Vasotrate

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Vasotrate

Property Description
Active ingredient Isosorbide Mononitrate (ISMN)
Form Tablet (Standard and Extended-release)
Pharmacological class Organic Nitrate, Vasodilator
General purpose Supports heart function by reducing cardiac workload
Origin Synthetic organic compound

1. Vasotrate: Defining the Organic Nitrate and Active Ingredient

Vasotrate is a medication primarily defined by its active ingredient, Isosorbide Mononitrate (ISMN), which is clinically recognized and categorized as an organic nitrate and vasodilator. This compound is a synthetic organic compound and is consistently administered as a single-ingredient product, chemically designed for cardiovascular application.

Isosorbide Mononitrate is already in its active metabolic form, a characteristic that differentiates it from older nitrates requiring initial processing by the liver to exert their full effect. This agent belongs to the group of medicines called nitrates, which are used for individuals experiencing reduced myocardial blood flow. The classification as an organic nitrate signifies its inherent ability to cause vascular relaxation by releasing Nitric Oxide (NO) within the body.


2. Type, Form, and General Purpose of Isosorbide Mononitrate

Isosorbide Mononitrate is available as solid oral pharmaceutical preparations, typically in the form of a standard tablet or an Extended-release tablet, and is always administered via the oral route. The brand Vasotrate represents one such preparation, containing the specific ISMN formulation.

Its fundamental physiological action is to facilitate vascular relaxation, which is the core mechanism principle that defines its general therapeutic purpose. By causing the muscular walls of blood vessels to widen, the medicine effectively reduces the overall strain and cardiac workload on the heart. This application is utilized in managing conditions related to reduced blood flow to the heart. The availability of both the standard and Extended-release tablet forms is a key distinguishing factor, as the latter utilizes specialized formulation design to maintain a stable, prolonged effect, which is particularly beneficial for consistent, long-term support.

Regulatory References

  1. Isosorbide - StatPearls - NIH

What side effects are possible with Vasotrate?

Vasotrate, a nitrate vasodilator, is associated with a specific profile of adverse reactions, primarily due to its blood vessel-dilating action.

Common Side Effects

The most frequent adverse reactions reported in clinical data include Headache and Dizziness (especially upon standing, known as orthostatic hypotension). Other common effects may include flushing (warmth or redness) and nausea.

Headaches, in particular, are often a transient effect that may decrease in incidence and severity with continued therapy. Patients should be aware that headaches may be a marker of the drug's activity and should not abruptly discontinue use to avoid them.

Serious Adverse Reactions and Restrictions

  • Severe Hypotension (profound drop in blood pressure) is a serious risk. Vasotrate is contraindicated in patients with pre-existing low blood pressure (hypotension) or those who are volume-depleted.
  • Absolute Contraindication: The drug is strictly forbidden for use with Phosphodiesterase-5 (PDE-5) inhibitors (e.g., sildenafil, tadalafil) or soluble guanylate cyclase stimulators (e.g., riociguat) due to the risk of life-threatening, uncontrolled hypotension, syncope, and myocardial ischemia.
  • Other Serious Events: Less commonly reported serious events include syncope (fainting), worsening angina (paradoxical increase in chest pain), and methemoglobinemia (indicated by bluish or pale skin color, a condition that impairs oxygen transport).

Population-Specific Safety Considerations

Caution is advised for specific populations, including the elderly (who may be more sensitive to hypotensive effects) and patients with hypertrophic cardiomyopathy (a heart muscle disease) as Vasotrate may aggravate outflow obstruction. Use during pregnancy or lactation should only occur if the potential benefit justifies the potential risk, as adequate data on human use are limited and it is not known if the drug is excreted in human milk. Patients must also avoid abrupt cessation of therapy, as this may lead to withdrawal symptoms or a severe recurrence of their underlying condition.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for a Vasotrate (Isosorbide Mononitrate) overdose is defined by the consequences of severe vasodilation. Regulators mandate that individuals seek emergency medical attention immediately for any suspected overdose. The most commonly documented clinical manifestations include marked hypotension (severe low blood pressure), tachycardia (fast heart rate), persistent throbbing headache, vertigo, and syncope (fainting), which can progress to circulatory failure.

