Indications
- Isosorbide mononitrate prevents chest pain (angina) in patients with coronary artery disease.
- Belongs to the drug class known as nitrates.
- Works by relaxing and widening blood vessels to facilitate easier blood flow to the heart.
- Does not relieve chest pain once it occurs.
- Not intended for use just before physical activities (e.g., exercise or sexual intercourse) to prevent chest pain.
- Other medications may be prescribed by the doctor for such conditions; consult for more details.
Dosage and administration
- Take the medication orally once daily in the morning as directed by the doctor.
- Swallow the whole tablet with a half glass of water, unless otherwise instructed by your doctor.
- Do not crush or chew the medication, and only split the tablets if they have a score line and your doctor or pharmacist advises.
- Use the medication regularly at the same time each day for maximum benefits.
- Do not stop taking the medication without consulting your doctor, as some conditions may worsen if abruptly stopped; the dose may need gradual reduction.
- If used for an extended period, there is a slight possibility that the medication may not work as effectively; inform your doctor if chest pain becomes more frequent or worsens.
Side effects
- Possible side effects of the medication include headache, dizziness, lightheadedness, nausea, and flushing, which may occur during the adjustment period.
- Inform your doctor or pharmacist promptly if these effects persist or worsen.
- Headache may be a sign that the medication is working; over-the-counter pain relievers like acetaminophen or aspirin can be recommended by your doctor. Notify your doctor if headaches persist or become severe.
- To minimize dizziness and lightheadedness, rise slowly from a sitting or lying position.
- Finding an empty tablet shell in stool is harmless as the medication has already been absorbed by the body.
- The medication is prescribed considering the greater benefit compared to the risk of side effects; many users do not experience serious side effects.
- Seek immediate medical attention for serious side effects like fainting or fast/irregular/pounding heartbeat.
- A rare but serious allergic reaction may occur; get medical help immediately for symptoms such as rash, itching/swelling, severe dizziness, or trouble breathing.
- Not a complete list of possible side effects; contact your doctor or pharmacist for other observed effects.
Precautions
- Inform your doctor or pharmacist about any allergies to the medication or similar drugs.
- Disclose your medical history, particularly low blood pressure.
- The medication may cause dizziness; avoid activities requiring alertness until you can do them safely.
- Limit alcohol consumption and discuss marijuana use with your doctor.
- Inform your doctor or dentist about all products in use before surgery.
- Older adults may be more sensitive to side effects, increasing the risk of falls.
- Use the medication during pregnancy only when necessary; discuss risks and benefits with your doctor.
- Consult your doctor before breastfeeding, as it is uncertain whether the medication passes into breast milk.