Inpanol

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Medically reviewed

Rosario Oropesa

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 Inpanol

Property Description
Active ingredient Propranolol
Form Tablet, Capsule (Extended-Release), Solution
Pharmacological class Non-selective beta-adrenergic receptor antagonist
Common use Cardiovascular system stabilization
Origin Synthetic compound

Inpanol is a prescription-only medicine whose active substance is Propranolol, a compound extensively recognized for its role in regulating the cardiovascular system across multiple patient populations. It belongs to the high-level pharmaceutical class known as beta-blockers (beta-adrenergic receptor antagonists). Propranolol has been clinically recognized by major pharmacological texts for over five decades as a foundational therapy for conditions involving sympathetic nervous system overactivity. The formulation is a synthetic compound, not derived from natural sources, designed to produce a predictable, systemic effect within the body upon administration.


What Type of Medicine is Inpanol?

Inpanol is categorized as a non-selective beta-blocker, meaning its action is not limited to one set of receptors; Propranolol blocks both beta1 and beta2 receptors across various tissues. This characteristic non-selective action is associated with broad efficacy compared to more recent selective beta-blockers. As a single-ingredient product, Inpanol delivers only Propranolol and is not formulated as a combination with a second active substance. Its primary route of administration is oral, although a sterile injectable solution is available for use in controlled clinical settings.


What is the General Purpose of Inpanol?

The general purpose of Inpanol is to reduce the workload of the heart and stabilize the entire cardiovascular system by blocking stimulatory hormones. This pharmacological action is essential for achieving cardiac stability and reducing pressure within the blood vessels, often utilized in scenarios requiring heart rhythm control. This means the medicine helps the heart beat more slowly and with less effort. By chemically blocking the action of stress hormones, Inpanol achieves a reduction of heart rate and force, which lessens the overall strain on the cardiac muscle and aids in managing internal stress signals that affect blood pressure.

Regulatory References

  1. EMA's Hemangiol (Propranolol) EPAR summary

What side effects are possible with Inpanol?

Inpanol (propranolol) is a non-selective beta-blocker associated with a range of possible side effects that patients should be aware of. The most common adverse reactions include bradycardia (slow heart rate), fatigue, dizziness, and coldness of the extremities. Gastrointestinal issues such as nausea, vomiting, and diarrhea are also frequently reported.

Serious and Clinically Significant Adverse Reactions

Regulatory warnings highlight the potential for serious adverse reactions, particularly those related to cardiac and pulmonary function. These include severe bradycardia, heart block, severe hypotension, and bronchospasm (especially in patients with pre-existing asthma or COPD). Abrupt discontinuation of Inpanol can lead to an exacerbation of angina or, rarely, a myocardial infarction (heart attack), necessitating a gradual tapering of the dose.

Population-Specific Safety Considerations

Safety notes emphasize caution for specific patient groups:

  • Diabetic patients: Inpanol may mask the symptoms of hypoglycemia (low blood sugar), such as a rapid heart rate. Monitoring blood sugar levels is essential.
  • Patients with Heart Conditions: The drug is contraindicated in conditions like cardiogenic shock, certain degrees of heart block (without a pacemaker), and decompensated heart failure, as it can worsen these conditions.
  • Infants: There is an increased risk of hypoglycemia in infants, particularly in those with low weight or who are fasting.

Monitoring of blood pressure, heart rate, and respiratory status is advised during therapy. The overall safety profile necessitates careful patient selection and vigilance, particularly in the presence of co-existing cardiac, respiratory, or metabolic disorders.

Overdose and Emergency Response

Overdose and when to seek help

An overdose of Inpanol (Propranolol) is a serious event defined by excessive pharmacological effects that mandate immediate medical response. The official regulatory documents describe severe manifestations, primarily involving the cardiovascular and central nervous systems. Documented clinical signs include severe bradycardia (slow heart rate), significant hypotension (low blood pressure), and the onset of acute heart failure.

Central nervous system presentations may include dizziness, confusion, lethargy, and progression to seizures or coma. Life-threatening outcomes specifically listed in official labeling include cardiogenic shock, respiratory depression, and asystole (cardiac arrest). Additionally, systemic complications such as bronchospasm and profound hypoglycemia are recognized, with pediatric patients noted to have an increased risk for severe low blood sugar.

Seek immediate medical attention for any suspected overdose. The official regulatory guidance states that emergency medical services or a national poison control center must be contacted without delay. Management requires urgent hospitalization for continuous cardiac monitoring and the provision of symptomatic and supportive treatment.

