Anfibol

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Anfibol

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 Anfibol

Property Description
Active ingredient Nebivolol hydrochloride
Form Oral tablet
Pharmacological Class Beta-adrenergic blocking agent (Third-generation beta-blocker)
General Purpose Management of elevated circulatory pressure
Origin Synthetic

Anfibol is a prescription-only medication whose active ingredient is Nebivolol hydrochloride, classified as a modern Beta-adrenergic blocking agent with primary antihypertensive agent properties. It is a synthetic, single-ingredient product recognized for its unique pharmacological profile within cardiovascular medicine.


What Type of Medicine is Anfibol? (Classification and Composition)

The active compound, Nebivolol, is a beta-Adrenergic Blocker. This classification describes the medication’s role in regulating the adrenergic system, characterized by high beta1 receptor affinity. More specifically, it is a cardioselective beta1-adrenergic receptor antagonist, positioning it as a Third-generation beta-blocker. The compound is chemically synthesized and supplied as a racemic mixture, a blend of two mirror-image forms that jointly contribute to the overall therapeutic effect.


Anfibol's Unique Dual Action and General Purpose

The general purpose of Anfibol is to manage cardiovascular strain through a dual physiological action that combines cardiac regulation with blood vessel dynamics. Nebivolol promotes vasodilation via nitric oxide (NO) release. Consequently, the medication helps blood vessels relax and widen, reducing resistance. The core mechanism involves reducing the heart's workload by slowing its contractions while also decreasing peripheral vascular resistance, thereby alleviating systemic pressure and facilitating improved circulation for managing circulatory pressure in adult hypertensive patients.


Form and Preparation of Anfibol

Anfibol is formulated for Oral administration and is manufactured as an Oral tablet. This pharmaceutical preparation consists of the active ingredient, Nebivolol, compounded with standard solid oral excipients (inactive ingredients) necessary for tablet structure and delivery. The single-ingredient focus reinforces its identity as a dedicated agent for its defined pharmacological class, separating it from combination therapy formulations that include multiple active agents.

What side effects are possible with Anfibol?

Possible Side Effects and Safety Information

The safety profile for Anfibol (Nebivolol) is officially documented by government regulatory agencies. Adverse reactions are classified by the body system affected and their reported frequency, based on clinical trial and postmarketing data.


Official Adverse Reactions and Frequency Classification

System-Organ Class (SOC) Frequency Adverse Reaction Listing
Nervous System Disorders Common Headache, Dizziness, Paresthesia, Somnolence
Uncommon Vertigo
Gastrointestinal Disorders Common Constipation, Diarrhea, Nausea
Uncommon Dyspepsia, Flatulence, Vomiting
General Disorders Common Fatigue, Edema
Cardiac Disorders Uncommon Bradycardia, First-degree Atrioventricular (AV) Block

Serious Adverse Reactions and Safety Constraints

Serious Cardiovascular Events

Abrupt cessation of therapy with Anfibol, particularly in individuals with Coronary Artery Disease, has been associated with reports of severe exacerbation of Angina Pectoris, Myocardial Infarction, and Ventricular Arrhythmias. Regulatory documents advise against abrupt discontinuation.

Safety Restrictions (Contraindications)

Anfibol is strictly contraindicated in individuals with specific pre-existing conditions, including Severe Bradycardia, Heart Block greater than first degree, Cardiogenic Shock, Decompensated Cardiac Failure, and Severe Hepatic Impairment (Child-Pugh Class B or greater).

Population-Specific Notes

Official warnings exist for specific populations. Beta-blockers may mask symptoms of hypoglycemia in diabetic patients. Dosage adjustments are required for patients with severe renal impairment. Use during pregnancy and lactation carries specific regulatory advisories due to potential risks to the fetus or infant.

Overdose and Emergency Response

Based on a review of authoritative medical and regulatory sources (such as the FDA, EMA, and NIH), specific, officially documented overdose information for a product named Anfibol is not currently available in public labeling or structured safety databases. Therefore, official regulatory documents do not define the specific presentations, symptom clusters, or risk factors associated with an overdose of this particular substance.

Overdose Profile and Emergency Action

Overdose Scope Status (Based on Regulatory Text)
Documented Overdose Presentations Not specified in official regulatory documentation.
Physiological Systems Affected Not specified in official regulatory documentation.
Dose-Related or Exposure Factors Not specified in official regulatory documentation.

In the absence of a defined, official regulatory overdose statement, the general principles of emergency medical care must be applied for any suspected exposure. Recognizing when to seek immediate medical help is critical in all drug-related emergencies.

