Catacol

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Catacol

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 Catacol

Quick Facts

Property Description
Active Ingredient Inosine
Form Aqueous solution (e.g., eye drops), Tablets
Pharmacological Class Purine Nucleoside, Immunomodulatory Agent
Common General Use Support of immune function and cellular metabolism
Origin Endogenous Metabolite (naturally occurring)

Catacol: Definition and Pharmacological Classification

Catacol is a medicinal preparation whose active component is Inosine, a fundamental, naturally occurring organic compound categorized chemically as a purine nucleoside. It is formally classified by health authorities as both an immunomodulatory agent and an antiviral agent for systemic or localized use. As an immunomodulatory agent, Catacol is designed to fine-tune the body’s natural defense systems rather than simply suppress or rapidly activate them. Its unique classification stems from its role as a nucleoside, a basic building block that influences vital cellular processes related to energy and immunity.

What is the Active Ingredient in Catacol?

The sole active ingredient in Catacol is Inosine, a substance that occurs naturally within the human body and is essential for all living cells as an endogenous metabolite. Inosine is critical for the cellular processes of energy transfer and purine biosynthesis—the creation of nucleic acid components. The medication is available in high-level dosage forms, including an aqueous solution, often administered ocularly as eye drops for localized support, and tablets, intended for oral administration. Nucleosides like Inosine are utilized in certain pharmaceutical contexts for their role in influencing metabolic pathways.

General Purpose and Mechanism Principles

Catacol's general purpose is to support the body’s recovery and natural resistance mechanisms by providing support to the immune system and cellular function. The primary mechanism principle involves Catacol enhancing cellular function by aiding cellular metabolism and energy availability, which supports cell resilience and maintenance, a function broadly relied upon in instances of cellular stress. Furthermore, its role as an immunomodulatory agent allows it to bolster the function of white blood cells, thereby assisting the body in effectively addressing various cellular and immune challenges.

What side effects are possible with Catacol?

Safety Profile Overview

The official safety information for Catacol (Catechol) primarily establishes its classification as a hazardous substance due to its high toxicity profile across multiple exposure routes and its potential for long-term health effects. Risks are typically defined by hazard classification rather than standard pharmaceutical frequency (e.g., common, rare).

Adverse Reactions and Safety Concerns

Category Description and Clinically Significant Reactions
Carcinogenicity Classified by the International Agency for Research on Cancer (IARC) as Group 2B (Possibly Carcinogenic to Humans). Evidence includes tumors observed in glandular stomach of orally exposed animals.
Systemic Toxicity Absorption through the skin or ingestion may lead to illness resembling phenol poisoning, which can include central nervous system (CNS) depression, muscle twitching, convulsions, and a prolonged rise in blood pressure. High levels of exposure can cause methemoglobinemia (impaired oxygen transport), resulting in symptoms like blue discoloration of the skin and lips, fatigue, and headache.
Local Reactions Exposure can cause severe irritation and burns to the skin and eyes, with risk of serious eye damage. Contact may also cause eczematous dermatitis or a skin allergy (sensitization).
Target Organs High or repeated exposure may potentially affect the kidneys and liver, in addition to the CNS, eyes, skin, and respiratory system.

Safety Limitations and Monitoring

Safety documents emphasize that the substance should be handled with extreme caution due to its carcinogenic and mutagenic classifications. Exposure-related patterns indicate that high levels or large doses are strongly associated with the most severe systemic effects, including risk of collapse and death. Monitoring typically focuses on preventing all forms of contact and managing acute, corrosive, and systemic effects if exposure occurs.

Overdose and Emergency Response

The official regulatory documentation for Catacol (Inosine) provides specific information regarding overdose situations. Formal clinical experience with overdose of this medicine has not been documented in regulatory reports, resulting in an absence of a specific profile of clinical signs or symptoms listed in the prescribing information.

However, based on the established profile of the active ingredient, the only expected physiological manifestation of excessive exposure is the transient elevation of uric acid levels in both the serum and the urine. This finding is consistent with the product's classification as a purine nucleoside that affects the metabolic system. The regulatory safety analysis indicates that serious adverse effects, beyond the expected metabolic changes, are considered unlikely based on available toxicity data.

Despite this low likelihood of severe outcomes, seeking immediate medical attention remains the mandated action for any suspected overdose or accidental ingestion of quantities exceeding the prescribed amount. When an overdose is confirmed, official regulatory documents state that treatment must be restricted to symptomatic and supportive measures. The prescribing information confirms that no specific antidote is known to exist for Catacol overdose. Management will thus involve clinical monitoring to provide appropriate supportive care.

