Stimol

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Stimol

Treatment option: Acidosis, Fatigue

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 Stimol

What is Stimol?

Stimol is a metabolic adjuvant used to manage symptoms of fatigue and physical weakness. It is classified as an anti-asthenic agent, designed to support the body's natural recovery processes during periods of exhaustion or convalescence.

Composition and Active Ingredients

The primary active substance in Stimol is citrulline malate. This compound is a combination of two distinct molecules that play specific roles in cellular metabolism:

  • Citrulline: An amino acid involved in the urea cycle, which helps the body process and eliminate nitrogenous waste products like ammonia.
  • Malate (Malic Acid): An intermediate in the Krebs cycle (citric acid cycle), the primary metabolic pathway responsible for generating energy within the mitochondria of cells.

Mechanism of Action

Stimol functions by supporting metabolic pathways that address the physiological roots of fatigue. During physical exertion or illness, the body may accumulate metabolic byproducts and experience a decrease in energy efficiency.

  1. Metabolic Waste Clearance: By participating in the urea cycle, the citrulline component assists in the detoxification of ammonia, which can accumulate in muscles and contribute to the sensation of tiredness.
  2. Energy Support: The malate component helps facilitate the aerobic production of energy, supporting the recycling of lactate and the synthesis of ATP (adenosine triphosphate), the main energy currency of the cell.

Intended Use

Stimol is utilized for the symptomatic treatment of functional asthenia. This includes various forms of non-pathological exhaustion, such as:

  • Physical fatigue resulting from overexertion.
  • Recovery phases following illness or surgery.
  • Temporary tiredness associated with lifestyle factors or stress.

Unlike stimulants that act on the central nervous system, Stimol focuses on cellular metabolism to help restore the body's baseline energy levels.

Regulatory References

  1. French Public Database for Medicines

What side effects are possible with Stimol?

Official Adverse Reactions and Safety Profile

The safety profile of Citrulline Malate (Stimol) is primarily established through official regulatory documents, which categorize potential adverse reactions based on frequency and system involvement. The documented side effects are typically non-serious, affecting the digestive system.

Classification Detail
Adverse Reaction Category Effects are mainly transient and non-serious, affecting the digestive tract.
Frequency Classification Documented side effects such as epigastric discomfort and nausea are generally classified by regulatory authorities as Uncommon (affecting more than 1 in 1,000 but less than 1 in 100 people).
System-Organ Class The associated adverse reactions, including transient gastric pain, nausea, and vomiting, are grouped under Gastrointestinal disorders in official safety labeling.

Safety-Related Restrictions and Contraindications

Official regulatory labeling defines specific conditions where the medicine must not be used, focusing on constraints related to the active ingredient's role in nitrogen metabolism.

The use of Citrulline Malate is strictly contraindicated in individuals with a known hypersensitivity to the active substance or excipients, or in patients presenting with:

  • Severe Hepatic Insufficiency (severe liver failure).
  • Severe Renal Insufficiency (severe kidney failure).
  • Inherited metabolic disorders of the urea cycle.

Population and Exposure Notes

In terms of exposure patterns, official documentation states that transient gastric pain may be observed at the beginning of the treatment. Additionally, standard regulatory notes regarding safety during pregnancy and lactation indicate that insufficient data are available, which typically guides precautionary avoidance.

Overdose and Emergency Response

Overdose and When to Seek Help

This section strictly reports the officially documented information regarding overdose with Citrulline Malate, based on government regulatory sources.

Documented Overdose Profile

The official Summary of Product Characteristics for Citrulline Malate states that no case of overdose has been reported in regulatory experience. Due to this absence of documented cases, the official profile is limited.

When an overdose is possible, the regulatory documentation indicates a risk for an exacerbation of known side effects. The specific manifestations anticipated as a result of an excessive amount involve gastrointestinal disorders or troubles. These symptoms, which may include slight stomach pain, represent the extent of the formally acknowledged clinical presentation in a potential overdose scenario.

Required Emergency Actions

The regulatory labeling does not specify mandatory immediate emergency actions or the requirement to contact emergency services for an overdose. No specific antidote is listed in the official documentation, nor are specific procedural interventions, such as gastric lavage or activated charcoal, explicitly described in the overdose section.

The regulatory profile is silent regarding specific monitoring or hospital observation requirements. Any concern regarding an excessive intake should be directed to a healthcare professional, as the official regulatory text does not mandate specific emergency responses.

Therapeutic Uses of Stimol

What Stimol Treats: Main Uses and Benefits

Stimol is commonly used for the symptomatic management of various forms of asthenia, or general weakness. This therapeutic focus is applied in contexts involving heightened systemic burden where supportive symptom management is appropriate. The key therapeutic areas include symptomatic relief for functional or temporary asthenia, weakness during convalescence and post-stress recovery, and symptoms related to post-exertional muscle strain.