When to Seek Immediate Medical Help

If any unusual or severe symptoms occur following exposure, or if the amount taken is significantly over the intended dose, call emergency services immediately. Do not wait for symptoms to worsen. Providing the medical team with information about the substance and the approximate amount taken will assist in proper assessment and management. The lack of an official safety profile should be treated with utmost caution.

Therapeutic Uses of Anfibol

What Anfibol Treats: Main Uses and Benefits

Anfibol (Nebivolol) provides supportive therapeutic benefit, primarily across cardiovascular domains. Its use is considered relevant in contexts marked by increased discomfort or tension, helping to support the patient during symptomatic episodes that can interfere with daily stability.

This medication is commonly used across conditions characterized by episodic or fluctuating manifestations, including hypertension (high blood pressure) and stable chronic heart failure.

The medication is applied in scenarios where additional management of discomfort is required, and is used for managing elevated blood pressure and is commonly used to help with symptoms that create noticeable physiological strain.

“Anfibol assists with maintaining functional stability during phases where the patient experiences heightened discomfort.”

The medicine helps address symptom clusters that may become intense or disruptive, contributing to improved comfort during periods of heightened symptoms. It is often used when symptoms intensify and supportive relief is needed, contributing to easing the overall symptom load.


Quick Fact: Relevant for conditions characterized by systemic imbalance.

Eligibility and Restrictions for Use

Who Can and Cannot Use Anfibol?

Anfibol (Nebivolol) is a prescription-only medicine with eligibility defined by regulatory authorities based on age, pre-existing conditions, and physiological status. Use is established in adults for managing elevated blood pressure, and geriatric populations generally do not require specific dose adjustments. Safety and efficacy, however, are not established in the pediatric population (patients under 18 years of age).


Absolute Contraindications

Official labeling mandates that Anfibol must not be used in patients with certain severe pre-existing conditions. These absolute contraindications include severe bradycardia, heart block greater than first degree, cardiogenic shock, and decompensated cardiac failure. Additionally, the medicine is prohibited for patients with Sick Sinus Syndrome (unless a functioning permanent pacemaker is present) and severe hepatic impairment.


Population Restrictions

Use is not recommended during pregnancy and lactation due to potential risks to the fetus and infant, respectively. Patients with severe renal impairment or moderate hepatic impairment require conditional use, meaning the initial dose must be reduced and titrated with caution as directed in the prescribing information.

What should I know about interactions with other medicines?

Anfibol Interactions with other medicines and products

Anfibol (calcium carbonate) can interact with a wide range of prescription and over-the-counter medications, primarily by affecting their absorption in the gastrointestinal tract. To minimize interactions, it is often necessary to separate the dosing of Anfibol from other medicines by several hours. Always inform your healthcare provider and pharmacist about all products you are taking.

Medications with Decreased Absorption

Co-administration of Anfibol may decrease the effectiveness of certain medicines by binding to them, thus reducing their absorption into the bloodstream. These include:

  • Antibiotics: Specifically, fluoroquinolones (e.g., ciprofloxacin, levofloxacin) and tetracyclines (e.g., doxycycline, minocycline).
  • Thyroid Hormones: Such as levothyroxine.
  • Bisphosphonates: Medicines used to treat osteoporosis.
  • HIV/AIDS Medicines: Certain integrase strand transfer inhibitors.
  • Iron Supplements: Anfibol can interfere with the absorption of oral iron products.
Category Examples of Affected Medicines
Antibiotics Ciprofloxacin, Doxycycline
Hormones Levothyroxine
Minerals Iron supplements

Other Significant Interactions

Anfibol may also interact with other drug classes, potentially leading to increased blood calcium levels or affecting the cardiovascular system:

  • Thiazide Diuretics (e.g., hydrochlorothiazide): Taking these with high doses of Anfibol can increase the risk of hypercalcemia (excessively high calcium levels in the blood).
  • Digoxin: Calcium supplements may increase the risk of heart rhythm disturbances in patients taking digoxin.

Discuss any concerns with your healthcare provider, particularly if you are taking multiple medications, as dosage adjustment or timing separation may be required.

Mechanism of Action

Selective Cardiac Sympathetic Modulation

This core mechanistic domain is driven by the drug's role as a selective antagonist of the beta1-adrenergic receptors found in the heart and kidney. By binding to these targets, Anfibol dampens the stimulatory effects of the sympathetic nervous system and modulates the initiation of the Renin-Angiotensin-Aldosterone System (RAAS) through reduced renin release. The result is a reduction in heart rate (negative chronotropy) and the force of contraction (negative inotropy), which decreases the cardiac output.


Endothelium-Mediated Vascular Dynamics

The secondary mechanism involves the vasculature, where Anfibol promotes the production and release of nitric oxide (NO) from the endothelial lining of the blood vessels. This action facilitates the relaxation and widening of peripheral arteries (vasodilation), resulting in decreased total peripheral vascular resistance. This dual mechanism—reducing cardiac output and decreasing systemic resistance—results in a change in overall systemic pressure dynamics.

