What is Isosorbide Mononitrate ER 30?
“Isosorbide mononit er 30” usually refers to an extended-release (ER) formulation of isosorbide mononitrate, with a strength of 30 mg. Isosorbide mononitrate is a nitrate medicine used to prevent angina (chest pain) by relaxing and widening blood vessels.
What is it used for?
Extended-release isosorbide mononitrate tablets/capsules are typically prescribed to prevent angina attacks (prophylaxis). It is not usually used as a quick-relief medicine for sudden chest pain; that role is generally filled by fast-acting nitroglycerin products.
How is it taken (typical guidance)?
Because it’s extended-release, it’s generally important not to crush or chew the tablet unless the specific product instructions say it’s safe. Exact dosing instructions depend on the specific brand/generic and your clinician’s plan.
What side effects are common?
Common side effects of nitrates can include headache, dizziness, flushing, and lightheadedness, especially when starting or when the dose changes.
Who should not take it (key safety issue)?
A major safety concern is taking it with drugs for erectile dysfunction that contain sildenafil/tadalafil/vardenafil or similar medications, because the combination can cause dangerous low blood pressure. Also, it may be unsuitable in people with certain heart/blood pressure conditions—your prescriber should confirm it’s appropriate for you.
Where to check the exact product
If you share the full label text (including the manufacturer/brand name) or a photo of the “drug name + strength” line, I can help confirm exactly what “ER 30” corresponds to for that specific listing.