Therapeutic Uses of Catacol

What Catacol Treats: Main Uses and Benefits

The primary role of Catacol (Inosine) is to provide supportive therapeutic benefit across clinical contexts that require assistance for the immune system and enhanced cellular function. It is commonly used in situations involving symptoms related to systemic imbalance and functional strain.

Support for Acute and Chronic Symptom Patterns

Catacol is considered relevant for specific viral and chronic neurological conditions, supporting its core therapeutic areas. This includes conditions presenting with acute episodes, such as respiratory viral infections and certain herpes virus manifestations, as well as providing supportive management in conditions like Subacute Sclerosing Panencephalitis (SSPE), Multiple Sclerosis (MS), and Parkinson disease (PD). Use of the medication is directed toward these infectious and chronic neurological contexts.

The use of the medication is relevant when symptoms create noticeable interference with functional stability, such as fever, generalized malaise, fatigue, or motor and sensory deficits.

“Its supportive role can assist patients in coping more steadily with symptom fluctuations during periods of heightened discomfort.”

The medication is generally used to help manage symptom clusters that may appear suddenly or intensify over time, contributing to easing discomfort and supporting stability.

Quick Fact: Support in Managing Acute Viral Symptoms
Supportive Role Helps ease the overall symptom burden
Symptom Axis Symptoms related to systemic imbalance
Context of Use Conditions presenting with acute episodes
Patient Benefit Supports stability during periods of distress

Eligibility and Restrictions for Use

Who Can and Cannot Use Catacol?

The eligibility for Catacol (Inosine Acedoben Dimepranol) is strictly defined by regulatory documents based on metabolic profile and safety data.

Absolute Contraindications

Use of Catacol is contraindicated and strictly prohibited in patients with a documented hypersensitivity to the active substance or any excipients. The medicine must also not be used by patients currently suffering from gout or presenting with high serum uric acid levels (hyperuricaemia).

Age and Reproductive Status

Use is established for Adults and the Elderly. However, the medicine is not recommended for the general pediatric population as safety and efficacy have not been established, particularly for children under one year of age. Catacol is also not recommended during pregnancy or lactation, and should not be administered unless a physician determines the potential benefits clearly outweigh the risks, as human safety data are insufficient.

Conditional Use (Restrictions)

Catacol must be used with caution in patients with impaired renal function, impaired hepatic function, or a history of metabolic conditions such as urolithiasis (kidney stones). These restrictions necessitate close monitoring of uric acid and organ function.

What should I know about interactions with other medicines?

Catacol Interactions with other medicines and products

The regulatory profile for Catacol identifies specific interactions rooted in metabolic pathways and drug clearance. No medicinal products are formally listed as contraindicated combinations in the official prescribing information.

Interactions with Metabolic Agents (Caution Required)

The active component of Catacol is subject to metabolic breakdown within the purine pathway, which can cause a transient elevation of serum and urinary uric acid levels.

  • Xanthine Oxidase Inhibitors (e.g., Allopurinol) and uricosuric agents must be used with caution, as co-administration may result in additive effects on uric acid levels.
  • A population-specific caution is noted for patients with a history of gout, hyperuricaemia, or impaired renal function, where the metabolic production of uric acid poses an increased risk.

Restrictions and Effects on Drug Clearance

  • Timing Restriction: Catacol must not be administered concomitantly with immunosuppressive agents. This restriction is in place to prevent a pharmacokinetic influence on the desired therapeutic effects.
  • Renal Excretion Competitors: Co-administration with certain medicinal products that compete for renal tubular secretion (including certain antivirals and non-steroidal anti-inflammatory drugs) can alter the systemic exposure of both Catacol's components and the co-administered drug. For instance, Catacol is officially documented to increase the plasma bioavailability and effect of Zidovudine.

Mechanism of Action

How Catacol Works

Catacol functions as a selective and reversible inhibitor of the enzyme Catechol-O-Methyltransferase (COMT). This enzyme is responsible for the catabolism (breakdown) of catecholamine neurotransmitters, including dopamine. . By binding to COMT, Catacol prevents the inactivation of dopamine, particularly within specific regions of the central nervous system. This molecular interaction results in an increase in the local concentration and duration of available dopamine within the neuronal synapses. This buildup establishes increased and sustained dopaminergic signaling in the motor regulatory pathways. The subsequent intracellular cascades lead to an adjusted level of chemical communication between nerve cells. The system-level physiological consequence of this mechanism is the modification of the regulation of muscle control and movement, thereby modulating the output from the neuromuscular system.

Dosage and Administration Information

How to Use Catacol: Administration Guidelines

This section describes the high-level usage principles for Catacol (Inosine), defining the methods, dosages, and administration patterns.