Symptomatic Relief of General Asthenia and Weakness

This application is intended to help with the widespread feeling of low vitality and unusual tiredness. It helps address symptom clusters that may appear suddenly or fluctuate, providing support that helps ease the overall burden of symptoms associated with these episodes. The medication is commonly used across conditions presenting with temporary or fluctuating symptom patterns of fatigue. “The use of this medication may help to ease the impact of weakness on the patient’s ability to perform routine activities.”

Support During Convalescence and Post-Exertional States

Stimol is relevant in clinical settings marked by the increased discomfort and energy deficit that follows acute physiological stress, such as recovery after serious infections or major surgical procedures. Applied in scenarios where additional management of discomfort is required, it supports patients during difficult episodes by easing distress related to persistent weakness and supports general well-being during symptomatic phases. It is also applied across domains where additional symptomatic support is needed to address symptoms of increased muscular activity.


Quick Fact: Relief for Asthenia
Primary Symptom Targeted: Generalized weakness and persistent tiredness
Common Scenario: Post-infection or post-surgical recovery
Patient Benefit: Easing the overall symptom burden

Regulatory References

  1. French Public Database for Medicines

Eligibility and Restrictions for Use

The official eligibility for using Stimol (Citrulline Malate) is defined by age, known sensitivities, and specific physiological states, as documented in regulatory product information.

Eligibility scope

Category Regulatory Statement
Populations for whom use is allowed Adults, the elderly, and children over 6 years of age are eligible for use.
Populations for whom use is contraindicated Patients with known hypersensitivity to the active ingredient (Citrulline Malate) or to any of the product's excipients.
Age-related eligibility rules Use is limited strictly to individuals 6 years of age and older; children under 6 are not eligible.
Condition-specific eligibility rules The product may be used by diabetic patients due to its sugar-free formulation.
Pregnancy and lactation eligibility status The use status is classified as "not established"; the medicine is not recommended during pregnancy or breastfeeding due to insufficient reliable data.
Eligibility-related restrictions Caution is required for patients on a salt-free diet because each dose unit contains approximately 30 mg of sodium.

Resulting eligibility structure

Official regulatory documents permit the use of Stimol only for individuals 6 years of age and older. Use is absolutely prohibited in any patient with a known hypersensitivity to the ingredients. Furthermore, use is not recommended during pregnancy and lactation due to the absence of established safety data. The label also specifies that patients with diabetes are eligible, while those on a salt-free diet should be aware of the sodium content.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Stimol (Citrulline Malate) is defined by specific statements regarding interaction risk and the documented absence of major restrictions. The available authoritative government data do not suggest the existence of clinically significant interactions with other medicinal products. This classification establishes that no mandatory prohibitions for co-administration with specific drug classes or individual medicines are formally required in the official prescribing information.

Interaction Category Regulatory Status
Documented Drug-Drug Interactions None identified as clinically significant.
Specific Contraindicated Combinations None formally listed.
Pharmacokinetic/Pharmacodynamic Effects No specific enzyme (CYP) or transporter-mediated interactions are documented as causes of clinically significant risk.
Timing Separation Rules No mandatory time separation rules are specified for co-administration.

Regarding interactions with other substances, the product contains a low amount of ethanol (alcohol) in its unit-dose oral solution. The official regulatory documentation explicitly addresses this ingredient, stating that the small quantity of alcohol is not likely to cause any noticeable effect or pose a significant risk of interaction. This formal statement establishes that no specific alcohol-related restrictions are necessary due to the product’s composition. The overall interaction structure is characterized by these explicit regulatory findings.

Mechanism of Action

How Stimol Works: Pharmacodynamic Mechanism

Stimol exerts its physiological effects primarily through two distinct mechanistic domains. The drug acts as a precursor by delivering L-citrulline, which is converted to L-arginine, the direct substrate for Endothelial Nitric Oxide Synthase (eNOS). This action elevates the production of Nitric Oxide (NO) within the vascular endothelium. NO functions as a signaling molecule, inducing the relaxation of vascular smooth muscle, which results in vasodilation (vessel widening). This physiological consequence increases blood flow and the delivery of oxygen and nutrients to peripheral tissues .

Additionally, the L-citrulline component is an intermediate in the Urea Cycle, an essential metabolic pathway. By providing this substrate, the mechanism facilitates the conversion of highly toxic ammonia (a nitrogenous metabolic byproduct) into non-toxic urea for excretion. This process contributes to the regulation of the internal environment by limiting the accumulation of metabolic compounds that can affect cellular function.

Dosage and Administration Information

How to Use Stimol

This section outlines the usage principles for Citrulline Malate (Stimol). The instructions focus strictly on the administration route, standard dosing, frequency, and preparation requirements, and do not contain safety guidance or therapeutic claims.


