions
“Generic” does not mean every ingredient is identical, and “brand-name” does not guarantee an available generic counterpart. Nor does a generic-looking label establish a separate generic approval: an authorized generic uses the brand’s existing approval. These FDA distinctions do not, by themselves, establish state pharmacy substitution rules. 1 2
Examples
- Hypothetical: a tablet approved through an ANDA matches the brand’s active ingredient and strength but uses a different inactive ingredient. That difference alone does not rule out generic status.
- Hypothetical: the brand’s drug is sold without its brand name under the same NDA. It is an authorized generic, not a separately ANDA-approved counterpart. 2