Severe Outcomes and Management

Official documents note that severe outcomes may include cardiovascular collapse and the rare development of methaemoglobinaemia, a condition characterized by cyanosis and hypoxaemia. Other severe manifestations listed are a significant rise in intracranial pressure and cerebral convulsions.

Management procedures described in official labeling are symptomatic and supportive. The primary goal is to correct hypotension, often by passive elevation of the patient's legs and expanding the intravascular volume using intravenous fluid infusion. For methaemoglobinaemia, the specific intervention described is the intravenous administration of Methylene blue.

Patients require continuous monitoring of blood pressure and pulse and observation for at least 12 hours post-overdose. Fluid expansion must be managed cautiously in high-risk patients with renal disease or congestive heart failure.

Therapeutic Uses of Vasotrate

What Vasotrate Treats: Main Uses and Benefits

Vasotrate (Isosorbide Mononitrate) is a nitrate drug that is generally applied across therapeutic domains where additional symptomatic support is needed in contexts involving heightened systemic burden. The medication is commonly used for managing and preventing the symptoms associated with angina pectoris (chest pain) in individuals with coronary artery disease.

This therapy is considered relevant for easing the symptoms related to physical discomfort and conditions involving episodic or fluctuating manifestations. This assists patients in coping more steadily with symptom fluctuations, providing support during difficult episodes. The uses relate to managing conditions characterized by periods of heightened symptoms and conditions where functional stability becomes affected.

Quick Fact: Supports comfort during Physical Discomfort

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Vasotrate (isosorbide mononitrate) is approved for use in adults for the prevention of angina pectoris. Its use is limited in several populations, primarily due to the risk of severe hypotension (low blood pressure).


Contraindicated Populations (Must Not Use)

Use of Vasotrate is contraindicated and must be avoided in individuals with:

  • A known allergy or hypersensitivity to any nitrate medication (e.g., isosorbide mononitrate, isosorbide dinitrate, nitroglycerin) or any component of the formulation.
  • Concomitant use of phosphodiesterase type-5 (PDE-5) inhibitors (e.g., sildenafil, tadalafil, vardenafil) or the soluble guanylate cyclase stimulator riociguat. Combining these drugs can cause a profound, life-threatening drop in blood pressure.
  • Acute circulatory collapse (shock) or very low blood pressure (e.g., systolic BP le 90 mmHg).
  • Certain severe heart conditions, such as cardiogenic shock or constrictive pericarditis.

Restricted or Cautioned Use

Special consideration or caution is required for patients with:

  • Severe anemia or hypovolemia (low blood volume).
  • Recent myocardial infarction (heart attack).
  • Conditions where low blood pressure is risky, such as hypertrophic cardiomyopathy or increased intracranial pressure.
  • Severe liver or renal impairment.

Age and Physiological Status

  • Pediatric Use: Safety and effectiveness have not been established; use is generally not recommended in children and adolescents under 18.
  • Pregnancy/Lactation: Use is not recommended unless the potential benefit justifies the potential risk, as safety and efficacy in these populations have not been established by regulatory bodies.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Vasotrate (Isosorbide Mononitrate) is defined primarily by its potential for additive pharmacodynamic effects, rather than metabolic or clearance changes. Official regulatory documents establish specific restrictions and classifications for co-administered substances.