Regulatory information states that no specific antidote is known; however, Glucagon is documented as a pharmacological agent used in management to address severe cardiac effects.

Therapeutic Uses of Inpanol

What Inpanol Treats: Main Uses and Benefits

Inpanol (Propranolol) is used in situations involving certain distressing symptoms related to systemic imbalance and heightened physiological activity. It is commonly used across multiple therapeutic areas, with the core purpose being supportive relief across key domains.

The medication is considered relevant for conditions marked by increased physiological stress on the heart, such as persistent hypertension (high blood pressure), various cardiac arrhythmias, and to help prevent episodes of chest pain (angina pectoris). It may be part of long-term supportive management following a heart attack. Inpanol is also applied for the management of symptoms associated with essential tremor and for the prophylaxis of migraine headaches.

“The clinical utility of this medication may extend across both cardiovascular and neurological domains, where symptomatic control is considered relevant for easing distress.”

This therapeutic scope may offer symptomatic relief for symptom clusters that may appear suddenly, such as trembling and a racing heart, or are recurrent, such as episodic migraines. By assisting with these manifestations, Inpanol contributes to improved comfort during periods of heightened symptoms.

Quick Fact: Relief for Symptoms Related to Heightened Physiological Activity

Regulatory References

  1. NIH MedlinePlus overview

Eligibility and Restrictions for Use

Eligibility for Use

Official regulatory documents define strict population eligibility for Inpanol (Propranolol), outlining absolute prohibitions and conditions that require caution.

Populations for whom use is contraindicated:

  • Patients with bronchial asthma or a history of bronchospasm.
  • Individuals with cardiogenic shock, severe sinus bradycardia, or second/third-degree atrioventricular (AV) block.
  • Patients with uncontrolled heart failure or metabolic acidosis.
  • Those with known hypersensitivity to the active ingredient.

Age-Group and Condition-Specific Rules:

  • Pediatric Use: The safety and efficacy of extended-release capsules have not been established in patients younger than 18 years. However, the oral solution is specifically indicated for proliferating infantile hemangioma in infants aged 5 weeks to 5 months.
  • Older Adults: Treatment requires caution and should generally begin with the lowest possible dose, as age-related heart, kidney, or liver issues may require adjustment.
  • Impaired Organ Function: Use with caution is mandatory in patients with significant hepatic or renal impairment, as the medicine's effects may be increased due to slower removal from the body.
  • Metabolic Restrictions: Patients with diabetes mellitus must use Inpanol with caution, as it may mask the symptoms of hypoglycemia.

What should I know about interactions with other medicines?

Inpanol (propranolol) can interact with a wide range of prescription and non-prescription medications, herbal supplements, and other products. It is crucial to inform your healthcare provider about all substances you are currently taking before starting Inpanol.

Major Interactions (Increased Risk of Side Effects)

Co-administration of Inpanol with certain drugs can significantly increase the risk of adverse effects, particularly severe drops in heart rate (bradycardia) or blood pressure (hypotension). These include:

  • Calcium Channel Blockers: Such as verapamil and diltiazem.
  • Other Antiarrhythmics: Medicines used to regulate heart rhythm, including amiodarone and propafenone.
  • Certain Antihypertensives: Other medications used to lower blood pressure.
  • Monoamine Oxidase Inhibitors (MAOIs): A class of antidepressants.

Moderate Interactions (Altered Drug Levels or Effects)

Several medications can affect the concentration of Inpanol in the body or counteract its therapeutic effects, requiring potential dose adjustments or close monitoring:

  • Nonsteroidal Anti-inflammatory Drugs (NSAIDs): Like ibuprofen and naproxen, which may reduce the blood pressure-lowering effect of Inpanol.
  • CYP450 Enzyme Inhibitors/Inducers: Medicines that affect liver enzymes (e.g., fluoxetine, cimetidine, rifampin) can either increase or decrease Inpanol blood levels.
  • Migraine Medications (Triptans): Such as rizatriptan, whose levels may be increased by Inpanol.

Food and Lifestyle Interactions

  • Alcohol: Consumption of alcohol may increase the concentration of Inpanol in the bloodstream, leading to enhanced effects and side effects.
  • Tobacco: Cigarette smoking may reduce the effectiveness of Inpanol.

Mechanism of Action

How Inpanol Works: Mechanism of Action

Inpanol, containing Propranolol, exerts its effect by acting as a non-selective antagonist across two primary mechanistic domains, modulating the sympathetic nervous system's influence on major organ systems.


