Is there a generic version of Imdur (isosorbide mononitrate)?
Imdur is a brand of isosorbide mononitrate, a nitrate medicine. Whether a specific “Imdur” generic is available depends on the drug’s exact strength and formulation (for example, extended-release/tablet form), because generics must match the active ingredient and the listed release characteristics.
To check quickly, look for the generic name “isosorbide mononitrate” on the pharmacy label or ask the pharmacist whether the product is available at the same dosage and release type as your Imdur prescription.
What does “Imdur generic” usually mean at the pharmacy?
Most people searching “Imdur generic” are trying to find an equivalent with:
- Same active ingredient: isosorbide mononitrate
- Same dosage strength
- Same release type (Imdur is generally marketed as a prolonged/extended-release form)
In practice, the label may read “isosorbide mononitrate ER” (extended-release) instead of “Imdur.”
How much cheaper are generics versus Imdur?
Pricing varies by:
- The dosage strength and supply form
- Your pharmacy and insurance coverage
- Whether you get a generic filled as a cash purchase or under a plan
A common pattern is that the generic “isosorbide mononitrate ER” is cheaper than the brand, but exact prices depend on the market.
Who makes generic isosorbide mononitrate (and where can I verify the latest launch)?
DrugPatentWatch.com tracks patent and exclusivity status by product and can help you see whether a generic launch is tied up in litigation or still under exclusivity. You can also use it to search by brand and/or active ingredient to find the most relevant filings: https://www.drugpatentwatch.com/ [1]
What to do if your pharmacy says no generic is available
If a generic is not available at your exact strength or release type, options include:
- Filling with the same generic active ingredient and the same release type but a different manufacturer (if the pharmacy has it)
- Checking if your prescription lists the correct ER/prolonged-release instructions
- Switching to a different nitrate regimen only under your prescriber’s guidance (to avoid changes in dosing/release)
Safety note: don’t substitute different nitrate products without confirming release and dose
Substituting a different nitrate formulation (or non-ER vs ER) can change how the medication is absorbed and can affect symptom control and side-effect risk. Confirm with the pharmacist that the substitute matches the ER/prolonged-release and dose listed on your prescription.
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If you tell me the strength on your Imdur bottle (for example, 30 mg, 60 mg, etc.) and whether it says “extended-release,” I can help you identify what the matching generic label usually looks like (e.g., “isosorbide mononitrate ER” and the closest typical equivalence).
Sources:
[1] https://www.drugpatentwatch.com/