Propranolol Genfar

Quick links to important sections

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 Propranolol Genfar

Property Description
Active ingredient Propranolol hydrochloride
Form Tablet, oral solution, extended-release capsule
Pharmacological class Nonselective Beta-Blocker
General purpose To stabilize heart rate and blood pressure
Origin Synthetic

The Identity and Classification of Propranolol Genfar

Propranolol Genfar is a pharmaceutical preparation whose active substance is the synthetic compound Propranolol. The preparation, provided under the Genfar trade name, contains Propranolol hydrochloride and is often distributed in Latin American regions. The active compound is C16H22ClNO2, and it is classified as a Nonselective Beta-Adrenergic Receptor Antagonist, or beta-blocker, and is only available through a prescription.

Propranolol is distinguished by its nonselective action, meaning it blocks receptors in both the heart and other bodily systems, unlike selective agents that predominantly target only cardiac receptors. This drug class is categorized as both a Group II antiarrhythmic and a non-cardioselective beta-blocker. This unique pharmacological profile is clinically recognized for its generalized anti-adrenergic effects.

Form, Composition, and General Purpose

Propranolol Genfar is a single-ingredient product presented primarily as an oral tablet and a liquid solution, offering flexibility for administration. The preparation consists solely of the active ingredient and necessary pharmaceutical excipients.

The general purpose of the medicine is to reduce the physiological impact of stress hormones, such as Epinephrine (Adrenaline), on the heart and vasculature. By blocking the effects of these hormones, Propranolol works to slow the heart rate and lessen the force of contraction. This mechanism improves blood flow and decreases blood pressure by relaxing blood vessels and slowing the heart rate. This fundamental action provides a core benefit of stabilizing cardiovascular function and regulating symptoms related to excessive nerve activity.

What side effects are possible with Propranolol Genfar?

Official Classification of Adverse Reactions

The safety profile of Propranolol is formally categorized in regulatory documents, outlining the documented adverse reactions according to the estimated frequency observed in clinical use. These effects are grouped into System-Organ Classes (SOCs), reflecting the medicine’s generalized effect across various systems, including Cardiac, Vascular, Nervous System, and Psychiatric disorders.

Adverse reactions classified as Common are those expected to occur in at least 1 in 100 patients. These frequently documented effects include bradycardia (slowed heart rate), fatigue, sleep disturbances (including nightmares), dizziness, cold extremities, and various gastrointestinal disturbances such as nausea and diarrhea. Vomiting is classified as Uncommon.

Reactions classified as Rare (occurring in less than 1 in 1,000 patients) cover central nervous system effects such as depression, confusion, and hallucinations, as well as skin reactions like hair loss and psoriasiform skin reactions.

Documented Safety Constraints and Serious Reactions

The official label highlights certain safety constraints and serious adverse reactions. The medicine is contraindicated in individuals with uncontrolled heart failure, severe bradycardia, high-grade heart block, and pre-existing bronchial asthma due to the risk of bronchospasm.

Serious adverse reactions, though rare, include the potential for precipitating or worsening heart failure or severe hypotension. The label also notes specific safety considerations for diabetic patients, as the medicine may mask symptoms of hypoglycemia (low blood sugar), and warns against the abrupt cessation of therapy, which can lead to cardiovascular safety risks.

Overdose and Emergency Response

Overdose and When to Seek Help

An overdose of Propranolol hydrochloride is a serious event defined by regulatory documents based on the resulting life-threatening clinical manifestations. The primary documented presentations involve the cardiovascular and metabolic systems, which require immediate intervention.

Documented Manifestations

Overdose may present with profound cardiovascular depression, including severe bradycardia (slow heart rate) and marked hypotension (low blood pressure), potentially leading to shock or decompensated heart failure. Severe manifestations documented in official labeling also include bronchospasm (breathing difficulty) and significant hypoglycemia (low blood sugar). This metabolic instability can manifest as seizures, confusion, or coma. The risk of hypoglycemia is particularly noted to be higher in children and infants, especially during periods of fasting.

Mandated Emergency Action

Immediate medical attention must be sought in all suspected overdose cases. Regulatory guidance requires that individuals displaying severe symptoms, such as persistent symptomatic bradycardia, profound hypotension, or clinical signs of hypoglycemia, must go straight to the hospital. Management is strictly symptomatic and supportive. Specific interventions are officially described, including the administration of Glucagon for depressed myocardial function and the use of agents like atropine or potentially temporary cardiac pacing for severe bradycardia. The regulatory label notes that a particular pressor agent, epinephrine, is not indicated for management in this context.