Contraindicated Combinations

Co-administration with two specific classes of medicines is formally prohibited due to the documented risk of severe, life-threatening hypotension:

  • Phosphodiesterase-5 (PDE-5) Inhibitors (e.g., Sildenafil, Tadalafil)
  • Soluble Guanylate Cyclase (sGC) Stimulators (e.g., Riociguat)

Additive Hypotensive Risk

Caution is warranted when Vasotrate is used with other agents that lower blood pressure, as this can result in documented additive hypotensive effects. This category includes:

  • Other Vasodilators and Antihypertensive agents (e.g., ACE Inhibitors, Beta-Blockers, Calcium Channel Blockers, Diuretics).
  • Alcohol consumption should be avoided, as it can potentiate the hypotensive effect, which may lead to syncope.

Pharmacokinetic and Timing Relevance

Regulatory documentation does not list significant exposure-altering interactions via CYP enzymes or transporters. Consequently, there are no mandatory timing separation rules documented in the official labeling for co-administered medicines.

Mechanism of Action

Activation of the Nitric Oxide-cGMP Pathway

Vasotrate (Isosorbide Mononitrate) acts as a prodrug that releases the gaseous signaling molecule Nitric Oxide (NO) upon enzymatic bioreduction within vascular cells. The NO then activates the enzyme Soluble Guanylate Cyclase (sGC), triggering a critical cascade that leads to a surge in the second messenger cGMP. This molecular action targets the vascular tone regulation pathway, which initiates the relaxation of the smooth muscle.


Modulation of Hemodynamics and Cardiac Workload

The cellular relaxation caused by the cGMP pathway manifests as widespread vasodilation, primarily affecting the venous capacity vessels. This pooling of blood in the periphery causes a reduction in the volume returning to the heart (preload). Simultaneously, dilation of the arterial vessels reduces systemic resistance (afterload). The cumulative effect of reducing both preload and afterload is a decrease in the total workload imposed upon the cardiac muscle.


Constraint: Mechanisms of Pharmacological Tolerance

The drug's mechanism is subject to a limitation known as pharmacological tolerance, where the vasodilating capacity decreases during continuous exposure. This constraint is hypothesized to be due to the functional impairment or depletion of the bioreductive enzyme systems needed to generate the active NO mediator. This phenomenon indicates that non-continuous exposure is necessary to restore the full bioreductive capacity.

Dosage and Administration Information

The administration of Vasotrate, which contains Isosorbide Mononitrate (ISMN), is based on precise oral dosing schedules. The medicine is strictly for the oral route and is intended for the prevention of symptoms, not for intervention during an acute episode.

Dosing and Frequency Principles

The goal of the dosing pattern is to establish a daily nitrate-free interval to maintain efficacy over time.

Form Dosing Schedule Key Administration Detail
Immediate-Release (IR) Tablet Typically taken twice daily. Starting doses are often 20 mg, with maintenance ranges extending up to 120 mg daily, split into doses. The two daily doses must be taken with a specific gap, typically seven hours apart, to ensure the necessary drug-free period.
Extended-Release (ER) Tablet Taken once daily (OD). Starting doses are generally 30 mg or 60 mg, with a maximum dose of 240 mg daily. The single dose should be taken in the morning (upon arising) to accommodate the required nitrate-free interval.

Labeled Handling and Usage Conditions

Both tablet forms may be taken with or without food. The Extended-Release tablet must be swallowed whole with fluid and must not be crushed, chewed, or divided to preserve its controlled-release properties. Therapy should not be stopped suddenly; the dosage and frequency must be tapered gradually when discontinuation is required. For older adults, treatment typically begins at the low end of the dosing range.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Vasotrate (Isosorbide Mononitrate)

This overview summarizes the structure of the official research evidence that has been gathered for Vasotrate (Isosorbide Mononitrate), describing what the clinical studies examined and what patterns their findings indicate.


Evidence for use in Stable Angina Pectoris (Prevention)

Research has been conducted on the use of Vasotrate in individuals with stable angina pectoris, which is chest pain or discomfort resulting from reduced blood flow to the heart muscle. The evaluation primarily relies on randomized controlled trials (RCTs) and crossover studies designed to examine how symptoms change over time by comparing the medication against an inactive substance (placebo).