Official Administration Guidelines

Feature Detail
Route of administration Oral solution, requiring consumption via the mouth.
Preparation The unit-dose sachet or ampoule contents must always be diluted in a glass of water before ingestion.
Frequency The total daily dose is intended to be taken in divided doses (several intakes), spread across the day.
Course Duration Use is typically limited to a maximum course of four weeks (one month).

Labeled Dosing Regimens

Administration is governed by the patient's age, with the contents of each unit containing 1.00 g of Citrulline Malate.

  • Adults: The standard daily dose is 3 sachets or ampoules per day (total 3 g daily), administered in divided intakes.
  • Children over 6 years: The standard daily dose is 2 sachets or ampoules per day (total 2 g daily), also administered in divided intakes.

Usage is restricted to children aged 6 years and above. The formulation is confirmed as sugar-free, making it suitable for diabetic patients, though the 30 mg of sodium per unit should be considered for individuals on salt-restricted diets. This information defines the procedural framework for using the medication.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Stimol

Evidence for Use in Symptomatic Relief of General Weakness (Asthenia)

Stimol (Citrulline Malate) was studied for the symptomatic relief of general weakness or temporary fatigue, a condition often referred to as asthenia. The core evidence relevant to this authorized use consists primarily of older, regulatory-cited research, including controlled studies where participants are randomized. These short-term studies examined patient-reported experiences of fatigue and explored how symptoms change over time in individuals presenting with these complaints.

The research examined outcomes related to patient-reported perceived discomfort and measures reflecting daily functioning. Findings describe patterns observed in the studies, where participants' reported subjective feelings of weakness were monitored during the brief study period. This evidence contributes to the broader evidence landscape regarding symptom patterns in conditions characterized by fluctuating or episodic manifestations of fatigue.

Research on Physical Exertion and Recovery

Research also examined Citrulline Malate in the context of outcomes monitoring physiological strain or stress, particularly in post-exertional muscle strain. This evidence is derived largely from recent systematic reviews, meta-analyses, and randomized controlled crossover trials that was evaluated in healthy, physically active adults.

These studies examined endpoints like muscular endurance—for example, measuring the total repetitions completed in certain strength exercises—and perceived exertion (RPE) during physical activity. Findings were mixed regarding its association with physical performance; while some analyses suggest a pattern related to outcomes reflecting daily functioning or activity level during specific short, high-intensity bouts, findings were mixed or inconsistent when measuring outcomes like muscle soreness or aerobic endurance.

Areas of Uncertainty and Research Gaps

Follow-up durations were limited in the majority of clinical research, resulting in a lack of clarity regarding the patterns associated with its use over extended periods. There is limited information for long-term outcomes or the durability of any observed changes. Furthermore, data for certain groups remain insufficient, including large-scale trials focused specifically on older adults or patients with complex, co-existing chronic conditions. The available findings reflect the specific conditions under which they were conducted and subgroup findings are uncertain.

Frequently Asked Questions (FAQ)

Common questions about Stimol (FAQ)


Q: Can Stimol be used by people recovering from an illness or surgery?

According to official product information, Stimol is indicated for the symptomatic relief of temporary fatigue. This authorized use includes states of weakness or tiredness that may be experienced during convalescence, which is the period of recovery following an infection or other major illness.


Q: How does Stimol differ from an energy drink or caffeine for fighting tiredness?

Stimol is classified as an antiasthenic agent, meaning it works through metabolic processes rather than acting as a strong stimulant. Its documented mechanism involves contributing to the elimination of metabolic waste, like ammonia, and may contribute to metabolic processes related to energy recovery. This function is distinctly different from the mechanism of action used by central nervous system stimulants, such as caffeine.


Q: What kind of research evidence supports the use of Stimol for asthenia?

Research relevant to the authorized use consists primarily of short-term, randomized controlled studies cited by regulatory bodies. These studies have examined the patient-reported experiences of temporary fatigue. Specifically, the research monitored how participants' subjective feelings of weakness changed during the brief study period.


Q: Is Stimol intended for long-term use or only for temporary fatigue?

Official prescribing information specifies that Stimol is indicated for the symptomatic treatment of temporary or functional fatigue. For this reason, the duration of treatment is formally limited to a maximum of four weeks, based on the scope of the available clinical research.


Q: Can Stimol be taken at the same time as other common pain-relief medications?

Regulatory data regarding interactions indicate that there are no clinically significant interactions documented with other medicinal products. Furthermore, official prescribing information does not list any mandatory prohibitions for co-administration with other drug classes, including over-the-counter pain relievers.


Q: What is the recommendation regarding the use of Stimol during pregnancy?