Therapeutic Uses of Propranolol Genfar

What Propranolol Genfar Treats: Main Uses and Benefits

This medication is commonly used across therapeutic domains involving heightened physiological activity and recurrent symptomatic episodes. It is generally applied in clinical settings to help with symptoms related to systemic imbalance.

Stabilization of Heart Rate and Blood Pressure

This domain addresses symptoms related to systemic imbalance, such as sustained high blood pressure (hypertension) and episodic chest discomfort (stable angina). It is applied in clinical settings that involve chronic or unstable symptom patterns, which assists with supporting functional stability and contributes to easing the overall symptom load.

Relief from Recurrent Neurological Symptoms

Propranolol is generally applied in clinical settings to help with symptom clusters characterized by recurrence or involuntary movement. This may include its use as prophylactic therapy, which may assist with managing the frequency and intensity of episodic migraine manifestations.

Management of Acute Physical Manifestations

It is applied in scenarios where symptoms related to heightened physiological activity become more disruptive, such as those related to hyperthyroidism or situational stress. This offers symptomatic support, which helps patients cope more steadily with difficult episodes and contributes to improved day-to-day comfort. The medication may assist with managing the severity and visibility of pronounced shaking associated with essential tremor, supporting stability in daily routine.

Regulatory References

  1. NIH MedlinePlus overview of Propranolol

Eligibility and Restrictions for Use

Who Can and Cannot Use Propranolol Genfar?

Eligibility to use Propranolol (the active ingredient in Propranolol Genfar) is strictly defined by regulatory health authorities and is based on a patient's pre-existing conditions and age. This medicine is primarily approved for use in adults for labeled indications and in pediatric patients for conditions such as hypertension and migraine prophylaxis.

Absolute Contraindications

Propranolol is strictly contraindicated and must not be used in patients with the following conditions, as they represent an absolute non-eligibility rule from official labeling:

  • Bronchial asthma or a history of bronchospasm.
  • Severe sinus bradycardia (slow heart rate) or second- or third-degree atrioventricular (AV) block (unless a pacemaker is present).
  • Cardiogenic shock or uncontrolled heart failure.
  • Metabolic acidosis or untreated pheochromocytoma.

Conditional and Age-Related Restrictions

Use is restricted in certain populations and requires caution:

  • Hepatic or Renal Impairment: Patients with liver or kidney disease require careful use, as official labels mandate monitoring due to the risk of drug or metabolite accumulation.
  • Diabetes Mellitus: Caution is necessary as Propranolol can mask the physical signs of hypoglycemia.
  • Pregnancy and Lactation: Use during pregnancy is generally not recommended unless essential, and the drug is excreted into human milk, requiring caution during lactation.
  • Children: The drug's safety and efficacy are not established for all indications across the general pediatric population.

What should I know about interactions with other medicines?

Official regulatory documents identify the co-administration of Propranolol Genfar with certain non-dihydropyridine calcium channel blockers (e.g., Verapamil, Diltiazem) as not recommended due to the potential for severe cardiac depression. The combination with Thioridazine is also discouraged as it can increase the concentration of Thioridazine.

The official profile extensively details pharmacokinetic interactions primarily driven by CYP enzymes. Inhibitors of CYP2D6, CYP1A2, and CYP2C19 (such as Fluoxetine and Ciprofloxacin) are documented to increase exposure to propranolol. Conversely, inducers of these same enzymes (including Rifampin, Phenytoin, and Smoking) decrease plasma levels, which may reduce expected efficacy. Non-CYP agents like Cimetidine and Hydralazine are also noted to increase plasma levels, while Cholestyramine and Colestipol significantly reduce them. Additionally, propranolol has been shown to increase the bioavailability of the anticoagulant Warfarin.

Pharmacodynamic reinforcement is documented with drugs such as Digoxin and Clonidine, increasing the risk of significant bradycardia due to additive effects. Mandatory timing requirements are specified for certain interactions; for instance, IV non-dihydropyridine calcium channel blockers must not be administered within 48 hours of discontinuing propranolol. Furthermore, the drug's effects may be increased in patients with Hepatic Impairment/Cirrhosis due to reduced clearance, and Alcohol consumption is documented to reduce propranolol plasma levels.

Mechanism of Action

Blocking Adrenergic Receptors

Propranolol is a non-selective beta-blocker that acts primarily by competitively blocking beta1 and beta2 adrenergic receptors throughout the body. This action prevents the binding of epinephrine (adrenaline) and norepinephrine (noradrenaline), thereby modulating the activity of the sympathetic nervous system and suppressing signaling sequences that lead to downstream effects.


