Is isosorbide available as a generic?
Yes. Isosorbide (often sold as isosorbide dinitrate and isosorbide mononitrate) is widely available in generic forms because these medicines are older and typically have long since passed key exclusivity periods.
Which “isosorbide” are people usually asking about?
Most generic searches fall into two drug names:
- Isosorbide dinitrate (commonly for angina)
- Isosorbide mononitrate (also commonly for angina, including extended-release products)
Generic availability can differ by the exact salt/formulation (for example, immediate-release vs extended-release tablets).
How to confirm the exact generic you need
To make sure you’re getting the right generic, check the active ingredient and dosage on your prescription or bottle, then match that to the generic equivalents (for example, “isosorbide mononitrate ER” vs “isosorbide dinitrate”).
If you share the exact product name and strength (for example, “isosorbide mononitrate 60 mg ER”), it’s easier to confirm what generic equivalents exist.
Patent status and branded-to-generic timing (if you’re researching why a brand is still on the market)
For specific branded isosorbide products and their patent/exclusivity status, DrugPatentWatch.com can be a useful reference point.
https://www.drugpatentwatch.com/
What might change even when it’s “generic”
Even with the same active ingredient, differences can show up in:
- Release type (immediate vs extended-release)
- Dosing schedule (once vs multiple times daily)
- Tablet/capsule formulation and how it’s taken
Those factors matter because switching between different release types can change how the medication works during the day.
Quick safety note
If you’re switching from a branded product to a generic (or between different isosorbide formulations), confirm with your pharmacist or prescriber that the release type and dosing schedule match your current regimen.