Gonitro

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Gonitro

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Medically reviewed

Marina Burgos

Last updated on 22/12/2025

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 Gonitro

Quick Facts: Gonitro

Property Description
Active ingredient Nitroglycerin (Glyceryl trinitrate)
Form Translingual spray (Metered dose spray)
Pharmacological class Organic nitrate, Vasodilator
Common use Antianginal agent (for acute oxygen deficiency)
Origin Synthetic compound

The Core Identity: What Type of Medicine is Gonitro?

Gonitro is a rapid-acting, prescription-only medication whose active ingredient is Nitroglycerin, formally known as Glyceryl trinitrate (GTN). This compound is classified as an Organic nitrate and an anti-ischemic Vasodilator within the domain of Cardiovascular drugs. Nitroglycerin is used in medicine for its ability to relax smooth muscle fibers. This means the medication is designed to physically relax the walls of the body's blood vessels. It is manufactured as a single active ingredient product, synthesized chemically rather than derived from natural sources, making it a synthetic compound. The classification as a Vasodilator relates to its effect on circulatory dynamics.

Composition and Delivery: Translingual Spray Form

The formulation of Gonitro is delivered as a Translingual spray, specifically a Metered dose spray, designed for application onto the oral mucosa or under the tongue. This format is a defining characteristic, differentiating it from sublingual tablets and patches. The medication consists of the active Nitroglycerin stabilized in a non-aqueous vehicle for deployment and absorption. The translingual route of administration is utilized for Nitroglycerin because it provides a rapid onset of action. This ensures the medication acts quickly, which is relevant for time-sensitive symptoms. This specialized aerosol format and the translingual route are integral to the drug's identity, allowing for the entry of the active compound into the bloodstream.

General Purpose as an Antianginal Agent

The general purpose of Gonitro is to serve as an Antianginal agent, addressing states of acute myocardial oxygen deficiency (ischemia). It is typically used in situations requiring rapid relief of discomfort associated with coronary artery disease. Its function is to reduce the heart's overall effort and improve its oxygen supply concurrently. By facilitating widespread vasodilation, the medication decreases the heart's workload while promoting enhanced blood flow, thus addressing the acute state of tissue ischemia. This dual action modifies the body's vascular tone.

Regulatory References

  1. NIH StatPearls Nitroglycerin Monograph

What side effects are possible with Gonitro?

Possible Side Effects and Safety Information

The safety profile of Gonitro (Nitroglycerin translingual spray) is derived from its function as a powerful vasodilator, and officially documented adverse reactions are categorized by frequency and affected body systems in regulatory labels.

Frequency and Organ Systems

The most frequent effects are linked to the drug's action on the vascular and nervous systems. Headache is classified as Very Common, often being the most encountered effect. Common reactions include Dizziness, Tachycardia (increased heart rate), Hypotension (low blood pressure), and Flushing (redness of the face or neck).

System-Organ Class Example Adverse Reactions (Label-Documented)
Nervous System Disorders Headache, Dizziness
Vascular Disorders Hypotension, Flushing
Gastrointestinal Disorders Nausea, Vomiting (Uncommon)

Safety Constraints and Special Considerations

Official documents highlight reactions that involve significant risk. Severe Hypotension and Syncope (fainting) are documented serious adverse reactions. The risk of hypotension may be increased in specific groups, such as older adults or those with pre-existing low blood pressure or volume depletion.

Time-related patterns are noted, with the Headache reaction being more frequent at the start of treatment and often diminishing upon continued use. The most critical safety restriction is the absolute contraindication with co-administration of Phosphodiesterase Type 5 (PDE5) Inhibitors due to the risk of life-threatening profound hypotension. Furthermore, use is generally restricted in severe conditions such as severe anemia or increased intracranial pressure.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose with Gonitro (glyceryl trinitrate) primarily manifests as a consequence of extreme vasodilation, leading to life-threatening hemodynamic instability.

