Euphyllinum

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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 Euphyllinum

What is Euphyllinum? Defining the Bronchodilator

Property Description
Active Ingredient Aminophylline (Theophylline Ethylenediamine)
Pharmacological Class Methylxanthine Bronchodilator
Forms Tablets, Injection Solution, Suppositories
General Purpose Smooth Muscle Relaxation, Airway Widening
Origin Synthetic Derivative

Euphyllinum is a prescription-only medication whose active component, Aminophylline (INN), is classified as a potent methylxanthine bronchodilator and smooth muscle relaxant. This pharmacological designation is clinically recognized for its essential benefit in alleviating acute respiratory discomfort. The drug acts as an antiasthmatic agent intended for systemic use, meaning the active substance is designed to circulate throughout the body after administration. Aminophylline is a synthetic derivative that is chemically formulated to optimize the therapeutic delivery of its parent compound, Theophylline.


Aminophylline Composition and Forms

The defining feature of this medication is its active ingredient, Aminophylline, which is a complex salt formed by combining Theophylline with Ethylenediamine in a 2:1 ratio. This molecular structure is a key differentiator, as the addition of Ethylenediamine significantly enhances the solubility and stability of the compound. Euphyllinum is considered a single-substance product and is available in forms designed for systemic delivery, including oral tablets, solutions for parenteral injection (for rapid effect), and suppositories (rectal route).


What is the General Therapeutic Purpose?

The general therapeutic purpose of Euphyllinum is to effectively counter the physical constriction of airways. Its action provides the systemic benefit of smooth muscle relaxation, leading directly to bronchodilation. This effect is crucial for widening the constricted air passages, thereby promoting easier breathing and providing relief from the symptom of airway tightness typically associated with various respiratory conditions.

Regulatory References

  1. Aminophylline - StatPearls - NCBI Bookshelf

What side effects are possible with Euphyllinum?

Possible Side Effects and Safety Information

Euphyllinum, which contains Theophylline, has a narrow therapeutic window, meaning that the margin between an effective dose and a dose causing adverse reactions is small. The frequency and severity of side effects typically increase as the blood concentration of the drug exceeds 20 micrograms per milliliter ( mcg/mL). The use of this medicine requires careful monitoring of serum concentrations.


Common and Serious Adverse Reactions

Commonly documented side effects involve the gastrointestinal and nervous systems. These include nausea, vomiting, diarrhea, headache, insomnia (trouble sleeping), restlessness, irritability, and muscle tremors.

Serious and clinically significant adverse reactions are typically associated with elevated drug levels. These reactions can be life-threatening and include seizures (convulsions), severe or persistent vomiting, and serious cardiac arrhythmias (irregular heartbeats), such as ventricular arrhythmias and tachycardia. Other signs of severe toxicity may include hypokalemia (low potassium level) and hyperglycemia (high blood sugar).


Safety Considerations and Restrictions

Contraindications include a known hypersensitivity or allergy to theophylline or other xanthine derivatives. Caution is required in patients with a history of or current peptic ulcers, seizure disorders, or pre-existing heart rhythm problems (excluding bradyarrhythmias), as Theophylline may exacerbate these conditions.

Population-Specific Safety: The drug's clearance can be slower in the elderly and in patients with certain conditions such as congestive heart failure, liver disease, or high fever, increasing the risk of adverse effects. Children younger than one year of age are also more susceptible to serious side effects. The drug is considered a Pregnancy Category C risk.

Safety Monitoring: Due to the concentration-dependent nature of toxicity, regular measurement of serum theophylline concentration is required to guide safe dosing. Clinical monitoring of central nervous system effects (headache, irritability), heart rate, and electrolyte balance is also necessary during therapy.

Overdose and Emergency Response

Overdose: Euphyllinum (Aminophylline/Theophylline)

Overdose with Euphyllinum, which contains theophylline, can be serious and potentially life-threatening. The most critical and severe manifestations are typically seizures and significant cardiac dysrhythmias (irregular heartbeats), which may be refractory to standard treatment.