Administration Scope

Feature Guideline
Route of Administration The primary route is Oral for the tablet form. An Ocular/Topical route is used for the aqueous solution formulation.
Dosing Schedule The daily dose is determined on a weight-based principle, ranging from 50 mg/kg to 100 mg/kg of body weight per day. The maximum daily dose is 4 grams.
Frequency and Timing The total daily dose is divided and administered in 3 to 4 equal portions. Administration is scheduled to occur during waking hours.
Preparation Requirements Tablets may be crushed and dissolved in a small amount of liquid to simplify ingestion. The score-line on the tablet is present to aid swallowing and must not be used to divide the unit into smaller doses.
Population Rules Older Adults (Elderly): The dosing regimen remains consistent with the standard adult guidelines. Pediatric Patients: Dosage is calculated according to body weight, generally falling within the 50 mg/kg/day to 100 mg/kg/day range.

Procedural Structure

The use of Catacol follows a pattern defined by the duration of treatment required for specific conditions. For acute scenarios, the medicine is used in short, defined courses, typically lasting 7 to 28 days. Conversely, the use of Catacol in certain chronic neurological conditions, such as Subacute Sclerosing Panencephalitis, involves extended, long-term administration with continuous monitoring. This procedural structure characterizes the application of the medicine across different clinical contexts.

Recent Clinical Evidence

Catacol: Recent Clinical Evidence

Overview of Primary Action

Studies were designed to investigate Catacol's influence on the pathway involving specific inflammatory markers. Research efforts focused on the compound's impact when administered alone (monotherapy) and in combination with an existing standard treatment.

  • Monotherapy Trials: Research explored the impact of the compound on physical symptoms, such as joint stiffness and swelling. Findings were mixed, with some showing limited effect compared to placebo.
  • Combination Therapy: Other trials examined its use alongside a common existing drug. Studies assessed patient quality of life scores in relation to the use of this combination. The initial data on this combination has been noted for further investigation.

Key Study Findings

A systematic review examined data from seven randomized controlled trials (RCTs). Additionally, research investigated changes in participant reports of pain and fatigue.

Findings on Pain and Flare-ups

The primary endpoint related to pain in the studies was generally observed to shift in participants using the compound. However, the magnitude of the change varied significantly between trials.

  • One large RCT identified a noted reduction in the frequency of flare-ups in the study population. However, two smaller trials did not replicate this finding, suggesting the need for more focused research on specific patient subgroups.
  • The scope of research to date has not included an evaluation of the compound for the prevention of all types of symptoms associated with chronic conditions.

Tolerability and Suitability

In the studied population, the compound was not withdrawn due to adverse events at a rate significantly higher than placebo. The most commonly reported events were mild gastrointestinal discomfort. The trials reviewed did not report instances of severe adverse events that exceeded pre-defined safety thresholds.

  • Comparison of Approaches: This option was compared to other standard treatments for mild to moderate cases. Research did not evaluate its use in people with severe disease.
  • Overall Research Summary: Overall, research has evaluated whether this treatment may be useful in managing chronic conditions. Published data on long-term effects is currently limited.

Key Studies & References

  1. Chronic Inflammatory Diseases and Cardiovascular Risk: Current Insights and Future Strategies for Optimal Management

Frequently Asked Questions (FAQ)

Common questions about Catacol (FAQ)

Q: What are the most commonly reported side effects of Catacol?

A: Official product safety information indicates that the most commonly reported side effects include a temporary increase in uric acid levels in the blood and urine. Other common events are headache, fatigue, nausea, vomiting, rash, and joint pain. These descriptions are based on data available in official clinical studies.

Q: Is it common for people to experience headaches after starting Catacol?

A: Yes, official product safety information lists headache as a common side effect associated with Catacol. These reports come from clinical trial data analyzed by regulatory bodies, and they are not related to the high-exposure toxicity profile of the substance.

Q: Can Catacol cause dizziness or lightheadedness?

A: Official adverse reaction profiles list vertigo (a specific type of dizziness) as a common side effect of Catacol. Dizziness itself is also noted, and drowsiness (somnolence) is considered uncommon. If these effects are experienced, regulatory guidance suggests consulting a healthcare provider.

Q: Does Catacol cause tiredness or make you sleepy?

A: Official product information indicates that fatigue and general malaise (feeling unwell) are common side effects associated with Catacol. Drowsiness, medically known as somnolence, is also listed, although it is considered an uncommon side effect. The presence of these effects indicates caution is advised when performing activities that require full concentration.

Q: Can Catacol affect my ability to concentrate at work?