The use status during pregnancy is classified as "not established" by regulatory documents. This classification is due to the lack of sufficient reliable safety data from clinical studies in pregnant individuals. Therefore, official regulatory labeling does not recommend the use of the medicine during pregnancy.


Q: What is the recommendation regarding the use of Stimol while breastfeeding?

Similar to pregnancy, the use status while breastfeeding is classified as "not established" due to insufficient reliable safety data. Because of this absence of established data, official regulatory labeling does not recommend the use of the medicine while breastfeeding.


Q: Are there any special considerations for elderly patients using Stimol?

While the elderly population is included in the approved group of eligible users, official documentation notes a limitation in the available research. Specifically, there is limited information from large-scale clinical trials focused on patients in this age group.


Q: What should be considered if symptoms of asthenia do not improve after the treatment duration?

The maximum authorized duration of treatment is typically limited to four weeks. If the symptoms of temporary fatigue do not improve after this course duration, regulatory documentation indicates that professional evaluation is appropriate.


Q: How does Stimol help with mental fatigue or only physical weakness?

Stimol is officially indicated for general weakness or temporary fatigue. The documented mechanism focuses on supporting metabolic processes and increasing blood flow to peripheral tissues (e.g., muscles). While these are primarily physical effects, official information does not explicitly define or exclude potential effects on mental fatigue.


Q: How is the Citrulline Malate in Stimol thought to work at a cellular level?

The drug's documented mechanism involves two main metabolic actions. It acts as a precursor in the body to produce Nitric Oxide, which helps relax blood vessels (vasodilation). Additionally, it is an intermediate in the Urea Cycle, a process that facilitates the conversion of ammonia (a waste product) into non-toxic urea for elimination.


Q: Is Citrulline Malate the same as L-Citrulline or L-Arginine?

Citrulline Malate is a compound that chemically combines the amino acid L-Citrulline with Malate (malic acid). L-Citrulline is a substance that, when in the body, acts as a precursor that is converted into the amino acid L-Arginine.


Q: Are there any known serious side effects associated with Stimol?

The documented side effects are typically non-serious, affecting the digestive tract, such as mild epigastric discomfort and nausea. These effects are classified as Uncommon, meaning they affect less than 1 in 100 people. Official regulatory labeling does not list any serious adverse reactions with a defined frequency.


Q: Can Stimol cause sleep problems or insomnia?

Official documentation does not list sleep problems or insomnia as documented adverse reactions for Stimol. Furthermore, the product label explicitly states that the medicine is not known to affect the ability to drive or use machinery.


Q: What should a user do if they miss one of the scheduled daily doses?

Official regulatory instructions indicate that if a dose is missed, the recommended practice is to skip that dose and continue with the next scheduled intake. Regulatory guidance specifies that a double dose must not be taken.


Q: Why is the maximum duration of Stimol treatment generally limited?

The treatment course is typically limited to four weeks because official research evidence indicates that follow-up durations were limited in most of the clinical studies cited. This means there is insufficient information available to define the safety and usage patterns associated with its use over extended periods.


Q: Is Stimol used by athletes to enhance muscle performance or reduce fatigue?

Official product information documents indicate that Stimol may be used by athletes for its authorized purpose of general fatigue relief. This use is described in official documents as being related to outcomes reflecting daily functioning or activity level, such as the reduction of muscle fatigue following periods of physical exertion.


Q: Is Stimol effective for chronic fatigue syndrome?

Official regulatory documentation specifies that Stimol is indicated strictly for the symptomatic relief of temporary or functional fatigue (asthenia). The product is not indicated or authorized for the treatment of specific, diagnosed long-term conditions like chronic fatigue syndrome.


Q: Is the acidic nature of the solution a concern?

Official prescribing information notes that the solution has an acid pH. Due to this property, the preparation instructions state that the contents of the sachet or ampoule are required to be diluted in a glass of water before being consumed.


Q: Are there ongoing clinical studies for Stimol?

The active ingredient in Stimol has been, and continues to be, the subject of research in clinical trial settings. Records registered on authoritative government databases, such as the NIH's ClinicalTrials.gov, show that ongoing studies are examining its effects in various populations, such as physically active adults.

How should Stimol be stored and disposed of?

How to Store and Dispose of Stimol

Official regulatory documents define specific requirements for the storage and final disposal of Stimol (citrulline malate oral solution).


Storage Conditions

Stimol must be stored at a temperature that does not exceed 30 C. This condition is required to support the product's labeled shelf-life of 36 months. The medicine must not be used after the expiry date indicated on the packaging.

Child-Safety and Disposal

It is mandatory to keep the medicine out of the sight and reach of children.

For disposal, the product must not be thrown away in the household waste or discarded via the sewage system. Unused or expired Stimol should be returned to a pharmacist for proper disposal, which is the required measure to protect the environment.

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

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