Clinical Manifestations

Initial and less severe symptoms of toxicity frequently involve the gastrointestinal and nervous systems, and may include nausea, vomiting (sometimes with blood), diarrhea, headache, anxiety, irritability, and tremor. As toxicity progresses, more serious effects on the cardiovascular system can occur, such as tachycardia (rapid heart rate), palpitations, and hypotension (low blood pressure), alongside profound metabolic disturbances like hypokalemia (low potassium) and hyperglycemia.

When to Seek Help

Immediate medical attention is required for any suspected overdose. Seek emergency medical care right away if someone has taken more than the prescribed dose or is exhibiting any symptoms of toxicity, especially seizures or irregular heartbeats. Timely medical intervention and supportive care are crucial to manage the effects and prevent severe complications. Professional guidance from a poison control center or emergency room staff should be sought without delay.

Therapeutic Uses of Euphyllinum

What Euphyllinum Treats: Main Uses and Benefits

Euphyllinum (Aminophylline), an established therapeutic agent, is used to help manage symptoms associated with difficulty breathing and airway restriction in the lungs. This medication is applied across several therapeutic domains where additional symptomatic support is needed and is relevant for managing symptomatic discomfort.

This agent is commonly used in conditions characterized by periods of heightened symptoms such as asthma, Chronic Obstructive Pulmonary Disease (COPD), Chronic Bronchitis, and Emphysema. It helps address symptom clusters that may become intense or disruptive, including acute chest tightness and wheezing experienced during flare-ups.

“It is relevant for easing symptoms related to difficult breathing when chronic manifestations intensify.”

The medication is also applied in a specialized clinical context for treating Apnea of Prematurity, a breathing disorder observed in premature infants. Used in clinical settings that involve acute or unstable symptom patterns, it may assist with easing the patient's discomfort during symptomatic phases and helps improve day-to-day comfort during symptomatic periods.


Symptomatic Focus: Respiratory Distress

  • Symptom Focus: Helps manage wheezing, chest tightness, and acute shortness of breath (dyspnea).
  • Use Scenarios: Used in acute settings for managing severe symptomatic discomfort and is considered relevant for easing symptoms in chronic conditions.
  • General Benefit: Provides supportive relief when symptoms interfere with routine comfort.

Regulatory References

  1. NIH MedlinePlus overview of Aminophylline

Eligibility and Restrictions for Use

Who Can and Cannot Use Euphyllinum (Aminophylline)

Regulatory documentation defines strict eligibility rules for Euphyllinum use. Absolute exclusion, or contraindication, applies to patients with known hypersensitivity to aminophylline, theophylline, other xanthines, or the excipient ethylenediamine. It is also contraindicated for patients with acute porphyria or those concurrently receiving other xanthine-containing drugs.

Population Group Eligibility Status (Regulatory Statement)
Infants (< 6 months) Not recommended or contraindicated (especially IV use).
Pregnancy Use not established as safe; reserved for essential clinical need.
Lactation Not recommended; theophylline is distributed into breast milk.
Older Adults Requires special caution and reduced dosage due to decreased clearance.

Conditional use requiring extreme caution and serum level monitoring applies to patients with hepatic dysfunction (e.g., cirrhosis), cardiac failure, severe hypoxemia, acute febrile illness (fever ge 38.9 C), and in smokers. Caution is also required for patients with active peptic ulcer, seizure disorders, or coronary artery disease.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for Euphyllinum (Aminophylline/Theophylline) is predominantly defined by its metabolism, which is sensitive to co-administered substances. The primary risk involves alterations in its clearance rate, which directly modifies the systemic plasma concentration.

Documented Exposure-Altering Interactions

Theophylline clearance is highly dependent on hepatic enzymes, mainly CYP1A2 and CYP3A4. Interactions are formally documented based on whether they increase or decrease the drug's exposure:

Interaction Type Examples of Documented Substances Effect on Theophylline Concentration
Reduced Clearance Cimetidine, Ciprofloxacin, Clarithromycin, Allopurinol Increases plasma concentration (risk of toxicity)
Increased Clearance Phenytoin, Rifampicin, Carbamazepine, Tobacco Smoking Decreases plasma concentration (risk of reduced efficacy)

Contraindications and Pharmacodynamic Effects

Co-administration with Riociguat is formally contraindicated due to the risk of additive hypotensive effects. Other documented pharmacodynamic interactions include an increased risk of toxicity when combined with other xanthine derivatives, and antagonism of sedation from benzodiazepines. Administration for specific diagnostic tests, such as those involving Dipyridamole, requires a 24-hour separation period.

