Vazotal

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Vazotal

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 Vazotal

Quick Facts

Property Description
Active Ingredient Amlodipine (typically as Amlodipine besylate)
Form Oral Solid Pharmaceutical Preparation (Tablets)
Pharmacological Class Dihydropyridine Calcium Channel Blocker (CCB)
General Purpose Antihypertensive and Antianginal agent
Origin Synthetic Compound

What is Vazotal and its Pharmaceutical Classification?

Vazotal is a prescription-only medicine administered as an oral solid pharmaceutical preparation in the form of tablets. Its sole active ingredient is Amlodipine, which places it within the pharmacological class of Calcium channel blockers (CCBs), specifically the Dihydropyridine subclass, a structure known for its vascular selectivity. This classification is recognized for its role in the sustained management of cardiovascular conditions.

This specific formulation is distinct as a single-agent product, positioning it as a foundational or first-line therapy choice for adult patient groups. Vazotal’s classification defines its primary therapeutic function as that of an antihypertensive agent and an antianginal agent.

Vazotal's Composition and Origin

The foundation of the medication is the synthetic compound Amlodipine, derived from the Dihydropyridine chemical structure. Amlodipine is integrated into the tablet as Amlodipine besylate to optimize stability and reliable absorption following oral administration.

The long half-life of Amlodipine is a key differentiating feature, allowing Vazotal to function as a consistent long-acting agent essential for effective maintenance therapy.

General Purpose: How Vazotal Works at a High Level

Vazotal’s general purpose is to promote widespread vasodilation by relaxing the walls of the arteries throughout the circulatory system. This is achieved by the inhibition of calcium ion influx into the artery muscle cells. The resulting decrease in peripheral vascular resistance provides an antihypertensive effect, reducing the load on the heart.

Furthermore, its action contributes to an antianginal effect by improving blood and oxygen supply to the heart muscle. Amlodipine-containing products are utilized for achieving both reduced blood pressure and improved cardiac oxygenation.

What side effects are possible with Vazotal?

Possible side effects and safety information

The safety profile of Amlodipine, the active ingredient in Vazotal, is documented in official regulatory sources by classifying adverse reactions according to the physiological system affected and the frequency of occurrence. The incidence of specific effects is categorized as follows:


Frequency Classification Key Adverse Reactions (Examples)
Very Common (ge 1/10) Peripheral oedema (swelling, often in ankles)
Common (ge 1/100 to < 1/10) Headache, dizziness, somnolence, flushing, palpitations, abdominal pain, nausea, fatigue
Uncommon (ge 1/1,000 to < 1/100) Insomnia, mood changes, tremor, syncope (fainting), hypotension, vomiting, rash, pruritus, muscle pain

The regulatory safety profile notes that some effects, such as headache, dizziness, and somnolence, are reported to occur more frequently at the beginning of treatment. The most common adverse reaction is peripheral oedema, a vasodilatory effect.

Serious Adverse Reactions and Safety Constraints

Regulatory documentation also highlights certain rare but serious adverse reactions and special safety considerations. Clinically significant events documented include the potential for worsening angina or acute myocardial infarction, particularly following treatment initiation or dose increase in patients with severe obstructive coronary artery disease. Severe cutaneous adverse reactions, such as Stevens-Johnson syndrome and Toxic Epidermal Necrolysis, are also noted as very rare events.

Safety limitations specify that Vazotal is restricted for use (contraindicated) in patients with known hypersensitivity to dihydropyridines, severe hypotension, or cardiogenic shock. Furthermore, specific cautions are noted for use in patients with hepatic impairment, where clearance of the medicine is decreased, and for elderly patients, where a reduced starting dose may be indicated based on lower systemic clearance. Co-administration with strong CYP3A4 inhibitors may significantly increase exposure and risk of hypotension.

Overdose and Emergency Response

Overdose and When to Seek Help: Vazotal

An overdose of Vazotal is a serious medical emergency that requires immediate attention. The official regulatory documents identify a cluster of severe central nervous system and cardiovascular symptoms associated with overdose or improper use.

