imdur
Imdur (Isosorbide Mononitrate) is a nitrate vasodilator used to treat Angina Pectoris, Coronary Disease, Cyanosis, Gastroesophageal Reflux.
Isosorbide Mononitrate · by Schering Plough
Available as a generic: Isosorbide Mononitrate
Key facts
- Active ingredient
- Isosorbide Mononitrate
- Drug class
- Nitrate Vasodilator
- Form
- Tablet, extended release
- Strength
- Isosorbide Mononitrate 120MG **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons** · Isosorbide Mononitrate 30MG **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons** · Isosorbide Mononitrate 60MG **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons**
- Type
- Prescription (Rx)
- Brand or generic
- Brand-name
- May treat
- angina pectoris, coronary disease, cyanosis
- Manufacturer
- Schering Plough
- FDA application
- NDA020225
- Availability
- Discontinued (per FDA)
Drug class
How this class works, per Nitrates - StatPearls - NCBI Bookshelf.
May treat (source: NIH RxClass)
See how Imdur ranks — best-rated nitrate vasodilator for:
Dosage forms
Tablet, extended release
The forms currently marketed in the U.S., per the FDA National Drug Code Directory.
Ways to save
Ask for the generic
Same active ingredient, far cheaper. Is there a generic? →
Request a 90-day supply
Bulk fills usually lower the per-dose price vs monthly refills.
Use copay cards
Manufacturer copay cards & patient-assistance programs — especially for brand drugs.
Compare alternatives
A same-class option may cost less. See alternatives →
Frequently asked questions
- What does Imdur treat?
- Imdur (Isosorbide Mononitrate) may be used to treat angina pectoris, coronary disease, cyanosis, gastroesophageal reflux, heart failure, poisoning, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
- How does Imdur work?
- Imdur is a nitrate vasodilator. Nitrate vasodilators are converted in the body into nitric oxide, which relaxes the smooth muscle in blood vessel walls and widens them. This mainly opens up the veins, reducing how hard the heart must work and relieving chest pain.
- Is there a coupon or discount for Imdur?
- pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Imdur. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
- Who makes Imdur?
- Imdur is marketed by Schering Plough. You can see Schering Plough's full profile, rating, and other products on pharmaranks.
- Is Imdur a brand-name or generic drug?
- Imdur is a brand-name product with the active ingredient Isosorbide Mononitrate. Lower-cost generic equivalents containing Isosorbide Mononitrate are available — ask your pharmacist.
- Is Imdur available over the counter?
- No. Imdur is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
- What forms does Imdur come in?
- Imdur is currently marketed as tablet, extended release, per the FDA's National Drug Code Directory.
- What class of drug is Imdur?
- Imdur is classified as nitrate vasodilator, per the FDA's Established Pharmacologic Class.
- Is Imdur FDA-registered?
- Imdur is on record with the U.S. FDA under application number NDA020225. You can verify this on its official FDA label.
Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.
What people report to the FDA about ISOSORBIDE MONONITRATE
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 22,022 reports naming ISOSORBIDE MONONITRATE — the active ingredient in Imdur, and the FDA flagged 84% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- dyspnoea1,644 reports
- dizziness1,551 reports
- fatigue1,383 reports
- diarrhoea1,381 reports
- nausea1,353 reports
- chest pain1,276 reports
- headache1,137 reports
- myocardial infarction1,109 reports
Read these as a signal, not a rate. A report does not mean ISOSORBIDE MONONITRATE caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
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