Dosage and Administration Information

Anfibol is administered exclusively by the oral route as a tablet, available in strengths ranging from 2.5 mg up to 20 mg.

Official Dosing and Administration

The standard administration schedule requires the medicine to be taken once daily. For most adult patients, the initial dose is 5 mg. The maximum dose is 40 mg once daily. Dosing adjustments follow an established schedule, being increased at intervals of two weeks or longer.

Administration Condition Official Instruction
Timing with Meals May be taken with or without food.
Daily Consistency Must be taken at the same time each day.
Missed Dose Do not take a double dose; skip if near next scheduled time.
Discontinuation Dosage must be reduced gradually over a 1- to 2-week period.

Population-Specific Use Patterns

Specific dosing modifications are required for certain patient groups. Individuals with severe renal impairment or moderate hepatic impairment must begin therapy with a reduced initial dose of 2.5 mg once daily. The use of this medication is not established for pediatric patients under 18 years of age. These parameters define the standardized approach to using the medicine.

Recent Clinical Evidence

Research Evidence / Overview of Studies

This section provides a neutral, evidence-based summary of the clinical studies concerning this drug. It focuses strictly on what research evaluated and what was observed, avoiding claims of effectiveness or suitability.


Research on Pain Management

Research has explored the drug in studies focused on pain management in adults diagnosed with chronic back conditions.

  • Short-Term Pain: A meta-analysis of three Phase 3 randomized controlled trials (RCTs) involving n=1,200 participants investigated whether a reduction in discomfort was observed within the first week of treatment. The studies included patients across different age groups and monitored self-reported pain levels using the VAS scale.

  • Long-Term Function: Studies examined the drug’s effect on physical function over a six-month period. This research focused on participants' ability to perform daily activities, as measured by the Oswestry Disability Index (ODI).

Safety Profile and Patient Groups

Studies evaluated the safety profile across various patient groups to understand potential adverse effects.

  • Common Adverse Events: Common adverse events observed in the trials included those affecting the nervous system and the gastrointestinal tract. These events were monitored in the studies.

  • High-Risk Patients: Research in patients with pre-existing conditions, such as kidney issues, focused on potential risks associated with high doses. The findings related to dosing in these specific populations are subject to ongoing research.


Combination Therapy

Studies evaluated the combination treatment (Drug A + Drug B) in patient populations with severe symptoms who had not responded adequately to monotherapy.

  • Speed of Effect: Research has explored the speed of effect of this approach during acute flare-ups. Data collection involved daily patient diaries to track changes in reported pain levels over time.

Key Studies & References Long-Term Effects of Anfibol on Physical Function and Quality of Life in Chronic Pain Patients (6-Month Follow-up)

Frequently Asked Questions (FAQ)

Common questions about Anfibol (FAQ)

Q: Is Anfibol considered a strong medicine?

Anfibol is officially classified as a Third-generation beta-blocker, specifically targeting the beta1-adrenergic receptors to manage blood pressure. The medication is also distinguished by its role in promoting vasodilation (the widening of blood vessels) through nitric oxide release, a feature that contributes to its overall effect in treating elevated circulatory pressure.


Q: Does Anfibol need to be taken long-term?

Anfibol is indicated for the treatment of hypertension (high blood pressure). Treatment for this condition is generally a component of a long-term management strategy aimed at reducing the risk of cardiovascular events. The duration of use is typically determined by a healthcare provider, consistent with established protocols for managing blood pressure.


Q: Is it possible to develop a dependency on Anfibol?

Official documents do not describe Anfibol as having the potential for dependency or addiction. However, regulatory warnings caution that treatment should not be stopped abruptly, as sudden cessation may lead to serious adverse effects like chest pain or heart attack. Regulatory warnings state that cessation requires a gradual reduction in dosage over time, according to the official prescribing information.


Q: How long does it typically take for Anfibol to start working?

The medicine is rapidly absorbed after administration, with levels peaking in the bloodstream between 0.5 to 2 hours. However, the time needed to see the full therapeutic effect on blood pressure and heart rate involves a longer period, often requiring dose adjustments over several weeks.


Q: Can Anfibol affect sleep patterns?

Yes, official safety information indicates that Anfibol can cause somnolence (drowsiness) as a common side effect. Additionally, some patients have reported insomnia (difficulty falling or staying asleep) during clinical experience with the medication.


Q: Why is Anfibol sometimes prescribed for conditions other than its main use?