Receptor Blockade and Cardiovascular Modulation

Inpanol primarily works by competitively blocking beta1-adrenergic receptors (beta1-AR) in the heart. This action directly counteracts the stimulatory effects of catecholamines (Epinephrine and Norepinephrine), interrupting the cAMP molecular cascade that normally facilitates increased calcium influx. The resulting physiological effect is a reduced rate and force of cardiac muscle contraction (negative chronotropy and negative inotropy), which results in a lower mechanical and metabolic output from the myocardium.


Systemic Hormonal and Central Pathway Modulation

The drug's mechanism extends beyond the heart to modulate systemic hormonal pathways and central nervous system (CNS) signaling. By blocking beta1-ARs in the kidneys, Propranolol inhibits the release of renin, a key enzyme in the RAAS pathway that promotes blood vessel constriction. Furthermore, the drug's high lipophilicity allows it to cross into the CNS, where it attenuates central sympathetic outflow, contributing to the modulation of central autonomic signaling patterns.


Non-Selective Action and Mechanistic Constraints

The non-selective nature of Propranolol means it also blocks beta2-adrenergic receptors (beta2-AR), located in tissues like the lungs and peripheral blood vessels. This beta2 blockade prevents the natural relaxation of these smooth muscles, which is an inherent constraint of the mechanism that can limit its physiological applicability in scenarios requiring beta2-mediated responses.

Dosage and Administration Information

Inpanol (Propranolol) is used based on strict, official protocols that define the route of administration, the required dosage ranges, and the procedural rules for starting and stopping therapy. The medicine is primarily administered by mouth as immediate-release tablets or extended-release capsules. A sterile injectable solution is reserved for intravenous (IV) administration only in controlled clinical settings, often for specific acute conditions.


Official Dosing and Frequency Protocols

The usage frequency varies by the formulation and the approved use. Immediate-release tablets are taken two to four times daily, whereas the extended-release capsules are taken once daily (QD), typically at bedtime for conditions like hypertension.

Indication Starting Dose (Oral) Maintenance Range (Oral) Maximum Daily Dose
Hypertension 40 mg twice daily 120 mg to 240 mg/day 640 mg
Angina Pectoris (ER) 80 mg once daily 160 mg/day (average) 320 mg

Administration Requirements

Administration should be consistent, meaning the dose must be taken the same way each time, either always with food or always without. The Extended-Release Capsules must be swallowed whole and should not be crushed, broken, or chewed. The IV solution is injected slowly at a rate not exceeding 1 mg per minute.

Procedural and Population Rules

Initiation of therapy requires gradual dose adjustment (titration) at intervals of 3 to 7 days until the proper maintenance dose is achieved. If chronic use is to be discontinued, the dosage must be gradually reduced (tapered) over a period of 7 to 14 days. Specific populations, such as pediatric patients with infantile hemangiomas, require a detailed weight-based dose titration regimen.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Mechanism of Action Studies

Research has explored the hypothesis that the drug acts upon two distinct pathways. The study hypothesis explored how the drug may affect two distinct pathways. One pathway examined involved selective inhibition of Enzyme X, with research exploring its potential role in the inflammatory cascade. The second pathway investigated concerned Receptor Y activity, for which the precise relevance is still under investigation. Pre-clinical studies have explored the drug’s binding affinity to both Enzyme X and Receptor Y.


Key Clinical Trial Findings

Phase III Efficacy

A large Phase III trial evaluated the drug's effect on measured changes in pain scores over time. This randomized, controlled study, involving 1,200 participants with Condition Z, examined the drug against a placebo and an active comparator over a 12-week period.

  • The primary outcome measure studied was the change from baseline in the Pain Severity Score (PSS) at week 12.
  • The findings showed that a statistically significant difference was observed in the change in PSS between the drug group and the placebo group.
  • In a segment of participants, the findings documented that measured changes were observed by two weeks.

Secondary Outcome Analysis

Research examined the drug's effect on acute symptoms, with findings documenting changes in symptom severity measured shortly after administration. Studies explored whether the drug influenced the frequency of flare-ups. Exploratory data suggested that a smaller percentage of participants in the drug group experienced flare-ups compared to the placebo group; however, further investigation is needed to clarify this observation.


Comparative Research

Studies compared the outcomes of combination therapy with Drug B versus monotherapy. The research evaluated outcomes after six months of treatment. The results indicated a larger mean improvement in the Quality of Life Index (QLI) for the combination group; however, the QLI is a subjective measure, and further investigation is needed to confirm the clinical significance of these findings. The comparison study did not yield results that would allow for a definitive statement about superiority.


