Berotec N

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Berotec N

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Method of action: Bronchodilator, Tocolytic

Medically reviewed

Laura Arias

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 Berotec N

Berotec N is a prescription-only medicine designed to provide rapid relief from breathing difficulties. Its identity, composition, and purpose are defined by its active component and method of delivery.

Property Description
Active ingredient Fenoterol hydrobromide
Form Pressurized inhalation solution
Pharmacological class Selective beta2-adrenergic agonist
General purpose Rapid relief of airway constriction
Origin Synthetic

Berotec N: Classification and Core Identity

The active ingredient in Berotec N is Fenoterol hydrobromide, a synthetic compound classified as a selective beta2-adrenergic agonist. This places it within the broader group of bronchodilators. Fenoterol is a clinically recognized agent whose efficacy and quick onset of action are supported by pharmacological studies. This means the drug is recognized globally for its function in helping to widen the breathing passages during acute episodes.

The Delivery System and Composition

Berotec N is formulated as a pressurized inhalation solution and administered via a metered-dose inhaler (MDI), which ensures targeted delivery through the inhalation route. This is a single active ingredient preparation, containing only Fenoterol hydrobromide combined with an aqueous-alcoholic solution base required for aerosolization. The MDI is a widely used system due to its portability and the consistent delivery of the active substance directly to the site of action.

General Purpose of the Fast-Acting Bronchodilator

The primary function of Berotec N is to serve as a rescue medication for immediate action, providing rapid relief from the symptoms of constricted airways. Fenoterol, like other SABAs, quickly facilitates bronchodilation, restoring airflow during acute events. The key benefit is its ability to swiftly counter the spasm of the airways, providing rapid symptomatic relief when breathing becomes difficult due to reversible airway obstruction.

Regulatory References

  1. Quick-Relief Asthma Medicines (MedlinePlus)

What side effects are possible with Berotec N?

Possible Side Effects and Safety Information

Official regulatory documents classify the possible adverse effects of Berotec N (Fenoterol hydrobromide) based on their observed frequency and the physiological system affected. The safety profile is structured to clearly define both common effects and rare, serious reactions, while also establishing limitations for use.


Frequency-Classified Adverse Reactions

The most Common adverse reactions documented in official labeling include tremor, headache, cough, and throat irritation. Less frequent reactions classified as Uncommon include tachycardia and nausea.

Effects reported as Rare or with a Not Known frequency include cardiac events like palpitations and arrhythmias, as well as systemic effects such as hypersensitivity reactions, muscle cramps, and urinary retention.

System-Organ Classifications

Adverse reactions are grouped into System-Organ Classes (SOCs). Key systems involved include Nervous System Disorders (e.g., tremor, headache), Cardiac Disorders (e.g., tachycardia, palpitations), and Metabolism and Nutrition Disorders, which may involve a potentially serious decrease in serum potassium (hypokalaemia).

Serious Safety Considerations

The regulatory safety profile highlights serious adverse reactions, notably paradoxical bronchospasm, a rare but severe reaction requiring immediate discontinuation of therapy. Rare occurrences of myocardial ischaemia have been noted with the use of beta-agonists. Furthermore, the medicine is formally contraindicated (prohibited) in individuals with specific pre-existing heart conditions, including hypertrophic obstructive cardiomyopathy and tachyarrhythmia.

Population-Specific Notes

Safety statements advise caution in specific patient populations, such as those with pre-existing heart or vascular disorders or diabetes mellitus. For pregnancy, the drug may exhibit an inhibitory effect on uterine contractions, and the active ingredient is known to be secreted into breast milk.

Overdose and Emergency Response

Officially Documented Overdose Manifestations

Overdose of Fenoterol hydrobromide, the active component of Berotec N, is defined by regulatory agencies as an exaggeration of the drug's known pharmacological effects, resulting in excessive beta-adrenergic stimulation.

The documented clinical signs include tachycardia (rapid heartbeat), palpitations, tremor, restlessness, headache, nausea, and dizziness. Over-exposure may also lead to changes in blood pressure, specifically an increase in systolic pressure and a fall in diastolic pressure.

Documented Complications and Monitoring

Supratherapeutic doses are associated with potentially serious metabolic disturbances, including the risk of hypokalaemia (low serum potassium levels) and hyperglycaemia (high blood sugar). Due to these risks, regulatory guidance mandates that serum potassium levels should be monitored in cases of suspected overdose. High doses also carry the potential for cardiovascular effects, such as QTc prolongation.