Studies monitored key outcomes related to functional imbalance, recording the frequency of angina attacks and patient-reported outcomes describing perceived discomfort. Findings describe patterns observed in the studies related to measurements of the rate of angina episodes and corresponding measurements of exercise time. However, research describes the development of nitrate tolerance and a need for specific dosing schedules, and there is limited information for long-term outcomes regarding the prevention of major outcomes related to heart and blood vessel health.


Studies Evaluating Use in Heart Failure with Preserved Ejection Fraction (HFpEF)

Studies for Vasotrate in patients with a specific form of heart failure known as HFpEF (Heart Failure with Preserved Ejection Fraction) are derived from large, multicenter randomized controlled trials. This research explored changes in objective exercise capacity and daily physical activity using specialized tracking devices.

In trials focusing on functional measures, research highlights patterns where studies reported no measurable difference in objective exercise capacity. Furthermore, studies reported a pattern where patients receiving the drug showed lower levels of measured daily physical activity compared to those on placebo. The specific reason behind the reported activity patterns in these studies is still being discussed by researchers. Data for other populations, such as children or women who are pregnant or breastfeeding, remain insufficient.

Key Studies & References

  1. Isosorbide Mononitrate Extended-Release Tablets: FDA Labeling and Product Information
  2. Isosorbide Mononitrate Drug Information (MedlinePlus)
  3. Effects of long-term isosorbide mononitrate therapy on blood pressure in elderly patients with isolated systolic hypertension: a double-blind, randomized, controlled trial

Frequently Asked Questions (FAQ)

Common questions about Vasotrate (FAQ)


Q: Is Vasotrate used for long-term or short-term treatment in official guidelines?

Official regulatory documents describe Vasotrate as being used for the prevention of angina pectoris symptoms, an indication that is typically intended for chronic, or long-term, use. The medication is intended for daily use for the purpose of symptom prevention.

Q: What serious side effects require immediate attention, according to the official documents?

Official documents list several serious adverse reactions, which should be reviewed in the safety information. These include signs of low blood pressure like syncope (fainting) and a rare blood condition called methemoglobinemia (which can cause pale or bluish skin color). A potential worsening of angina is also listed as a severe event.

Q: Does Vasotrate require a special type of prescription or monitoring?

The label indicates that monitoring for hypotension (low blood pressure) is relevant because of the documented risk of severe blood pressure drops. This is especially important when the drug is co-administered with other blood pressure-lowering medications.

Q: What is the difference in action between Vasotrate and a typical blood pressure medication?

Vasotrate is classified as an organic nitrate, which primarily works by creating Nitric Oxide in the body to cause blood vessels to widen. This action reduces the workload on the heart. Other types of blood pressure medications, like beta-blockers, reduce blood pressure through different chemical pathways.

Q: Are there any warnings about driving or operating heavy machinery while on Vasotrate?

Regulatory labeling documents the potential for impairment of the ability to drive or operate heavy machinery. This warning is based on the potential for side effects such as dizziness or fainting, particularly when treatment is initiated or a change in dosage occurs.

Q: What is the relevance of blood pressure monitoring while taking Vasotrate?

Blood pressure monitoring may be necessary because the medication’s primary action can cause severe hypotension (a profound drop in blood pressure). This hypotensive effect is a primary safety concern and is made significantly worse if the medication is used with certain other blood pressure-lowering agents.

Q: What is the purpose of the different strengths of Vasotrate available?

The availability of different strengths is detailed in the official dosing instructions to allow for gradual dose adjustment (titration). The various strengths are needed to accommodate the established maintenance dose ranges documented in the label.

Q: What information is available about the potential long-term effects of using Vasotrate?

Official sources provide safety information based on adverse effects observed during initial clinical trials and continuous post-marketing surveillance. While this data covers the recognized adverse effects, regulatory documents generally do not include a single, comprehensive, and definitive statement on every potential long-term consequence.