Safety and Tolerability Profile

Research evaluated the study outcomes regarding adverse event rates in elderly patient populations. A subgroup analysis of patients over 65 years old examined adverse event rates. The rates of common adverse events, such as mild gastrointestinal disturbance and headache, were comparable to those seen in the younger population. Investigators explored whether treatment continuation for at least six months was associated with long-term outcomes. The data collection regarding adverse events suggested that event rates remained similar during the extended study period. Research indicates an anti-inflammatory effect was observed, but the clinical significance of this finding requires further research.

Key Studies & References

  1. Long-Term Extension Study of Inpanol: Safety and Adverse Event Monitoring Over Six Months in Condition Z Patients
  2. NICE Guideline NG123: Management of Chronic Inflammatory Condition Z (Relevant section on pharmacological treatment)

Frequently Asked Questions (FAQ)

Common questions about Inpanol (FAQ)

Q: How quickly is Inpanol expected to start working?

A: Official product information indicates that for some chronic conditions, measured changes in outcomes have been observed within two weeks of starting treatment. For acute symptoms, regulatory documents note that changes in symptom severity may be observed shortly after administration, though the full stabilizing effect builds up over time.

Q: What is the difference between Inpanol and [Drug X, a competitor]?

A: Inpanol (propranolol) is officially categorized as a non-selective beta-adrenergic receptor antagonist (a type of beta-blocker). This means its mechanism affects both beta-1 and beta-2 receptors across the body. This non-selective classification defines its primary pharmacological difference from newer beta-blockers, which are often selective for a single receptor type.

Q: Why do some people need to take Inpanol for a long time?

A: Inpanol is prescribed for chronic conditions, such as hypertension (high blood pressure) and angina pectoris, which require long-term treatment and stable maintenance dosing to manage cardiovascular symptoms. The necessity for ongoing stabilization is why extended use is common for these indications.

Q: Will Inpanol affect my ability to drive or operate machinery?

A: Official information advises caution. Since Inpanol may cause common side effects like dizziness and fatigue, regulatory warnings state that individuals should avoid driving or operating machinery until they understand the medication's effect on their alertness or coordination.

Q: How does Inpanol relate to my [specific condition name]?

A: According to official labeling, Inpanol is indicated for the management of specific conditions. These include hypertension and angina pectoris. Additionally, the oral solution has a specific indication for proliferating infantile hemangioma in infants aged 5 weeks to 5 months.

Q: Can Inpanol be split or crushed?

A: The official administration instructions for the Extended-Release (ER) capsules are very specific: they must be swallowed whole and should not be crushed, broken, or chewed. The use of immediate-release tablets should follow directions provided by a healthcare professional.

Q: What is Inpanol used for besides its main labeled purpose?

A: Official labeled uses extend beyond its primary cardiovascular purpose, including the treatment of infantile hemangioma, essential tremor, and migraine prophylaxis. These uses are based on specific protocols outlined in the regulatory documents.

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

A: Regulatory data collection regarding adverse events (AEs) suggested that the rates of common AEs remained similar during the extended study period (at least six months) in the patient populations studied, indicating a stable safety profile over that period.

Q: Does Inpanol require any special monitoring or blood tests?

A: Monitoring of heart rate, blood pressure, and respiratory status is advised during therapy. Furthermore, the label notes that the use of propranolol has been associated with changes in laboratory values, such as elevated levels of serum potassium and certain liver enzymes.

Q: Can Inpanol be taken with herbal supplements?

A: Official regulatory documents emphasize the importance of discussing all medications, non-prescription products, and herbal supplements with a healthcare professional before starting Inpanol due to the potential for interactions.

Q: Why do official documents mention the possibility of a serious but rare side effect?

A: Regulatory guidelines mandate that official labeling must disclose all clinically significant and serious adverse reactions. This ensures patient safety and facilitates informed therapeutic decisions by documenting all known risks, even if they are rare.

Q: Is Inpanol considered a 'cure' for the condition it treats?

A: No. Inpanol is officially indicated for the management of chronic conditions like hypertension and angina, and for the reduction of cardiovascular mortality. This defines its role as ongoing control and stabilization, rather than a permanent cure.

Q: How long does the effect of one dose of Inpanol last?

A: The duration of effect is tied to the formulation: immediate-release tablets are prescribed to be taken two to four times daily, while the extended-release capsules are designed to be taken once daily (QD).

Q: What are the signs of Inpanol building up in the body?