Domain Official Regulatory Statements
Documented Overdose Presentations Symptoms include severe hypotension, reflex tachycardia (or paradoxical bradycardia), persistent throbbing headaches, dizziness, flushing, and nausea/vomiting. High doses carry a risk of methemoglobinemia, which presents with cyanosis (blue discoloration of the skin/lips).
Severe/Life-Threatening Outcomes Overdose can lead to circulatory collapse or shock, and severe CNS effects like convulsions or coma have been documented.
When Immediate Medical Help Is Required Prompt medical attention is required if chest pain persists after a total of three sprays have been administered within a 15-minute period. Contact emergency medical services immediately for suspected overdose.

Management protocols are focused on supporting the cardiovascular system. For severe hypotension, official guidance describes supportive measures such as elevation of the extremities and central volume expansion. Methylene Blue is the specific intervention for treating methemoglobinemia. Regulators explicitly warn that Adrenaline (Epinephrine) is contraindicated for managing severe hypotension associated with this type of overdose. The risk of methemoglobinemia is increased in individuals with methemoglobin reductase deficiencies.

Therapeutic Uses of Gonitro

The therapeutic role of Gonitro (nitroglycerin translingual spray) is defined by its use in addressing acute symptoms and providing preventative support. The medication is indicated for managing symptoms related to chest pain and may also be part of symptomatic management to help reduce the likelihood of these episodes occurring. This dual capacity is considered relevant for patients with coronary artery disease.

Gonitro is commonly used for symptomatic relief for acute discomfort and may be part of symptomatic management for the recurrent symptomatic manifestations associated with Stable Ischemic Heart Disease. Therapeutic uses generally include the management of acute angina episodes and prophylaxis before predictable exertion or stress. The medication helps address the pronounced symptom cluster of chest pressure, squeezing, and tightness.

“This intervention supports short-term symptomatic management and assists with maintaining comfort during symptomatic periods.”

This preventative use is commonly applied in clinical scenarios where symptoms are predictable, such as before engaging in physical exertion or facing a significant emotional stressor. It is intended to contribute to day-to-day comfort by helping to ease the overall burden of symptoms that create noticeable interference with daily stability.

Quick Fact: Relief for Angina Pectoris
Core Symptomatic Use: Relief for acute episodes of chest discomfort.
Supportive Use: Prophylactic support before strenuous activity or stress.
Benefit Focus: Easing the overall symptom load and helping patients cope more steadily.

Regulatory References

  1. Nitroglycerin Spray: MedlinePlus Drug Information

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use Gonitro

The following rules for using Gonitro (Nitroglycerin translingual spray) are established by official government regulatory documents.

Category Regulatory Statement
Approved Population Adults are the approved demographic for use.
Contraindicated Groups Use is strictly prohibited for patients taking Phosphodiesterase Type 5 (PDE-5) Inhibitors (e.g., sildenafil) or Soluble Guanylate Cyclase (sGC) Stimulators (e.g., riociguat).
Comorbidity Prohibitions The medicine must not be used in patients with Severe Anemia, Increased Intracranial Pressure, Acute Circulatory Failure, or Shock.
Pediatric Use Safety and effectiveness have not been established in children and adolescents (under 18 years of age); therefore, use is not recommended in this age group.
Geriatric Use Dose selection for older adults should be cautious and at the low end of the dosing range, reflecting the greater frequency of decreased organ function.
Conditional Use Caution is required in patients with certain conditions like Hypertrophic Cardiomyopathy or who are Volume-Depleted.
Pregnancy/Lactation Limited human data are insufficient to determine drug-associated risk during pregnancy. It is not known if the drug is present in human milk during lactation.

These official regulatory statements define the mandatory exclusions and conditional use requirements for this medicine.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Gonitro’s official interaction profile, based on government regulatory documentation, is defined by its core action as a vasodilator, leading to mandated prohibitions and additive hypotensive effects with several substances.


Interaction Classifications and Restrictions

Classification Interacting Substance or Product Regulatory Statement
Absolutely Contraindicated PDE-5 Inhibitors (e.g., Sildenafil, Tadalafil, Vardenafil) Co-administration is prohibited due to the potential for severe hypotension, syncope, or myocardial ischemia [FDA Label].
Absolutely Contraindicated sGC Stimulators (e.g., Riociguat) Concomitant use is prohibited due to the risk of severe hypotension [FDA Label].
Additive Hypotensive Effects Antihypertensive Agents (e.g., Beta-blockers, Calcium Channel Blockers) Patients should be observed for possible additive blood pressure lowering effects [Regulatory Summary].
Altered Exposure Risk Ergotamine and related drugs Co-administration should be avoided as oral nitroglycerin markedly decreases the first-pass metabolism of certain ergot alkaloids, leading to increased exposure [FDA Label].

Other Documented Constraints

  • Alcohol (Ethanol): Alcohol consumption may enhance sensitivity to the blood pressure lowering effects of nitrates, increasing the risk of low blood pressure [DailyMed NIH].
  • Timing Restriction: While the combination with PDE-5 inhibitors is contraindicated, regulatory advice against using nitroglycerin within a few days of taking these inhibitors is noted.

The regulatory profile clearly establishes a definitive structure of contraindications with certain vasodilatory drugs due to synergistic hypotensive risk, while also flagging other substances for additive effects that require careful attention.

Mechanism of Action

The mechanism of Gonitro (Nitroglycerin) is rooted in its action as a prodrug that directly influences the body’s endogenous Nitric Oxide (NO) signaling pathway, leading to a modulation of vascular muscle tone.

1. Enzymatic Activation and the NO/cGMP Cascade

Gonitro is converted by the enzyme Aldehyde Dehydrogenase 2 (ALDH2) into Nitric Oxide (NO), a key signaling molecule. This NO then activates Soluble Guanylate Cyclase (sGC), triggering a cascade that increases the secondary messenger cyclic Guanosine Monophosphate (cGMP). This molecular sequence acts within domains involving enzyme-mediated signaling, resulting in the commencement of smooth muscle relaxation.

2. Selective Vascular Smooth Muscle Modulation

The resulting increase in cGMP levels causes the active relaxation of smooth muscle fibers within blood vessel walls (vasodilation), with the most pronounced effect occurring in the venous system. This engagement of mechanisms that regulate vascular muscle tone modifies pressure dynamics within the circulatory system.

3. Modulating Cardiac Hemodynamics

The resulting venodilation reduces the blood volume returning to the heart (cardiac preload), which lowers the wall tension and mechanical load on the heart muscle. This action is simultaneously accompanied by coronary artery dilation, which increases the delivery of blood and oxygen to the heart tissue.

Dosage and Administration Information

How to Use Gonitro

This section describes the administration principles, dosing, and specific procedural requirements for Gonitro (Nitroglycerin Translingual Spray). The medicine is characterized by an as-needed (PRN) use pattern, which distinguishes it from daily maintenance therapies.


Administration and Dosage Regimens

Usage Context Dosing Schedule Frequency and Maximum Limit
Route of Administration The dose is delivered via Translingual administration, sprayed onto or under the tongue. The medication must not be inhaled.
For Acute Use One or two metered sprays (400 mcg to 800 mcg) administered at the onset of an event. Dosing may be repeated approximately every 5 minutes; the maximum cumulative dose is 3 sprays within 15 minutes.
For Prophylactic Use One or two metered sprays administered 5 to 10 minutes prior to engaging in a precipitating activity. This application is used intermittently, on an as-needed basis.

Procedural and Population Requirements

Special Procedural Conditions:

Before initial use, the pump must be primed (such as 5 to 10 test sprays) into the air, and it requires re-priming if unused for a specified period, such as six weeks. During administration, it is recommended to rest, ideally in the sitting position. After dosing, it is important to not spit out or rinse the mouth for 5 to 10 minutes to allow for proper absorption.

Age-Group Administration:

The translingual spray is not approved for use in pediatric patients.

Recent Clinical Evidence

Recent Clinical Evidence

It is important to understand the different research perspectives on the combination of Drug A and Drug B and the questions the studies sought to answer regarding chronic lower back pain. Research has primarily focused on two areas: the effect on symptom change, analyzed through self-reported pain scores and ability to perform daily activities, and the tolerability profile, evaluated by monitoring the frequency of side effects and adverse events.

Combination Regimens and Study Findings

Studies investigated whether using the two agents together was associated with different outcomes compared to when either Drug A or Drug B was used alone. Early-stage trials focused on examining the tolerated dose range and monitoring common adverse events over short periods, such as dizziness and nausea.

Later-stage trials have explored the frequency of a positive change in overall outcome in subjects receiving the combination. However, available evidence regarding the combination consists mainly of short-term trials (typically 12 weeks or less), and data for periods longer than six months are not yet available from the current research.

Limitations and Gaps in Evidence

The current research body has several limitations. The studies reviewed did not include patients with moderate or severe liver impairment, meaning research results regarding patient tolerability in this group are not available. Similarly, evidence remains limited for patients over 75 years of age.

Furthermore, while research evaluated whether the combination was associated with changes in pain scores, the direct causal mechanism for any reported changes is still under investigation. Any observed associations in the studies do not automatically imply a cause-and-effect relationship, and it is not appropriate to compare this combination to other treatments without direct comparative evidence.

Key Studies & References NICE Guideline NG59: Chronic pain (primary and secondary) in over 16s: assessment of all chronic pain and management of chronic primary pain

Frequently Asked Questions (FAQ)

Common questions about Gonitro (FAQ)


Q: What is Gonitro primarily used to treat?

A: Gonitro is indicated in official product information for the acute relief and acute prevention (prophylaxis) of a condition called angina pectoris.

Angina pectoris is the chest pain that occurs due to coronary artery disease.


Q: Is Gonitro used for acute or chronic conditions?

A: According to regulatory documents, the spray is used for the acute relief of an angina attack that has already started and for acute prophylaxis (prevention) just before an activity known to cause symptoms.

It is not intended to be used as a daily maintenance treatment for the underlying chronic condition.


Q: Does Gonitro treat the underlying problem or just the symptoms?

A: Official information describes the medication as a vasodilator. This means it works by relaxing and widening blood vessels to increase blood flow, which helps to relieve the chest pain (symptom).

It is not a medication designed to treat the underlying coronary artery disease itself.


Q: Is Gonitro an antibiotic or a pain reliever?

A: Gonitro is classified in regulatory documents as an Antianginal Agent and a Vasodilator.

It belongs to a class of medicines known as nitrates.


Q: What is the active ingredient in Gonitro?

A: The active ingredient in Gonitro is Nitroglycerin, which is also referred to as Glyceryl Trinitrate in some official documents.


Q: Are there different forms of Gonitro available (e.g., tablet, liquid)?

A: The active ingredient, Nitroglycerin, is available in various official forms for different uses.

These include translingual sprays (like Gonitro), sublingual tablets, oral capsules, patches, and ointments.


Q: How quickly can I expect Gonitro to start working?

A: This type of medication is considered fast-acting. Official documents describe the onset of therapeutic effect as rapid, often within 1 to 3 minutes.

The maximal effect is generally stated to occur within approximately 5 minutes.


Q: How long does the effect of Gonitro typically last?

A: The drug is intended for short-acting, immediate relief. The official dosing instructions state that a dose may be repeated approximately every 5 minutes as needed.

This indicates a short duration of action is expected.


Q: Is the long-term use of Gonitro supported by research?

A: Regulatory documents describe the potential for the development of tolerance if the medication is used excessively.

Available clinical evidence for this drug mainly consists of short-term trials, with long-term data (over six months) being limited.


Q: How does Gonitro compare to placebo in clinical studies?

A: Research summarized in regulatory documents confirms that clinical studies have examined whether the use of the medication is associated with a positive change in outcomes when compared to an inactive substance (placebo) or when used alone.


Q: Is Gonitro safe for children?

A: According to official regulatory sources, the translingual spray dosage form is not approved for use in pediatric patients.


Q: Can older adults use Gonitro safely?

A: Regulatory documents indicate that dose selection for older adults should typically start at the lower end of the dosing range.

This approach is based on the observation of a greater frequency of decreased organ function, such as kidney or liver function, in this population.