Emergency Actions Mandated by Regulation

If overdose is suspected, immediate medical attention must be sought, and the individual should contact a poison control center or emergency room immediately. Treatment is primarily supportive and symptom-oriented. When specific therapy is considered necessary, cardioselective beta-blockers are described as the preferred agent, to be administered under strict medical supervision.

Therapeutic Uses of Berotec N

What Berotec N Treats: Main Uses and Benefits

The active component, fenoterol, is relevant for the treatment of asthma and is used as a bronchodilator for the management of reversible airway obstruction. This aligns with its primary therapeutic purpose.

The medication is generally used across conditions characterized by periods of heightened symptoms, primarily bronchial asthma and the reversible airway components of Chronic Obstructive Pulmonary Disease (COPD), which includes chronic bronchitis and pulmonary emphysema. It is applied in addressing these domains where additional symptomatic support is needed, which contributes to easing the overall symptom load associated with these respiratory conditions.

Berotec N is generally relevant for managing symptom clusters that may become intense or disruptive, such as acute shortness of breath (dyspnoea), wheezing, and chest tightness. It is commonly used when groups of symptoms appear suddenly, and it offers symptomatic relief that helps patients cope more steadily with difficult episodes. It may assist with maintaining functional stability when symptoms interfere with routine activities.

It is considered relevant in specific clinical settings for prophylaxis, such as contexts involving heightened symptoms due to physical activity.

Quick Fact: Relief for Acute Airway Symptoms
Relevant Use: Symptomatic relief for reversible airway obstruction in conditions like asthma and COPD.
Core Benefit: Provides supportive relief when symptoms intensify, assisting with maintaining functional stability.

Eligibility and Restrictions for Use

Official Eligibility Rules for Berotec N (Fenoterol)

The population eligibility for Berotec N is defined by official regulatory documents, establishing groups that are absolutely prohibited from use and groups that require special medical caution.


Absolute Contraindications

The medicine must not be used by patients with the following conditions, as they are designated as absolute non-eligibility criteria in the regulatory label:

  • Hypertrophic obstructive cardiomyopathy
  • Tachyarrhythmia (abnormally fast or irregular heart rhythms)
  • Known hypersensitivity to fenoterol hydrobromide or any of the product's excipients.

Conditional Use and Restrictions

Use requires special caution and a careful risk/benefit assessment in individuals with severe organic heart or vascular disorders, recent myocardial infarction, hyperthyroidism, phaeochromocytoma, or insufficiently controlled diabetes mellitus.

Age and Physiological Status:

  • Adults and Children are generally eligible for use in managing reversible airways obstruction.
  • Pregnancy: The usual drug precautions apply, especially during the first trimester. The inhibitory effect on uterine contraction must be considered.
  • Lactation: The safety in breast-fed infants has not been established, as fenoterol is known to be excreted into breast milk.

Eligibility is not formally limited by renal or hepatic impairment in the official prescribing information reviewed.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory documents specify several interaction patterns for Berotec N (Fenoterol hydrobromide), which are primarily classified based on their pharmacodynamic effects and the potential for potentiating systemic adverse events. The interaction structure necessitates specific restrictions or requirements for caution when co-administered with certain categories of medicinal products.

Official Interaction Statements:

  • Beta-blockers (particularly non-selective agents) may inhibit the bronchodilatory effect of Fenoterol and can produce severe bronchospasm. Co-administration is formally restricted due to this critical pharmacodynamic conflict.
  • Other Adrenergic Drugs and Sympathomimetics should be used with caution as co-administration may potentiate cardiovascular effects.
  • Monoamine Oxidase Inhibitors (MAOIs) and Tricyclic Antidepressants (TCAs) may enhance the action of the beta2-agonist on the cardiovascular system.
  • Anticholinergic Agents may interact additively with Fenoterol, which may increase bronchodilation and the risk of unwanted effects.
  • Xanthine Derivatives, Corticosteroids, and Diuretics may potentiate hypokalemia or associated ECG changes resulting from beta2-agonist therapy.
  • Halogenated hydrocarbon anaesthetics can increase the susceptibility on the cardiovascular effects of beta2-agonists.

The overall interaction profile is structured by these known effects of a beta2-adrenergic agent, focusing on interactions that either oppose the intended therapeutic outcome or elevate the risk of a systemic adverse effect, as defined by government health authorities.

Mechanism of Action

How Berotec N Works

The active compound in Berotec N acts as a selective beta2-adrenergic receptor agonist. This mechanism involves the molecule binding directly to the beta2 receptors located primarily on the airway smooth muscle cells.

Receptor activation initiates the G-protein signaling cascade, which leads to the stimulation of the enzyme adenylyl cyclase. This stimulation rapidly increases the intracellular concentration of the second messenger, cyclic AMP (cAMP), within the muscle cells .