Modifying Sympathetic & Cardiac Activity

By limiting catecholamine binding, the drug modifies early molecular steps, leading to a reduced heart rate (chronotropy) and decreased force of myocardial contraction (inotropy). This mechanism contributes to the attenuation of excessive cardiac beta-receptor signaling and influences signaling dynamics within the targeted pathways, resulting in altered physiological endpoints.


Central Nervous System and Renin Inhibition

As a lipophilic agent, Propranolol can cross the blood-brain barrier, affecting central signaling pathways. Furthermore, it engages mechanisms in the kidneys to inhibit renin release, thereby modifying signaling patterns within the Renin-Angiotensin System (RAAS). These actions collectively influence key regulatory systems and modulate the downstream effects resulting from high concentrations of signaling mediators.

Dosage and Administration Information

How to Use Propranolol Genfar

Propranolol is administered primarily via the oral route as tablets, extended-release capsules, or solution. Intravenous use is reserved for acute, supervised clinical settings. The specific dosage and frequency depend on the therapeutic regimen established by a healthcare professional, following the official prescribing information.

Administration Patterns and Dosing

Immediate-release (IR) tablets typically require administration two to four times daily (BID to QID). The total daily dose is often divided and taken with respect to meals. In contrast, extended-release (ER) capsules are designed for once-daily (QD) administration. Dosage adjustments are commonly performed at weekly intervals until the desired regimen is reached.

Administration Detail Official Instruction Summary
Intake Consistency May be taken with or without food, but must be taken consistently (the same way each time).
ER Capsule Handling Must be swallowed whole and must not be crushed, chewed, or opened.
Adult Dosing Range Maintenance ranges typically fall between 120 mg to 240 mg per day for common indications, administered in divided doses.

Procedural Rules and Discontinuation

Treatment must be stopped using a gradual discontinuation protocol, with the dosage reduced over a period of several weeks, particularly when used for long-term cardiovascular support. For older adults, treatment is initiated with the lowest available dose to determine the optimal individual response. Certain pediatric uses mandate a body-weight-based dosing calculation and a defined treatment period, such as six months for infantile hemangioma. If a dose is missed, it should be taken as soon as remembered, unless it is close to the time for the next scheduled dose, in which case the missed dose is skipped.

Recent Clinical Evidence

Evidence for Cardiovascular Stabilization: Hypertension and Angina

The research record includes extensive study for use in both high blood pressure (hypertension) and chest discomfort (angina pectoris). This evidence base features long-term dedicated controlled trials (RCTs) and systematic reviews. Researchers examined how the medicine was associated with changes in blood pressure, and monitored outcomes related to major cardiovascular events, such as heart attack or stroke, and all-cause mortality. While large cohorts track long-term patterns, uncertainty remains regarding direct comparison with newer drug classes for long-term outcomes related to stroke and all-cause mortality.


Evidence for Neurological Symptom Relief: Migraine and Essential Tremor

Research has explored the role of propranolol in conditions characterized by episodic manifestations, such as migraine and essential tremor. For migraine, placebo-controlled RCTs were used in research exploring short-term symptom changes, measuring the number of monthly migraine days. For essential tremor, studies evaluated adult populations using functional rating scales to assess changes in tremor severity and amplitude, focusing on outcomes related to action tremors. However, many efficacy trials are short-term, meaning long-term effects are not fully established based on dedicated, multi-year RCTs for these conditions.


Evidence for Use in Specialized Conditions: Infantile Hemangioma

The use of propranolol in infants with proliferating infantile hemangioma was studied within a very specific, specialized context. This area is characterized by dedicated pivotal Phase II/III randomized, controlled trials in infants aged 5 weeks to 5 months. The studies monitored the proportion of infants who achieved pre-defined criteria for hemangioma volume and size at a defined time point (typically 24 weeks). This specific evidence base supports a particular oral solution formulation for the pediatric population.


Gaps and Uncertainties in the Research Record

The evidence base for propranolol still contains research limitations. In cardiovascular contexts, limited comparative evidence exists against several newer drug classes. Data for certain groups, such as those with multiple complex concurrent health conditions or older cohorts, remain limited. Furthermore, the evidence quality varies across studies, and research does not determine whether an individual will respond similarly to the group patterns observed in some studies.

Key Studies & References

  1. Propranolol for complicated infantile hemangiomas: a pivotal Phase 2/3 adaptive, randomized, controlled trial (The key hemangioma study)
  2. NICE Guideline on Hypertension in adults: diagnosis and management (Clinical context for cardiovascular evidence)

Frequently Asked Questions (FAQ)

Common questions about Propranolol Genfar (FAQ)

Q: Will I feel different if I switch from the immediate-release tablet to the extended-release capsule?