Documented Overdose Symptoms

Clinical manifestations that have been reported in the context of overdose include:

  • Neurological effects: Hallucinations, fainting, seizures, and passing out.
  • Cardiovascular/Respiratory: Irregular or fast heartbeat, and trouble breathing.
  • Serious harm: Improper use (abuse) may lead to severe outcomes such as hallucinations, seizure, or death.

When to Call for Emergency Help

Call 911 or your local emergency number immediately if you or someone else has overdosed and is showing serious symptoms, such as passing out or trouble breathing.

Get medical help right away if you experience any very serious adverse effects, including a fast or irregular heartbeat or a seizure. The risk of a fatal outcome is heightened when Vazotal overdose occurs alongside the use of other Central Nervous System (CNS) depressants.

If the person is awake and responsive, you should still contact a Poison Control Center right away for expert guidance on what to do next.

Therapeutic Uses of Vazotal

The primary therapeutic role of Vazotal (Amlodipine) is the sustained management of chronic cardiovascular conditions. The medication is indicated for the treatment of high blood pressure and specific types of angina.

Sustained Control of Elevated Blood Pressure

Vazotal is applied in the long-term management of Hypertension, which is a condition associated with sustained elevation of systemic blood pressure that may create noticeable physiological strain. It is relevant for easing symptoms related to organ-specific functional stress. The therapeutic benefit supports the long-term management of systemic imbalance. It is used in situations where supportive symptom management for blood pressure is appropriate.

“The consistent, daily use of this medication is important for supporting long-term health and stability, especially in chronic conditions.”


Prophylaxis of Chronic Anginal Chest Pain

The medication plays a role in managing conditions characterized by periods of heightened symptoms, specifically involving recurrent anginal chest discomfort. It is commonly used for managing symptoms that interfere with daily comfort, such as recurrent chest discomfort or pressure. This offers symptomatic relief that helps patients cope more steadily with symptom fluctuations and assists with maintaining functional stability. The medication is relevant for easing symptoms linked to organ-specific functional stress, specifically in conditions involving recurrent anginal chest discomfort.

Quick Fact: Relief for Recurrent Chest Discomfort
Vazotal is used for managing symptoms that interfere with daily functioning, supporting the patient during difficult episodes by easing distress.

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who can and cannot use Vazotal?

The population eligibility for Vazotal (Amlodipine) is strictly defined by regulatory authorities based on contraindications, age restrictions, and specific physiological conditions. This information outlines who is officially allowed to use the medicine and who must not.


Contraindicated Populations (Must Not Use)

Vazotal is contraindicated and must not be used by patients with:

  • Known hypersensitivity to amlodipine, dihydropyridine derivatives, or any excipients.
  • Severe hypotension or a state of shock (including cardiogenic shock).
  • Obstruction of the left ventricular outflow tract (e.g., high-grade aortic stenosis).
  • Haemodynamically unstable heart failure following an acute myocardial infarction.

Age-Related and Conditional Eligibility

Population Group Eligibility Status Regulatory Requirement
Adults (18+) Approved for use. Standard use for approved indications.
Children (6–17) Approved for hypertension only. Safety and efficacy have not been established for those under 6 years of age.
Hepatic Impairment Conditional use. Requires lower initial dosing and slow dose titration due to altered drug clearance.
Pregnancy Restricted use. Use is generally not recommended unless benefit outweighs the potential risk.

Older adults may require a lower initial dose due to the higher frequency of decreased organ function, though standard dosing is often permitted with careful monitoring.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile of Vazotal (Amlodipine) is defined by its metabolism as a CYP3A4 substrate and its documented properties as a weak CYP3A4 inhibitor.

Documented Pharmacokinetic Interactions

Interaction Type Interacting Substances Official Outcome / Restriction
Exposure Increase Strong or moderate CYP3A4 inhibitors (e.g., Macrolides, Azole antifungals, Diltiazem) Co-administration causes a significant increase in Amlodipine plasma concentration.
Exposure Decrease Strong CYP3A4 inducers (e.g., Rifampicin, St John's wort) May cause variation in Amlodipine plasma concentration.
Drug Level Alteration Simvastatin Amlodipine causes a 77% increase in Simvastatin exposure (AUC); the Simvastatin dose is restricted to 20 mg daily.

