What 'generic' actually means
A generic medicine is not an imitation. To be approved in the US it must contain the same active ingredient at the same strength in the same dosage form, and it must demonstrate bioequivalence — that the rate and extent of absorption fall within a defined range of the reference product in human testing.
Generic manufacturers are inspected to the same manufacturing standards as brand manufacturers. What can differ is the inactive ingredients — fillers, binders, dyes — and therefore the size, shape and colour of the tablet.
When paying for the brand is defensible
- A documented allergy or sensitivity to an inactive ingredient in the available generics.
- An unexplained, reproducible difference in your own response that you and your clinician have specifically identified.
- An insurance plan that, unusually, makes the brand cheaper for you than the generic.
Outside those situations, paying brand prices is buying the packaging. Where a real difference in response exists, it is more often explained by dose, timing, food or expectation than by the manufacturer.
Where the real risk is
The meaningful quality distinction is not brand versus generic. It is regulated versus unregulated.
Frequently asked questions
Is generic sildenafil as effective as Viagra?
Why do my generic tablets look different from last time?
Are generics from other countries the same?
Why is brand-name Viagra still so expensive?
What this is based on
We link to primary sources — clinical guidelines, regulator publications and peer-reviewed research — wherever possible. Links open on third-party sites we do not control.
- [01]U.S. Food and Drug Administration. Drugs@FDA — approved drug products and prescribing information.
- [02]U.S. Food and Drug Administration. Counterfeit Medicine.
- [03]MedlinePlus (National Library of Medicine). Drugs, Herbs and Supplements.