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Isosorbide mononitrate

Isosorbide mononitrate is an active ingredient of the class «vasodilator agent».

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Chemical compound

Informational only — not medical advice. Ask a doctor or pharmacist; never change a dose on your own.

What it is used for

Isosorbide Mononitrate Tablets are indicated for the prevention and treatment of angina pectoris due to coronary artery disease. The onset of action of oral isosorbide mononitrate is not sufficiently rapid for this product to be useful in aborting an acute anginal episode.

US label

How it works

Class: vasodilator agent

Common side effects

Headache is the most frequent side effect and was the cause of 2% of all dropouts from controlled-clinical trials. Headache decreased in incidence after the first few days of therapy.

US label

Who should not take it

Isosorbide mononitrate is contraindicated in patients who are allergic to it. Do not use isosorbide mononitrate in patients who are taking certain drugs for erectile dysfunction (phosphodiesterase inhibitors), such as sildenafil, tadalafil, or vardenafil.

US label

Pregnancy and breastfeeding

Teratogenic Effects Pregnancy Category B Reproduction studies performed in rats and rabbits at doses of up to 540 and 810 mg/kg/day, respectively, have revealed no evidence of harm to the fetus due to isosorbide mononitrate.

It is not known whether isosorbide mononitrate is excreted in human milk. Because many drugs are excreted in human milk, caution should be exercised when isosorbide mononitrate is administered to a nursing woman.

Excerpts from the US prescribing label (public domain), copied without changes.

Brand names

United States

Imdur · Ismo · Monoket

Canada

Apo-Ismn · Pms-Ismn · Pro-Ismn · Prz-Ismn · Riva-Ismn

Other trade names

Angeze 10 · Angeze 20 · Angeze 40 · Angeze sr 40 · Angeze sr 60 · Angitate · Astrodur mr · Carmil xl · Chemydur 60 xl · Cibral 10 · Cibral 20 · Cibral 40 · Cibral xl 60 · Dynamin · Dynamin xl 25 · Dynamin xl 50 · Elantan 10 · Elantan 20 · Elantan 40 · Elantan la 25

Approval status

US Food and Drug Administration
prescription · since 1991
Health Canada
prescription · marketed
First approval anywhere
1991

Codes

ATC
C01DA14
RxNorm CUI
28004
ChEMBL
CHEMBL1311
PubChem CID
27661
UNII
LX1OH63030
Wikidata
Q423401

Frequently asked questions

What is Isosorbide mononitrate used for?

Isosorbide mononitrate is used for: Cardiovascular disease, Coronary artery disease, and Angina pectoris.

What kind of medicine is Isosorbide mononitrate?

Isosorbide mononitrate is an active ingredient of the class «vasodilator agent».

What are the brand names of Isosorbide mononitrate?

Brand names of Isosorbide mononitrate include Imdur, Ismo, Monoket, Apo-Ismn, Pms-Ismn, Pro-Ismn, Prz-Ismn, and Riva-Ismn.

Medicines in the same class

Sources and licences

Updated November 15, 2026