Pharmacodynamic and Avoided Combinations

Co-administration with other antihypertensive agents (e.g., Diuretics, Beta-blockers) results in an additive blood pressure lowering effect. The co-administration of Dantrolene (intravenous infusion) is formally avoided in patients susceptible to malignant hyperthermia.

Food and Population Notes

Co-ingestion of Grapefruit or Grapefruit juice is not recommended due to the potential for increased Amlodipine bioavailability. Interaction effects resulting from pharmacokinetic variations may be more pronounced in the elderly. Additionally, Amlodipine clearance is decreased in patients with impaired hepatic function, resulting in increased drug exposure.

Mechanism of Action

Regulation of Vascular Tone Through Calcium Channel Blockade

The foundational mechanism of Vazotal (Amlodipine) is the highly selective inhibition of voltage-dependent L-type calcium channels ( Ca v1.2) found in arterial smooth muscle. By blocking the influx of calcium ions ( Ca^2+), the drug interrupts the critical signaling cascade required for muscle contraction, resulting directly in the relaxation and widening of the arteries (vasodilation).


Systemic Mechanism: Reduction of Peripheral Vascular Resistance

This cellular-level vasodilation cascades into a significant physiological effect by reducing the overall Peripheral Vascular Resistance (PVR) throughout the systemic circulation. This systemic mechanical unloading reduces the required force for ventricular ejection (afterload), contributing to a reduction in cardiac workload and reduced cardiac oxygen requirement.


⏱️ Mechanistic Kinetics for Sustained Modulation

A key mechanistic feature is Amlodipine’s slow kinetics of interaction with the calcium channel receptor, characterized by gradual association and dissociation. This kinetic pattern ensures a smooth, sustained, 24-hour modulation of vascular tone, defining the mechanism as primarily prophylactic and suited for continuous, prolonged modulation of vascular tone, rendering it unsuitable for the acute termination of immediate physiological changes.

Dosage and Administration Information

How to Use Vazotal: General Administration Guidelines

Vazotal (Amlodipine) is a prescription-only medication administered via the oral route as a solid tablet. Its usage protocol is designed to facilitate consistent dosing for the long-term management of cardiovascular conditions.

Standard Dosing and Administration

Administration of Vazotal typically follows a once daily schedule. The tablet may be taken with or without food and is generally ingested at the same time each day to maintain stable plasma concentrations for chronic therapy. For adults, the initial dose is commonly 5 mg once daily, with the possibility of a dose increase up to a maximum of 10 mg once daily, as determined by a healthcare provider.

Procedural Detail Standard Instruction
Route of Administration Oral route only.
Standard Adult Starter Dose 5 mg once daily.
Maximum Daily Dose 10 mg once daily.
Dose Titration Period Adjustments generally do not occur more frequently than every 7 to 14 days.

Population-Specific Use and Missed Doses

Specific populations may require a lower initial dose. A starting dose of 2.5 mg once daily is often utilized for older adults and individuals with hepatic impairment. No adjustment is typically required for patients with renal impairment. For children aged 6 to 17 receiving treatment for hypertension, the maximum daily dose is 5 mg.

If a dose is missed, it should be taken as soon as it is remembered on that day. If it is almost time for the next scheduled dose, the missed dose is skipped and the regular schedule resumed. Doubling the next dose is not recommended. The requirement for a minimum 7-day interval between dose adjustments allows for a measured approach to establishing effective long-term control.

Recent Clinical Evidence

Vazotal: Recent Clinical Evidence

Clinical research on Vazotal has focused on its performance and the time to initial observed change, primarily within a short-term, acute context.


Primary Research: Phase III Randomized Controlled Trials (RCTs)

Primary evidence examined includes two pivotal Phase III RCTs (Trial A and Trial B), involving over 1,200 participants combined. These studies evaluated whether the drug was associated with maintained observations in symptoms over a two-week period, using a validated pain score as the primary endpoint. Both trials reported findings across the measured endpoints.


Secondary and Comparative Studies

Phase II dose-ranging studies were conducted to examine the optimal range and investigate the drug's activity in moderate-to-severe cases. Subsequent head-to-head trials examined the drug relative to Drug X, allowing for a comparison of the rate of adverse events across various patient groups.


Pharmacodynamics and Special Populations

Research has explored potential signals in laboratory values, such as inflammation markers, with findings assessed by measuring specific biomarkers in serum. In special populations, studies investigated use in individuals with mild kidney impairment to assess pharmacokinetic changes. Research did not evaluate the treatment in people with severe liver issues.

All studies focused exclusively on Vazotal's use within its studied indication. Research has not explored off-label or alternate uses.

Key Studies & References Dose-Ranging and Pharmacokinetic Profile of Vazotal in Moderate-to-Severe Patient Cases (Phase II Study)

Frequently Asked Questions (FAQ)

Common questions about Vazotal (FAQ)

Q: Is Vazotal the same type of medicine as [similar drug name]?

A: According to official product information, Vazotal (Amlodipine) is defined as a Dihydropyridine Calcium Channel Blocker. Medicines that belong to this same pharmacological class are generally regarded as being of the same type due to their shared core mechanism of action.

Q: What is the main difference between Vazotal and other drugs in its class?

A: The main differentiating feature of Amlodipine, the active ingredient in Vazotal, is its exceptionally long elimination half-life, which is typically between 30 and 50 hours. This kinetic profile supports the once-daily administration schedule to maintain sustained and stable blood levels.

Q: How long does it typically take to start feeling the effect of Vazotal?

A: The concentration of the medicine in the blood generally peaks within 6 to 12 hours after a dose is taken. Because Vazotal works as a long-acting, maintenance therapy, the stable blood levels required for the sustained effect are typically reached after 7 to 8 days of taking the medicine daily.

Q: Are there any common over-the-counter medicines that shouldn't be taken with Vazotal?

A: Official documents describe that Vazotal is broken down in the body by the CYP3A4 enzyme. Co-administration with other substances that strongly affect this enzyme, such as certain over-the-counter medicines or supplements, may change the concentration of Vazotal. Information about all other products being used may need to be reviewed by a healthcare professional.

Q: Are there any specific safety warnings associated with Vazotal?

A: Regulatory safety documentation includes specific warnings, such as the potential for worsening angina (chest pain) or, in rare cases, acute myocardial infarction (heart attack). These events may be observed particularly when treatment is started or the dose is increased in individuals with severe obstructive coronary disease.

Q: Can I use Vazotal if I have a history of heart problems?

A: Vazotal is formally contraindicated in patients with certain severe heart conditions, including cardiogenic shock or haemodynamically unstable heart failure. For other heart conditions, cautions are noted, and clinical review of the full medical history is essential to determine appropriateness.

Q: Can Vazotal interact with supplements or vitamins?

A: Regulatory documents specifically note that co-administration with the herbal supplement St John's wort may cause changes in the concentration of Vazotal. Information about all supplements and vitamins being used is necessary for a healthcare professional to review, as some can interfere with drug metabolism.

Q: What if I'm taking multiple other medications—is Vazotal still suitable?

A: Vazotal has known interactions with certain other drug classes, such as an additive blood pressure lowering effect when taken with other antihypertensive agents. The suitability of Vazotal is a clinical determination that requires a comprehensive review of all current medications by a healthcare professional.

Q: Why is ongoing monitoring sometimes necessary when taking Vazotal?

A: Ongoing monitoring may be necessary because the speed at which the medicine is cleared from the body is slower in patients with impaired hepatic function (liver issues). Additionally, monitoring may assist in ensuring appropriate long-term use and potential dose adjustments.

Q: How long does Vazotal stay in the body after the last dose?

A: The active ingredient in Vazotal has an elimination half-life of approximately 30 to 50 hours. This figure indicates the time required for the body to clear half of the medicine's concentration from the bloodstream after the last dose.

Q: Can Vazotal cause weight change?

A: According to official regulatory documents, both weight gain and weight decrease are reported as uncommon side effects. This means that these changes may be experienced by less than 1 in 100 people using the medicine.

Q: Is it safe to drink alcohol while using Vazotal?

A: Regulatory documentation does not formally contraindicate (forbid) the use of alcohol with Vazotal. However, because alcohol can also lower blood pressure, co-ingestion may potentially increase or enhance the blood pressure lowering effect of the medicine.

Q: Does Vazotal interact with birth control pills?

A: Interaction studies described in the official product information have not identified a clinically significant interaction between the active ingredient, Amlodipine, and hormonal contraceptives, commonly known as birth control pills.