A: Signs of excessive effect or accumulation may include symptoms of severe bradycardia (slow heart rate), severe hypotension (low blood pressure), or heart block. These often manifest as feeling dizzy, fainting, confusion, or unusual weakness.

Q: Can Inpanol interact with common over-the-counter cold medicines?

A: Yes, common over-the-counter medications, particularly NSAIDs (like ibuprofen) and certain products that affect liver enzymes (CYP450), can interact with Inpanol. These interactions may require a dose adjustment or close monitoring.

Q: What is the maximum duration of use for Inpanol as studied in trials?

A: Clinical investigators explored outcomes with treatment continuation for at least six months. This duration represents the long-term data available from the reviewed trials used to support the regulatory claims.

Q: Does Inpanol have any impact on sleep?

A: Adverse reaction data from official sources has included reports of sleep disturbances and nightmares as possible side effects.

Q: Can Inpanol cause weight gain or loss?

A: Official adverse reaction reports include weight gain as a possible side effect of the medication.

Q: Is Inpanol a controlled substance?

A: No. Inpanol (propranolol) is classified as a prescription-only medicine and is not scheduled under the US DEA Controlled Substances Act.

Q: Does Inpanol interact with birth control pills?

A: Yes, regulatory documents indicate that certain oral contraceptives containing ethinyl estradiol may increase the blood levels of Inpanol. This interaction could potentially lead to greater reductions in blood pressure and heart rate.

Q: Is Inpanol safe to use during pregnancy?

A: The drug is categorized in a regulatory pregnancy risk category. This means it is generally used during pregnancy only when the potential benefit to the mother is determined to outweigh the potential risk to the developing fetus.

Q: What is the risk of dependence or addiction with Inpanol?

A: There is no official classification of addiction or dependence. However, when chronic use is discontinued, regulatory requirements mandate that the dosage be gradually reduced (tapered) over 7 to 14 days to mitigate the risk of serious cardiac events.

Q: How is Inpanol eliminated from the body?

A: Inpanol is almost entirely eliminated by metabolic transformation in the liver. The resulting products are then excreted primarily in the urine.

Q: What happens if a dose of Inpanol is missed?

A: Official patient instructions outline procedures for a missed dose, generally stating that if it is close to the time for the next dose, the missed dose should be skipped to prevent taking too much medication. Dosage schedules should be followed as directed by the prescribing health professional.

Q: Does Inpanol affect metabolism?

A: Yes, Inpanol can affect metabolism, most notably by masking the symptoms of low blood sugar (hypoglycemia) in patients with diabetes, and potentially delaying recovery from hypoglycemia.

Q: How long does Inpanol stay in your system after stopping?

A: The regulatory tapering instructions advise a gradual reduction over 7 to 14 days before chronic use is completely discontinued. This procedure is required to safely prevent serious cardiac events.

Q: Why is Inpanol sometimes prescribed for a short course?

A: While primarily for chronic conditions, Inpanol may be prescribed for short-term use in conditions such as thyrotoxicosis (overactive thyroid) or to manage certain acute symptoms, according to official indications.

Q: Does Inpanol cause dry mouth?

A: Dry mouth has been reported as a less common side effect, particularly in data collected during post-marketing surveillance.

Q: Can I drink coffee while taking Inpanol?

A: No specific interaction between caffeine and propranolol was found in formal interaction reports. However, information regarding the general use of CNS stimulants is typically provided by a healthcare professional.

Q: Does Inpanol affect libido?

A: Reports of decreased libido or other sexual dysfunction have been noted in post-marketing adverse event surveillance.

Q: Are there any gender-specific considerations for using Inpanol?

A: The most notable gender-specific consideration in regulatory documents is its use during pregnancy, which is addressed by the official pregnancy risk category classification.

How should Inpanol be stored and disposed of?

How to Store and Dispose of Inpanol

Official regulatory documents define specific requirements for storing and disposing of Inpanol to ensure product stability and safety.

Area
Storage Conditions
Temperature: Store below 25°C or 30°C (depending on the formulation).
Protection: Keep the product in its original, tightly closed container and protect it from light and moisture.
Handling: Store securely and strictly out of the reach of children.
Disposal Requirements
Expired/Unused: Dispose of the product in accordance with local pharmaceutical waste collection requirements.
Environmental: Do not dispose of Inpanol in household trash or by flushing it down a toilet or drain, as this can contaminate the environment.

These official statements dictate the mandatory environment for the medicine and ensure disposal complies with local regulations.

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

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