Non-Medicinal Modulators

Official regulatory documents note that the use of tobacco or marijuana smoking significantly increases Theophylline clearance. Similarly, certain diets and products like St. John's Wort are documented to alter the drug's metabolic rate, requiring professional consideration.

Mechanism of Action

How Euphyllinum Works

Euphyllinum's action is mediated by Theophylline, which engages three distinct mechanistic domains. The primary pathway involves the non-selective inhibition of Phosphodiesterase (PDE) enzymes, notably PDE3 and PDE4. By inhibiting PDE, Theophylline increases the intracellular concentration of the second messenger cyclic Adenosine Monophosphate (cAMP). This rise in cAMP initiates a cascade that culminates in the reduction of intracellular calcium ions, leading to the physiological consequence of bronchial smooth muscle relaxation.

A separate mechanism involves the non-selective antagonism of Adenosine Receptors throughout the body. This antagonism prevents endogenous Adenosine from binding and exerting its effect, which reinforces smooth muscle relaxation and influences the systemic stimulation of the central nervous system. Lastly, Theophylline promotes the activity of the nuclear enzyme Histone Deacetylase 2 (HDAC2). This action suppresses the transcription of pro-inflammatory genes, resulting in the reduction of biological airway hyperresponsiveness.

Dosage and Administration Information

How to Use Euphyllinum: Official Administration Guidelines

Euphyllinum (Aminophylline) administration is strictly defined by regulatory documents, emphasizing the necessity of individualizing the dose based on therapeutic drug monitoring (TDM) to maintain serum theophylline concentrations within a specific range. This agent is used across two main administration types: intravenous (IV) for acute symptom management and oral for long-term maintenance.


Administration Routes and Schedules

Administration Type Dosage Pattern Key Constraint
Intravenous (IV) Initial loading dose (5.7 mg/kg Aminophylline) administered over 30 minutes, followed by continuous infusion. Requires continuous monitoring in a supervised, typically hospital, setting.
Oral Multiple daily doses (e.g., Q12h) for extended-release forms, or more frequently for immediate-release forms. Tablets must be swallowed whole and not crushed, broken, or chewed to preserve the intended release profile.

Procedural and Population-Specific Rules

For acute IV use, the dose must be calculated using the patient’s ideal body weight. The infusion rate must not exceed 25 mg of Aminophylline per minute. This route is typically followed by frequent serum measurements to guide adjustments, which are mandatory to prevent accumulation.

Population-specific dose reductions are required for certain patient groups. Older adults (over 60 years) and those with concurrent conditions that decrease drug clearance, such as hepatic impairment or cardiac decompensation, must receive a substantially lower maintenance infusion rate than healthy adults. Oral formulations should be taken consistently with respect to meals to maintain steady absorption.

Recent Clinical Evidence

Evidence for Use in Acute Asthma Exacerbations

Research has explored the use of Euphyllinum (Aminophylline) as an agent evaluated alongside standard care during acute flare-ups of asthma in adults and children. Short-term Randomized Controlled Trials (RCTs) monitored outcomes like lung function and healthcare utilization metrics, such as hospitalization rates. While some studies reported early measurements of change in lung function, findings were mixed and inconsistent regarding the major outcomes across meta-analyses, meaning certainty remains low regarding the consistency of reported findings for preventing hospital admission.

Evidence for Use in Apnea of Prematurity

The established evidence base, including numerous RCTs and meta-analyses, has explored the use of this agent for treating or preventing Apnea of Prematurity (AOP) in premature infants. Studies monitored functional imbalance, reporting patterns related to fewer apnea episodes being observed and a shorter overall duration of time infants needed mechanical respiratory support. However, contemporary data primarily compares Aminophylline to another methylxanthine (caffeine), creating limited direct comparison to a modern placebo.