Q: Can Vasotrate be taken with over-the-counter pain relievers like ibuprofen?

Regulatory documents list interactions with other medications that affect blood pressure. Interactions are possible, as certain non-steroidal anti-inflammatory drugs (NSAIDs), which include common OTC pain relievers, may affect the vasodilating mechanism of the drug.

Q: How long does it usually take for Vasotrate to start producing effects?

The official pharmacokinetic data describes how quickly the medicine begins to work in the body. For the Immediate-Release tablet, the onset of action is generally reported as being within 20 minutes, with the medication reaching its peak effect about 30 to 60 minutes after being taken.

Q: What is the expected time frame for noticing the full benefits of Vasotrate?

Official information derived from clinical studies indicates that the full therapeutic benefit is generally assessed over the course of several days to a few weeks. This time frame relates to the period over which the full therapeutic effect is generally assessed.

Q: If a dose of Vasotrate is forgotten, what do the official instructions advise?

The patient information advises that if a dose is forgotten, the next dose should be taken at the regularly scheduled time. It is specifically advised not to take two doses together to make up for the one that was missed.

Q: Where can I find published clinical trial data for Vasotrate?

To find the source of published clinical trial data for Vasotrate, one must refer to official governmental resources. These include the NIH's clinical trials database or the regulatory agency's website, which provide summaries and details from the studies.

Q: Are there new or ongoing research studies about Vasotrate?

Information about new or ongoing research studies involving Vasotrate is collected in official, government-maintained resources. These studies can be identified by searching databases such as ClinicalTrials.gov.

Q: Are regular blood tests required while taking Vasotrate?

According to regulatory documentation, routine, regular blood tests are generally not required for the typical course of therapy. However, specific blood monitoring may be advised in rare instances, such as to check for the development of methemoglobinemia or in patients with severe anemia.

Q: How long has Vasotrate been authorized for prescription use?

The date the medication was first authorized for prescription use is officially recorded by the regulatory agency that granted approval. This information is typically found on the agency's public website or within the history section of the full prescribing information.

Q: Are there any known issues with traveling across different time zones while taking Vasotrate?

Official dosing instructions emphasize the necessity of maintaining a nitrate-free interval each day to prevent the development of pharmacological tolerance. The label emphasizes the need to maintain this critical interval, which means travel across time zones may require careful consideration of the dosing schedule.

Q: Does Vasotrate contain common allergens such as lactose or gluten?

The official product information provides the complete list of all ingredients, including the excipients (inactive ingredients). This list details any common allergens in the formulation, such as lactose or gluten, as required by regulatory bodies.

Q: What does the official package insert describe regarding an accidental overdose of Vasotrate?

The official package insert for Vasotrate contains a dedicated section describing the management and expected symptoms of an overdosage. The documented symptoms typically include severe hypotension (very low blood pressure), excessive flushing, and a severe headache.

Q: Does Vasotrate have any known effect on mood or cognitive function?

Official adverse reaction lists in the product information may include potential central nervous system effects. Such effects can relate to cognitive function or mood, and may be described as events such as confusion or anxiety.

How should Vasotrate be stored and disposed of?

How to Store and Dispose of Vasotrate (Isosorbide Mononitrate)

Official regulatory labeling dictates specific conditions for storing and disposing of Vasotrate tablets to maintain stability.

Storage Requirements

  • Temperature: The medication must be kept at a controlled room temperature (e.g., between 15 C and 30 C / 59 F and 86 F) and must be protected from freezing and excessive heat.
  • Protection: The tablets must be protected from light and excessive moisture. Keep the product in its original container with the lid tightly closed.
  • Child Safety: For safety, Vasotrate must be stored out of the sight and reach of children.

Disposal Instructions

Unused or expired medication must be handled as pharmaceutical waste. Do not dispose of Vasotrate by flushing it down the toilet or throwing it in the household trash. Disposal should follow official guidance, such as using a drug take-back program or consulting a healthcare professional.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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