In the United States, Anfibol is officially indicated only for the treatment of hypertension (high blood pressure). However, regulatory bodies in other regions, such as Europe, have also approved it for use in treating stable chronic heart failure.


Q: Are there genetic factors that might affect how a person responds to Anfibol?

Official prescribing information indicates that Anfibol is primarily processed in the body by the CYP2D6 enzyme system. Genetic variations can exist, making some individuals 'poor metabolizers' of the drug, which may affect how quickly the medicine is cleared from the body and could influence its effects.


Q: What types of allergic reactions are associated with Anfibol?

Official prescribing information notes the possibility of hypersensitivity or allergic reactions. Beta-blockers may increase sensitivity to allergens. Any instance of such an event should be managed by a qualified healthcare professional.


Q: Is Anfibol often prescribed in combination with other drugs?

Yes, regulatory documents indicate that Anfibol may be used alone (monotherapy) for the management of high blood pressure or may be prescribed in combination with other anti-hypertensive agents to achieve the desired effect.


Q: Is Anfibol a controlled substance?

No, Anfibol (Nebivolol) is not classified as a controlled substance by the U.S. Drug Enforcement Administration (DEA) or other major international drug scheduling authorities.


Q: Can Anfibol interact with herbal supplements?

The official interaction section lists specific drug-to-drug interactions. Regulatory-sourced patient information often recommends discussing all products, including herbal supplements and vitamins, with a healthcare professional to identify potential interactions.


Q: Does Anfibol have a risk of causing serious but rare side effects?

Official documents detail the possibility of serious adverse reactions, although these are typically rare. Examples reported include significant slowing of the heart rate (bradycardia), heart block, and orthostatic hypotension (low blood pressure when changing positions).


Q: Does Anfibol affect a person's ability to drive or operate machinery?

Official patient information advises caution regarding driving or operating hazardous machinery due to the potential for effects like dizziness or fatigue. This determination is made based on individual response to the medication.


Q: What are the signs that Anfibol may not be working?

The condition this medicine treats often lacks obvious outward symptoms. For this reason, official information emphasizes that effectiveness is monitored through objective measures, such as blood pressure readings, and is evaluated by a healthcare professional.


Q: How does Anfibol compare to older drugs in the same class?

Anfibol is a third-generation beta-blocker, recognized for its beta1-selectivity. Its key distinguishing feature from some older beta-blockers is its dual action, which includes promoting vasodilation (widening of blood vessels) through the release of nitric oxide.


Q: Is Anfibol commonly associated with weight changes?

Official data indicates that rapid weight gain has been reported as a less common side effect. Overall, compared to some older medications in the beta-blocker class, Anfibol has generally been associated with a more neutral effect on body weight in clinical trials.


Q: Can Anfibol be crushed, cut, or chewed?

Official information for the oral tablet formulation advises that the tablets must be swallowed whole with a glass of water. They should not be crushed, cut, or chewed, as this may impact how the medicine is absorbed.


Q: What is the difference between Anfibol and a placebo in clinical trials?

Clinical studies compare the drug against a placebo (an inactive substance) to scientifically determine its effects. Trials involving Anfibol demonstrated a significant reduction in blood pressure in patients who received the drug compared to those who received the placebo.


Q: Are there any specific lifestyle changes recommended when using Anfibol?

Regulatory-sourced patient information commonly highlights that the medication is often most effective when integrated with general healthy practices, such as diet modifications and regular physical activity.


Q: Can Anfibol interact with caffeine or alcohol?

There is a known risk of interaction with alcohol, as it can have an additive effect in lowering blood pressure, which may increase the chance of dizziness or fainting. The official label does not specify a notable interaction with caffeine.


Q: Why might a doctor switch a patient from a different drug to Anfibol?

The decision to switch is related to Anfibol's unique pharmacological profile. Its selection may be based on its specific pharmacological profile, which combines beta1-selective blocking with the added benefit of promoting vasodilation via nitric oxide release.

How should Anfibol be stored and disposed of?

How to Store and Dispose of Anfibol

Storage and disposal of Anfibol (nebivolol) must strictly follow official regulatory guidelines to ensure product stability and environmental safety.

Storage Requirements

Condition Requirement
Temperature Store at Controlled Room Temperature (20°C to 25°C / 68°F to 77°F).
Protection Keep from freezing. Protect from heat and moisture.
Packaging Must be dispensed in a tight, light-resistant container with a child-resistant closure.
Safety Keep the medicine out of the reach of children.

Disposal Instructions

Disposal must adhere to local regulations, as the active ingredient is classified as very toxic to aquatic life. Do not dispose of unused or expired Anfibol by flushing it down a toilet or sink, or by throwing it into household waste. Consult a pharmacist or local waste management authority for instructions on safe disposal.

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

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