Official documents indicate that the extended-release (ER) form is designed for slow release of the active ingredient, resulting in blood levels that remain fairly constant over approximately 12 hours. This sustained effect supports the once-daily administration pattern, in contrast to the immediate-release tablets, which are designed for multiple daily administrations.

Q: Is it true that Propranolol Genfar can affect memory?

In official summaries of adverse reactions, effects such as confusion, disorientation, and short-term memory loss have been described, although the reported frequency of these effects is not specified in certain documents. If changes in thought process or memory are experienced, these effects are generally addressed by a healthcare professional.

Q: Can Propranolol Genfar be taken safely with over-the-counter pain relievers (NSAIDs)?

The regulatory drug profile notes that certain common medications for pain and inflammation, known as NSAIDs (Nonsteroidal Anti-inflammatory Drugs), are among the products that may interact with Propranolol Genfar. The need to disclose all medications, including over-the-counter pain relievers, is documented due to the potential for interaction.

Q: Does Propranolol Genfar affect blood sugar levels?

Official warnings note that this medicine may increase the risk of low blood sugar (hypoglycemia), particularly in individuals with diabetes. Furthermore, it can obscure the typical physical signs of low blood sugar, such as a rapid heartbeat, making it harder to recognize when blood sugar levels are dropping.

Q: Can Propranolol Genfar cause problems with sexual function?

Regulatory reports include documentation that change in sex drive or performance and reduction or loss of libido have been observed as possible effects in some patients. This information is included in the safety profile of the medication.

Q: Does Propranolol Genfar affect my ability to drive or operate machinery?

Patients are advised that common side effects like dizziness or blurred vision may occur while taking the medicine. Information advises that patients become familiar with how the medicine affects them before engaging in such activities, as these effects have the potential to impair the ability to operate machinery or drive a vehicle.

Q: Does Propranolol Genfar cause weight gain?

Weight gain has been reported as a side effect in post-marketing and clinical data for some patients. Research has indicated that modest average weight increases have been observed in certain long-term study populations who have used the medication.

Q: What is the average time it takes for Propranolol Genfar to leave the body?

The time it takes for the active ingredient to be eliminated from the body is measured by its half-life. The elimination half-life is typically reported as 2 to 5.5 hours for the immediate-release formulation and approximately 8 to 10 hours for the extended-release formulation.

Q: Does Propranolol Genfar interact with herbal supplements or dietary products?

Regulatory patient information generally advises people to inform their healthcare provider about all products they use. This includes herbal products, vitamins, and dietary supplements, as these may contain ingredients that are noted as potential interacting substances.

Q: Can Propranolol Genfar cause hair loss or hair thinning?

The official safety profile classifies hair loss as a rare adverse reaction, meaning it is expected to occur in less than 1 in 1,000 patients who use the medicine. This is a documented, though infrequent, possible side effect.

Q: What are the typical long-term effects of using Propranolol Genfar for high blood pressure?

For high blood pressure, the medicine is generally used long-term to help relax blood vessels, slow the heart rate, and decrease blood pressure. This fundamental action is intended to mitigate the long-term risk of damage to organs like the heart and kidneys associated with chronic hypertension.

Q: Can Propranolol Genfar be taken if I have kidney or liver issues?

The regulatory profile states that patients with hepatic (liver) or renal (kidney) impairment require careful use and monitoring. This caution is necessary because reduced clearance by these organs may lead to increased levels of the medication in the body.

Q: Is there a link between Propranolol Genfar and changes in mood or depression?

The official safety profile classifies depression as a rare adverse reaction. Side effect summaries also include descriptions of broader psychiatric effects, such as mental depression and rapidly changing moods.

How should Propranolol Genfar be stored and disposed of?

Official Storage and Disposal Requirements

All storage and disposal information for Propranolol is defined by regulatory agencies to ensure product integrity and safety.

Storage and Protection Requirement
Temperature Store at Controlled Room Temperature (CRT), 20 C to 25 C (68 F to 77 F).
Environmental Protection Must be stored in a tight, light-resistant container and protected from light.
Child Safety Keep this and all medications out of the reach of children. The packaging must use a child-resistant closure.

Disposal instructions dictate that any unused or expired product must be discarded in accordance with local requirements. The medicine should not be disposed of via household wastewater.

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

Available in countries:

Equivalent of Propranolol Genfar found in:

A-Z Index: