MONOTRATE OD 25MG

# Isosorbide Mononitrate 25 mg ## Short Description Isosorbide mononitrate 25 mg is a **prescription nitrate medicine** used mainly to prevent episodes of **angina (chest pain) caused by coronary artery disease**. It works by relaxing and widening blood vessels, reducing the workload on the heart and decreasing its oxygen demand. > **Important:** Isosorbide mononitrate formulations differ in whether they are immediate-release or extended-release. The correct dosing schedule depends on the specific product. ## Key Benefits * Helps prevent angina (chest pain) * Relaxes and widens blood vessels * Reduces the workload on the heart * Decreases the heart's oxygen requirement * Can improve exercise tolerance in people with chronic stable angina * Helps reduce the frequency of angina attacks when used regularly as prescribed ## Uses / Indications Isosorbide mononitrate may be prescribed for: * **Prevention of chronic stable angina** * Angina associated with coronary artery disease * Prevention of recurrent chest pain caused by reduced blood flow to the heart Isosorbide mononitrate is generally used for **prevention**, not for rapidly stopping an acute angina attack. ## How It Works Isosorbide mononitrate is an **organic nitrate**. It is converted to **nitric oxide (NO)** in the body. Nitric oxide activates pathways that relax vascular smooth muscle, causing blood vessels to widen. This reduces the amount of blood returning to the heart and lowers the heart's workload and oxygen demand, helping prevent angina. ## Dosage & Administration * Take Isosorbide Mononitrate 25 mg exactly as prescribed by your doctor * The appropriate dose depends on the formulation and your individual medical condition * Some formulations are designed for **once-daily dosing**, while other formulations may require a different schedule * Take the medicine at approximately the same time each day when prescribed regularly * Swallow extended-release tablets whole with water * Do not crush, chew or split modified-release tablets unless the product specifically allows it * It may be taken with or without food depending on the formulation * Do not change the dose without medical advice * Do not use an extra dose to treat sudden chest pain unless specifically instructed * If you miss a dose, follow the instructions provided with your specific product; do not double the next dose * Follow your doctor's instructions regarding a daily **nitrate-free interval**, when applicable, because continuous exposure can lead to tolerance ### Important For **sudden or acute angina**, isosorbide mononitrate is generally not the medicine used for immediate relief. Patients prescribed a fast-acting nitrate such as sublingual nitroglycerin should use it according to their doctor's instructions. ## Side Effects Common side effects may include: * Headache * Dizziness * Light-headedness * Flushing * Low blood pressure * Weakness * Nausea * Increased heart rate Headaches can be particularly common when starting nitrate treatment and may become less troublesome as the body adjusts. Serious effects may include: * Severe low blood pressure * Fainting * Rapid or irregular heartbeat * Severe allergic reaction Seek urgent medical attention for severe dizziness, fainting, difficulty breathing or signs of a serious allergic reaction. ## Precautions & Warnings * **Never use isosorbide mononitrate with sildenafil, tadalafil, vardenafil or other PDE-5 inhibitors** * Combining nitrates with PDE-5 inhibitors can cause a **dangerous and potentially life-threatening drop in blood pressure** * Avoid excessive alcohol because it may increase dizziness and low blood pressure * Tell your doctor if you have very low blood pressure * Inform your doctor if you have severe anemia * Tell your doctor if you have increased pressure inside the skull or a history of brain hemorrhage * Use caution if you are dehydrated * Rise slowly from sitting or lying down to reduce dizziness * Headaches are common and do not necessarily mean the medicine is harmful, but persistent or severe headaches should be discussed with your doctor * Do not stop prescribed nitrate treatment without medical advice * Tell your doctor if you are pregnant, planning pregnancy or breastfeeding * Keep out of reach of children ## Drug Interactions Important interactions include: * **Sildenafil, tadalafil, vardenafil and other PDE-5 inhibitors** — contraindicated because of the risk of severe hypotension * **Riociguat** — should not be combined with nitrates because of the risk of significant blood-pressure reduction * Other blood-pressure-lowering medicines — may increase dizziness and hypotension * Other nitrates — may increase nitrate-related effects * Alcohol — may increase dizziness and low blood pressure * Certain medicines that cause vasodilation — may further reduce blood pressure Tell your doctor or pharmacist about **all prescription medicines, OTC medicines, supplements and herbal products** you take. ## Storage Information * Store according to the manufacturer's instructions * Keep tablets in their original packaging * Protect from excessive heat, moisture and direct sunlight * Keep the container tightly closed * Store at the temperature specified on the product label * Keep out of reach and sight of children * Do not use after the expiry date ## Prescription Status Isosorbide mononitrate 25 mg is generally a **prescription-only medicine**. It should be used under the supervision of a qualified healthcare professional, particularly because of its effects on blood pressure and important drug interactions. ## Genuine Medicine Assurance * Purchase Isosorbide Mononitrate 25 mg only from a licensed and reputable pharmacy * Use it only against a valid prescription where required * Check the medicine name, strength and formulation * Verify the manufacturer, batch number and expiry date * Ensure the packaging and seal are intact * Confirm whether the product is immediate-release or modified-release * Do not use tablets from damaged or suspicious packaging * Purchase medicines from authorized sources * If you suspect the medicine is counterfeit, consult a pharmacist or the appropriate medicine regulatory authority ## Frequently Asked Questions ### What is Isosorbide Mononitrate 25 mg used for? Isosorbide mononitrate 25 mg is primarily used to **prevent angina (chest pain)** caused by coronary artery disease. ### Is Isosorbide Mononitrate a blood thinner? No. Isosorbide mononitrate is a **nitrate vasodilator**, not a blood thinner. It works by relaxing blood vessels. ### Does Isosorbide Mononitrate lower blood pressure? Yes. Because it widens blood vessels, isosorbide mononitrate can lower blood pressure. This is one reason dizziness and light-headedness may occur. ### Is Isosorbide Mononitrate used for chest pain? Yes, it is mainly used to **prevent recurring angina**. It is not generally intended to provide immediate relief from a sudden angina attack. ### Can Isosorbide Mononitrate stop a heart attack? No. It should not be relied upon to treat a suspected heart attack. If chest pain is sudden, severe, new or different from usual, seek emergency medical care immediately. ### Can I take Isosorbide Mononitrate with Nitroglycerin? Some patients may be prescribed both a long-acting nitrate such as isosorbide mononitrate and a fast-acting nitrate for breakthrough angina. Use them only according to your doctor's instructions. ### Can Isosorbide Mononitrate be taken with Sildenafil? **No.** Isosorbide mononitrate and sildenafil should not be used together. The combination can cause a dangerous fall in blood pressure. ### Can Isosorbide Mononitrate be taken with Tadalafil? No. Tadalafil and nitrates such as isosorbide mononitrate should not be combined because of the risk of severe hypotension. ### Why does Isosorbide Mononitrate cause headaches? Isosorbide mononitrate widens blood vessels, including blood vessels in the head. This can cause headaches, especially when treatment is first started. ### Can I stop Isosorbide Mononitrate suddenly? Do not stop regular treatment without speaking with your doctor. Stopping prescribed anti-anginal treatment may allow angina symptoms to return. ### Does Isosorbide Mononitrate cause dizziness? Yes. Dizziness and light-headedness can occur because the medicine may lower blood pressure. Rise slowly and avoid driving if you feel impaired. ### Can I drink alcohol while taking Isosorbide Mononitrate? Alcohol may increase the blood-pressure-lowering effects of isosorbide mononitrate and worsen dizziness or fainting. Avoid or limit alcohol according to your doctor's advice. ### How long does Isosorbide Mononitrate take to work? The onset depends on the formulation. Immediate-release preparations act more quickly, while extended-release products are designed to provide longer-lasting prevention of angina. ### How long does Isosorbide Mononitrate last? The duration depends on whether the medicine is immediate-release or modified-release. Follow the dosing schedule specified for your particular product. ### Can Isosorbide Mononitrate be taken with food? Many formulations can be taken with or without food, but instructions can vary between products. Follow the product label or your doctor's instructions. ### What should I do if I miss a dose? Follow the missed-dose instructions for your specific formulation. Generally, take the missed dose when remembered unless it is nearly time for the next dose. **Do not take a double dose.** ### Can Isosorbide Mononitrate cause low blood pressure? Yes. Low blood pressure is a known effect and can cause dizziness, weakness or fainting. ### Can Isosorbide Mononitrate be used during pregnancy? Tell your doctor if you are pregnant or planning pregnancy. Your doctor will determine whether the potential benefits outweigh any possible risks. ### Can Isosorbide Mononitrate be used while breastfeeding? Consult your doctor before using isosorbide mononitrate while breastfeeding because the safety information may depend on the individual situation. ### Is Isosorbide Mononitrate a nitrate? Yes. It belongs to the **organic nitrate** group of medicines. ### What is the difference between Isosorbide Mononitrate and Isosorbide Dinitrate? Both are nitrate medicines used for cardiovascular conditions, but they have different chemical structures and dosing characteristics. They should not be substituted for one another without medical advice. ### Can Isosorbide Mononitrate be used for high blood pressure? Its primary use is prevention of angina rather than routine treatment of hypertension. Its blood-pressure-lowering effect is generally considered part of its vasodilator action. ### Can Isosorbide Mononitrate cure angina? It does not cure the underlying coronary artery disease. It helps **prevent and control angina symptoms** when used as prescribed. ### What happens if I take too much Isosorbide Mononitrate? An overdose can cause severe headache, dizziness, very low blood pressure, rapid heartbeat, fainting and potentially life-threatening complications. Seek emergency medical attention if an overdose is suspected. ## Medical Disclaimer This information is provided for general educational and SEO purposes only and is not a substitute for professional medical advice, diagnosis or treatment. **Isosorbide mononitrate 25 mg is a prescription cardiovascular medicine and should be taken only as directed by a qualified healthcare professional.** The correct dose depends on the specific formulation and individual patient factors. Never combine nitrates with PDE-5 inhibitors such as sildenafil or tadalafil because this can cause a dangerous drop in blood pressure. Isosorbide mononitrate is generally intended to prevent angina rather than treat sudden chest pain. Seek emergency medical attention for new, severe or persistent chest pain, fainting, severe breathing difficulty or suspected overdose.