Q: Can people with a history of heart issues use Gonitro?

A: Official information states that the medicine is contraindicated (should not be used) in certain severe heart conditions, such as hypertrophic obstructive cardiomyopathy.

Caution is generally advised for use in patients with a recent heart attack or other pre-existing heart conditions.


Q: Can people with kidney problems use Gonitro?

A: Caution is generally advised when the medicine is used in patients with renal dysfunction (kidney problems).

Some official documents contain specific statements regarding potential dosing adjustments for patients with severe kidney impairment.


Q: Does Gonitro affect liver function?

A: The drug is rapidly metabolized by the liver. Due to this process, caution is generally advised for use in patients with a history of liver disease or known impaired liver function.


Q: Are there known genetic factors that affect how Gonitro works?

A: The official mechanism of action notes that the drug is converted by the enzyme Aldehyde Dehydrogenase 2 (ALDH2) into its active form.

This enzymatic process, which can be influenced by individual genetic factors, is necessary for the medicine to work.


Q: Is there any information about using Gonitro during pregnancy?

A: Official information states that inadequate data is available on the use of this drug in pregnant women to fully inform risk.

Use is only recommended if the potential benefit is judged to outweigh the potential risk.


Q: Is Gonitro safe to use while breastfeeding?

A: Regulatory information states it is unknown if the drug is excreted into human milk.

Official guidance states that a decision must be made to either discontinue nursing or discontinue the use of the drug, considering the importance of the drug to the mother.


Q: Do many people experience a rash from Gonitro?

A: While common side effects include headache and dizziness, official safety information notes rare but serious adverse reactions.

These rare reactions can include allergic reactions or a severe rash, sometimes referred to as exfoliative dermatitis.


Q: Is Gonitro safe to use before driving or operating machinery?

A: Official safety information advises against driving or operating heavy machinery until the user knows how the medication affects them.

This guidance is given because the medication can cause temporary side effects such as dizziness or low blood pressure.


Q: Are there specific symptoms that require immediate medical attention while using Gonitro?

A: Regulatory instructions advise seeking prompt medical attention if chest pain persists after a total of three sprays has been administered within 15 minutes.

Medical attention is also required for signs of serious adverse reactions, such as profound low blood pressure or fainting.


Q: What happens if I miss a scheduled time for Gonitro?

A: This medication is primarily described as an 'as-needed' treatment, used at the onset of an event or just before an activity known to cause symptoms.

Official instructions do not typically contain guidance for 'missed' daily doses because of its specific use pattern.


Q: What is the difference between Gonitro and generic versions of the drug?

A: Official regulatory documents advise against unintentionally switching between different brands of nitroglycerin spray.

This is because not all products that contain the same active ingredient are considered bioequivalent, meaning they may not work in the exact same way or at the same speed.


Q: How long has Gonitro been available?

A: The drug substance, nitroglycerin, has been used in medicine since the late 1800s.

The specific translingual spray dosage form was approved by national regulatory bodies, such as the FDA, around the year 2000.


Q: What official body approved Gonitro?

A: The drug is regulated and approved for use by national governing bodies in each country where it is marketed.

Examples include the U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA).


Q: Does Gonitro require a prescription?

A: Gonitro is officially classified as a prescription-only medication.

How should Gonitro be stored and disposed of?

Storage and Disposal Instructions for Gonitro (Nitroglycerin)

Storage Requirements

Gonitro must be stored at Controlled Room Temperature, typically between 20 C and 25 C (68 F and 77 F), with excursions permitted between 15 C and 30 C. It is mandatory to keep the medication out of the reach and sight of children. The container must be stored upright and kept in its original package to protect it from light and moisture. Do not expose the spray to temperatures above 50 C, and do not freeze or refrigerate.

Disposal Instructions

Follow specific disposal guidance provided in the product labeling. As an aerosol containing a flammable propellant, the container must not be pierced or burned. The preferred method for discarding unused or expired product is through a drug take-back program. If a program is unavailable, consult local regulations regarding the disposal of flammable aerosol medications.

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

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