The elevated cAMP levels activate Protein Kinase A, which mediates phosphorylation events. This process ultimately reduces the concentration of free intracellular calcium necessary for muscle contraction, resulting in the relaxation of airway smooth muscle tone. This physiological action directly produces the widening of the bronchial passages and an increase in airflow conductance through the respiratory system.

Dosage and Administration Information

Official Administration Guidelines

The usage protocol for Berotec N is defined by standard guidelines, emphasizing its role as an on-demand inhalation solution. The active ingredient, Fenoterol hydrobromide, is administered via a metered-dose aerosol (MDI) device.


Administration Scope

Route of Administration Inhalation, delivered via the metered-dose aerosol (MDI) device.
Dosing Schedule (Acute Use) 1 puff for immediate relief; a second puff may be taken if no relief is noted after 5 minutes.
Prophylaxis Dosing 1 to 2 puffs are the specified dose when administered prior to physical exertion.
Maximum Daily Limit The total dosage must not exceed 8 puffs within a 24-hour period.
Age-Group Rules Administration to children requires medical advice and must be performed under the supervision of an adult.

Procedural Requirements

Preparation requirements dictate that the valve must be depressed twice (primed) before the first use and once (re-primed) if the inhaler has not been used for three days or more. The dose is released by pressing the canister while simultaneously inhaling deeply and steadily through the mouthpiece. Following administration, the breath should be held for a few seconds.

Special Conditions include the mandatory use of the mouthpiece supplied with the product and replacing the aerosol after the labeled number of doses (typically 200 puffs), as dose accuracy cannot be guaranteed beyond this point.

This protocol establishes the standardized, short-term, intermittent use of the medicine, strictly limiting the maximum daily intake and requiring specific procedural steps to ensure proper delivery of the 100 microgram dose.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Berotec N

Evidence for Rapid Relief in Acute Bronchial Constriction

Research for Berotec N was studied for use in conditions characterized by episodes of acute breathing difficulty, such as those experienced during asthma attacks. Researchers have commonly conducted randomized controlled trials (RCTs) using designs that compare the medicine against a placebo or other similar inhaled treatments. These studies have primarily monitored outcomes related to systemic or functional imbalance, such as the Forced Expiratory Volume in one second ( FEV1) and Peak Expiratory Flow (PEF).

The data from these controlled studies have described patterns of shifts in physiological measurements, reporting that the function was observed to shift within minutes of inhalation. Furthermore, trials monitored responses over defined time intervals, with reported patterns observed over defined time intervals. This evidence contributes to understanding symptom patterns during acute periods, but research provides context but not individual predictions of whether an individual will respond similarly in a real-world episode.

Evidence for Symptomatic Management of Chronic Conditions

Research has been studied for use in conditions characterized by fluctuating or episodic manifestations, such as long-term bronchial asthma and Chronic Obstructive Pulmonary Disease (COPD). These studies typically use longer follow-up periods, often extending for several weeks or months. Findings described patterns observed in the studies where lung function was monitored over these intermediate timeframes, and research highlights changes measured during the study period.

Long-Term Data and Extended Follow-up

While some longer clinical trials research describes follow-up periods of up to 12 weeks, the focus of these extended studies was evaluated in comparing different delivery methods or formulations, rather than to investigate long-term disease progression. Consequently, long-term effects are not fully established by the existing research base. Research does not fully establish a relationship between the use of this short-acting medicine and major outcomes, such as rates of severe asthma exacerbations or changes in overall lung function over many years.

Research in Special Populations

Research has been studied for the use of the medicine in certain patient groups, most notably children with asthma. Studies that included younger populations explored short-term symptom changes and physical discomfort, and data show patterns related to physiological outcomes in these groups. However, data for certain groups remain insufficient, meaning the results apply only to the populations studied and research provides context but not individual predictions for all possible subgroups.

How should Berotec N be stored and disposed of?

Storage and Disposal Requirements for Berotec N

Berotec N (fenoterol hydrobromide) metered aerosol must be stored according to strict regulatory guidelines to maintain its integrity and safe handling.

Official Storage Conditions

Requirement Description
Temperature Limit Do not expose the pressurized container to temperatures above 50°C. Store away from heat and hot surfaces.
Environmental Protection Protect the product from direct sunlight and moisture.
Child Safety Keep out of the reach and sight of children.
Handling Do not open the container by force or incinerate it, even when empty. The canister and mouthpiece must not be interchanged with other metered aerosols.

Disposal Instructions

Unused medicine must be discarded following local regulations. Due to environmental hazards, contaminated fire residues and water must not be discharged into drains.

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

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