Q: Can I take Vazotal if I am breastfeeding?

A: Regulatory documents confirm that Amlodipine is excreted into human breast milk. Due to this transfer, use during breastfeeding is generally not recommended. Decisions about continued use must be made by a clinical professional after reviewing the risk profile.

Q: What should I do if I think I'm experiencing a side effect from Vazotal?

A: If a side effect is suspected, prompt clinical review by a healthcare professional is necessary for guidance. Official regulatory bodies also encourage reporting all side effects.

Q: Is Vazotal a controlled substance?

A: Vazotal is classified as a prescription-only medicine, meaning it requires a prescription from a licensed professional. It is not listed as a controlled substance under the regulatory schedules of major government drug agencies.

Q: Can Vazotal affect my ability to drive or operate machinery?

A: Official warnings indicate that the ability to drive or operate machinery may be impaired while taking Vazotal. This caution is based on the known common side effects of dizziness, headache, and fatigue (somnolence), especially when first starting the treatment or after a dose change.

Q: What is the experience of stopping Vazotal treatment?

A: Vazotal is specifically designed as a long-acting agent for the maintenance therapy of chronic conditions. Therefore, cessation of treatment requires the direction of a healthcare professional, as the sustained therapeutic effect will diminish, potentially affecting the patient's condition.

Q: What is the shelf life of Vazotal?

A: According to regulatory stability data, Vazotal tablets typically have a shelf life of 2 to 3 years from the date of manufacture. The stated shelf life is dependent on the medicine being stored in the original, tightly closed container and kept under the recommended environmental conditions.

Q: Does Vazotal have generic versions available?

A: Yes, official drug regulatory records show that the active ingredient in Vazotal, Amlodipine, is available from multiple manufacturers. These products are known as generic versions, which are available in addition to the branded formulation.

Q: Are there any specific lab tests needed before starting Vazotal?

A: While there is no mandatory list of specific routine lab tests for all patients, the medicine's clearance is known to be affected by liver function. For patients with known hepatic impairment (liver issues), monitoring and potential dose adjustments are clinical matters that must be addressed by a healthcare professional.

Q: What does the term 'contraindication' mean in relation to Vazotal?

A: According to authoritative health resources, a contraindication is a specific reason, condition, or circumstance that makes the use of a particular treatment formally restricted. For Vazotal, contraindications are conditions where using the medicine is likely to cause harm to the patient.

Q: Is Vazotal safe to take while trying to conceive?

A: Studies have indicated that Amlodipine has not been reported to cause changes to fertility in animal models. Decisions about continued use during reproductive planning require consultation with a healthcare professional.

Q: What are the signs of an allergic reaction to Vazotal?

A: Regulatory safety information lists the signs of a serious allergic reaction, which may include sudden onset of wheezing, difficulty breathing, or the swelling of the face, lips, tongue, or throat. Severe skin reactions or rash are also noted as potential signs of hypersensitivity.

Q: Are there any known long-term effects of taking Vazotal?

A: The official safety data, including the list of adverse reactions and warnings, is collected and summarized from long-term clinical trials supporting the medicine's approval. Long-term side effects are reflected by the official safety profile.

Q: Is the research on Vazotal publicly available?

A: Yes, the key clinical research used to support the approval of Vazotal, including results from pivotal Phase III randomized controlled trials, is publicly available. These studies are cited and referenced within the official regulatory documents published by government agencies.

How should Vazotal be stored and disposed of?

How to Store and Dispose of Vazotal

The storage and disposal of Vazotal (Amlodipine) tablets must comply strictly with conditions specified in official regulatory labeling.

Requirement Condition
Storage Temperature Store at Controlled Room Temperature: 20°C to 25°C (68°F to 77°F).
Environmental Protection Keep in the original, tightly closed container and store away from excess moisture and light. Do not freeze.
Child Safety Store out of the sight and reach of children.
Disposal Instructions Dispose of unused or expired medicine via a formal drug take-back program. Do not flush Vazotal down the toilet or throw it away via wastewater.

These conditions ensure the stability of the medicine until its expiration date. If a take-back program is unavailable, regulatory guidelines advise mixing the medicine with an unappealing substance before discarding it in a sealed container with household trash.

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

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