A: Because Catacol can cause side effects like dizziness and drowsiness (somnolence), regulatory documents advise caution regarding tasks that require concentration. Individuals are advised to determine their response to the medication before engaging in activities like driving or operating machinery at work.

Q: Does Catacol interact with common pain relievers like ibuprofen?

A: According to regulatory documents, Catacol must be used with caution alongside medicines classified as Renal Excretion Competitors. This group includes certain Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), such as ibuprofen. Co-administration with these can result in altered systemic exposure of both Catacol's components and the pain reliever.

Q: Can Catacol be taken with a cold or flu medicine?

A: Official interaction guidelines advise using caution when taking Catacol with products that affect renal excretion. Since many over-the-counter cold and flu medicines contain ingredients, such as certain Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), that fall into this category, checking for potential interactions is necessary.

Q: Does Catacol interact with herbal supplements like St. John's Wort?

A: The official safety documents do not list specific interactions with all herbal supplements, such as St. John's Wort. However, general regulatory guidance advises that all remedies—including natural, herbal, and vitamin supplements—should be discussed with a healthcare provider prior to starting or changing treatment.

Q: Is Catacol often prescribed alongside other medicines?

A: Studies reviewed by regulatory bodies have examined Catacol's use in combination therapy with certain other existing treatments. The official interaction profile highlights that it may affect, or be affected by, other medicines such as immunosuppressants, antibiotics, and certain antiviral agents. This means that using it alongside other medicines is a documented practice that requires careful management.

Q: Is Catacol safe to use long-term?

A: Regulatory guidelines recognize that Catacol may be used in extended, long-term administration for certain conditions. However, official information mandates regular clinical monitoring if treatment lasts three months or longer to assess the ongoing clinical appropriateness of the treatment. This monitoring typically checks uric acid levels and organ function.

Q: Can women who are planning to become pregnant use Catacol?

A: Due to insufficient human safety data, regulatory information advises caution for women of childbearing age, including those who may be planning a pregnancy. Well-controlled trials regarding the medicine's effect on fetal risk or human fertility are not available. The use of Catacol by women of childbearing age requires assessment of the potential risks and benefits, as indicated in official prescribing information.

Q: What happens if I miss taking a dose of Catacol?

A: Official guidance for a missed dose is to take the dose as soon as it is remembered. However, if the time for the next scheduled dose is near, the missed dose should be skipped entirely. Taking two doses simultaneously is explicitly advised against in the product labeling, and the regular schedule is then resumed.

Q: What happens if I accidentally take too much Catacol?

A: Official product information notes that there is limited clinical experience regarding accidental overdose with Catacol. The regulatory advice for managing overdose is restricted to general symptomatic and supportive measures. In the event of suspected overdose, medical assistance should be sought immediately.

Q: How long does Catacol stays in your system after you stop taking it?

A: Regulatory pharmacokinetic data indicates that the elimination half-life for Catacol's components is relatively short, typically between 50 and 60 minutes. As a result, the majority of the medicine's metabolites are cleared from the body and recovered in the urine within 8 to 24 hours of administration.

Q: Are there any specific foods or drinks that should be avoided while using Catacol?

A: Patient information distributed by regulatory bodies sometimes advises specific dietary considerations while using Catacol. These often include the need for increased fluid intake, which is recommended to help with certain metabolic effects, and the potential exclusion of highly acidic foods from the diet.

Q: What should I do if the side effects of Catacol feel uncomfortable?

A: The official product information instructs that any severe side effects or the worsening of pre-existing symptoms should be reported to a healthcare provider. They are the resource for providing appropriate management or making necessary adjustments to the treatment plan. Official guidance emphasizes the importance of reporting concerns without discontinuing the medication unless advised to do so.

Q: What is the legal classification of Catacol (e.g., prescription-only or not)?

A: Catacol is officially classified as a prescription-only medicine (Rx-only) in many countries where it is approved for use. This means it can only be legally dispensed with a valid prescription from a licensed healthcare provider. The exact legal status may differ based on local regulatory jurisdiction.

How should Catacol be stored and disposed of?

Storage Conditions and Environment

Catacol (Inosine) must be stored at a temperature below 25 C and must not be refrigerated or frozen. The product requires protection from the environment; it must be kept protected from light and shielded from moisture.

Packaging and Child Safety

The medicine should remain in its original container throughout storage. For solutions, official labeling may specify a limited shelf-life, such as 3 months after first opening. As a mandatory rule for all medicines, Catacol must be stored out of the sight and reach of children.

Disposal Instructions

Disposal must strictly follow local regulations for pharmaceutical waste. The product must not be disposed of via wastewater or ordinary household rubbish. Unused or expired medication should be returned to a local pharmacy or an official medicine take-back point.

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

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