Evidence for Use in Acute COPD Exacerbations

Research has explored the use of Euphyllinum during acute flare-ups of Chronic Obstructive Pulmonary Disease (COPD); these studies generally involve a smaller number of RCTs focused on adult populations with severe, refractory exacerbations. Researchers examined physiological measures, such as changes in arterial blood gas parameters. Data show patterns related to length of hospital stay that were inconsistent and frequently did not differentiate from the control groups.

Summary of Research Scope and Limitations

Across all indications, the follow-up durations were limited, with most data focusing on acute, short-term responses; research exploring long-term outcomes is not well established. Evidence for children with asthma and infants with AOP is described, but research specifically isolating outcomes in the older adult population remains insufficient. Research highlights that a primary uncertainty is the inconsistency of findings across trials, which reflects the specific populations studied.

Key Studies & References

  1. Comparative efficacy and safety of caffeine citrate and aminophylline in treating apnea of prematurity: A systematic review and meta-analysis

Frequently Asked Questions (FAQ)

Common questions about Euphyllinum (FAQ)

Q: Do older adults react differently to Euphyllinum compared to younger patients?

Official product information indicates that Theophylline clearance (the rate at which the body removes the drug) is often decreased in older adults (age 60 or older). This change can lead to higher-than-expected drug concentrations in the blood, which increases the risk of side effects. Due to this difference in clearance, reduced maintenance dosing and frequent serum monitoring are often necessary in this population to manage risk.


Q: How long does Euphyllinum stay in your system after you stop taking it?

the time Euphyllinum (Theophylline) stays in the body is highly variable and depends on its elimination half-life. This can range from a few hours in some healthy adults to over 18 hours in patients with conditions like heart failure or liver impairment. Official information focuses on the highly variable elimination half-life, which determines how quickly the drug is processed.


Q: What is the difference in effect between Euphyllinum tablets and an injectable form?

The injectable form (IV) is intended to rapidly achieve therapeutic drug levels for managing acute, severe symptoms, generally requiring a supervised setting. The oral (tablet) form is designed for long-term, chronic maintenance therapy to control breathing issues over time.


Q: Do pediatric patients use Euphyllinum, and if so, are there specific concerns?

Yes, Euphyllinum can be used in pediatric patients, but it requires special care. Regulatory documents state that children younger than one year of age are more susceptible to serious side effects. Due to highly variable clearance rates, dose adjustments and close monitoring of the drug’s blood concentration are important considerations for all pediatric age groups.


Q: Can Euphyllinum interact with common medications for high cholesterol or diabetes?

Theophylline’s metabolism in the liver can be affected by many other medications, including those used for chronic conditions, which can alter its concentration in the bloodstream. While specific cholesterol or diabetes drugs may not be individually listed, interactions with this class of drugs are possible and require professional consideration, as the drug’s effectiveness or safety may be altered.


Q: Can I take Euphyllinum with food, or does it need to be on an empty stomach?

For most immediate-release forms of theophylline, official information states that taking the medication with food or antacids does not usually impact the drug's absorption in a significant way. However, some extended-release formulations may have their absorption altered if taken with a high-fat meal.


Q: What's the difference between the immediate-release and extended-release forms of Euphyllinum?

The key difference is the speed of absorption. The immediate-release form is designed to enter the bloodstream quickly, resulting in a rapid peak concentration. The extended-release form is designed to release the drug slowly over time, providing a more stable and longer-lasting effect with less frequent dosing for maintenance therapy.


Q: Does Euphyllinum help with bronchitis or just asthma?

Theophylline is indicated for managing symptoms and reversible airflow obstruction associated with chronic asthma and other chronic lung diseases. These other diseases specifically include both chronic bronchitis and emphysema.


Q: Are there any specific warning signs I should look for regarding a Euphyllinum overdose?

The serious adverse reactions associated with high drug levels can be considered warning signs. These include severe or persistent vomiting, seizures (convulsions), and life-threatening cardiac arrhythmias (irregular heartbeats). These signs usually appear when the blood concentration of the drug is too high.


Q: How does body weight influence the way Euphyllinum is metabolized?

For the intravenous (IV) form of the drug, the dose calculation is based on the patient’s ideal body weight. This is because the drug's distribution is proportional to lean body mass, and using ideal body weight helps ensure the correct starting dose is administered to manage potential risks.


Q: Is it safe to drive while taking Euphyllinum?

Because Euphyllinum can cause side effects that affect the central nervous system (CNS), such as dizziness, restlessness, and irritability, it is important to be aware of how the medication affects personal abilities. For this reason, patients often observe their reaction to the medication before engaging in activities like driving or operating complex machinery.


Q: What research shows the safety profile of Euphyllinum in the long term?

Official research summaries note that the majority of clinical studies focus on acute, short-term responses to the drug. Information detailing the long-term safety and outcomes is not well established. Due to this data limitation, close monitoring for concentration-dependent adverse effects remains an important consideration during chronic therapy.


Q: Does Euphyllinum affect mental clarity or concentration?

Official safety information lists central nervous system (CNS) side effects such as restlessness and irritability. While these are not specifically described as problems with clarity, they are forms of CNS stimulation that could potentially interfere with a person's concentration.


Q: Can Euphyllinum be used for exercise-induced bronchospasm?

Theophylline is indicated for the treatment of symptoms associated with chronic asthma. For some patients, this use can include managing exercise-induced bronchospasm as part of their overall, ongoing maintenance regimen.


Q: Can I use Euphyllinum if I have a history of seizures?

Caution is required for people with a history of seizure disorders, as official product labeling indicates theophylline may exacerbate these conditions. Furthermore, seizures are a serious adverse reaction linked to high drug levels.


Q: Is Euphyllinum considered a maintenance medication or a rescue treatment?

It can be used for both. The oral form is typically used for long-term maintenance of chronic lung diseases. The intravenous (IV) form is used to rapidly manage severe symptoms and acts as a short-term rescue treatment.


Q: What is the typical duration of the effect after one dose of Euphyllinum?

The duration of effect depends on the formulation. Immediate-release forms act quickly and for a shorter period. Extended-release forms are designed for a longer-lasting therapeutic effect, which is why they are often prescribed to be taken every 12 hours (Q12h) for sustained therapy.


Q: Can Euphyllinum affect the effectiveness of birth control pills?

Yes, regulatory documents indicate a potential interaction. Estrogen-containing oral contraceptives have been documented to decrease the clearance of theophylline from the body. This interaction may lead to increased theophylline concentrations, which is an important consideration when determining dosing.


Q: Can Euphyllinum be used during pregnancy or breastfeeding?

Use during pregnancy is assigned a Category C risk, meaning it is reserved for essential clinical need and only after careful professional evaluation. The drug is generally not recommended during lactation because theophylline is known to be distributed into breast milk.


Q: What kind of research has been done to show Euphyllinum is effective for its intended uses?

Studies supporting the uses of Euphyllinum include short-term Randomized Controlled Trials (RCTs) and meta-analyses. These studies primarily examine outcomes related to improving lung function during acute exacerbations in adults and children, and for treating Apnea of Prematurity in infants.


Q: Is there any evidence to support the use of Euphyllinum in conditions other than asthma or COPD?

Yes, official indications also include the evidence-based use of theophylline for the treatment or prevention of Apnea of Prematurity (AOP) in premature infants.

How should Euphyllinum be stored and disposed of?

Euphyllinum (Aminophylline) storage and disposal must adhere strictly to official regulatory requirements to maintain product stability and safety. The storage constraints define how the drug must be kept, protected, and handled.

Official Storage Conditions

Requirement Constraint
Temperature Store at a temperature not exceeding 30 C (86 F) or at controlled room temperature.
Environmental Protection Keep from freezing and protect the product from light and excess moisture.
Container Rule Keep the medicine in its original container and ensure the container is tightly closed.
Child Safety Must be stored out of the sight and reach of children.

Disposal Requirements

Unused or expired Euphyllinum must be disposed of in accordance with local requirements. The official method is to utilize drug take-back programs. The product should not be flushed down the toilet. If take-back is unavailable, the FDA advises mixing the medicine with an undesirable substance (e.g., used coffee grounds) and placing it in a sealed bag before throwing it in the household trash.

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

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