Codetol Infantil

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Codetol Infantil

Method of action: Antitussive Opioid

Treatment option: Cough

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 Codetol Infantil

Quick Facts

Property Description
Active ingredient Codeine (Methylmorphine)
Form Oral Liquid (Syrup or Solution)
Pharmacological class Opioid Analgesic and Antitussive
Common use Symptomatic relief of mild pain and cough
Origin Natural Opioid Alkaloid Derivative

Understanding the Identity and Classification of Codetol Infantil

Codetol Infantil is an oral medicinal preparation whose active ingredient is Codeine, fundamentally classified as an Opioid Analgesic and a Central Nervous System (CNS) Antitussive. This dual classification identifies it as a substance that acts centrally to manage both pain perception and the cough reflex. The active substance, Codeine, is a natural opioid alkaloid derivative, which means it is either extracted or synthesized from the opium poppy. In pharmacological terms, Codeine is considered a prodrug because its therapeutic effectiveness is clinically recognized as reliant upon its metabolic conversion to Morphine by the liver enzyme CYP2D6. This metabolic process is key to Codeine's action in providing symptomatic relief.

The inherent pharmacological profile provides two general, high-level therapeutic uses: the capacity for analgesia to address mild to moderate discomfort, and the ability to suppress the disruptive, involuntary cough reflex. This single-ingredient product is intended for providing comfort by mitigating both pain signals and persistent coughing, typically used in scenarios where a dry, non-productive cough is disrupting rest.

Codetol Infantil: The Unique Form and General Purpose

The specific physical form of Codetol Infantil is an oral liquid, often a palatable syrup or solution, administered via the oral route. The designation "Infantil" is a differentiating factor confirming that the product's formulation, including its precise vehicle and concentration, is explicitly adapted for the pediatric population (children). The active Codeine ingredient is contained within an aqueous vehicle—a water-based liquid—which is essential for creating an acceptable taste and texture for the target audience. This liquid dosage form is crucial as it facilitates flexible, precise measuring and ensures the medication can be easily swallowed by younger patients. The overall general purpose of this specialized formulation is to deliver effective, symptomatic comfort to the Infantil demographic, leveraging the central action of Codeine to reduce the feeling of discomfort and calm a persistent, non-productive cough.

What side effects are possible with Codetol Infantil?

The safety profile of Codetol Infantil, which contains the active ingredient Codeine, is formally documented by regulatory authorities (such as the FDA and EMA) and is primarily characterized by effects on the central nervous and gastrointestinal systems.

Frequency-Classified Adverse Reactions

Adverse reactions are classified by their documented frequency:

  • Very Common: Effects observed most frequently include drowsiness (somnolence) and constipation.
  • Common: Reactions frequently documented include nausea, vomiting, dizziness, and headache.

System-Organ-Class Groupings

Regulatory safety information groups potential adverse reactions by the physiological system they affect:

  • Nervous System Disorders: Includes central effects such as sedation, dizziness, and confusion.
  • Gastrointestinal Disorders: Includes common reactions such as constipation, nausea, and dry mouth.

Serious Safety Considerations

Official labeling documents certain serious risks associated with the active ingredient. The most critical is Respiratory Depression, which is highlighted as a serious, potentially life-threatening event. Serious, though rare, reactions also include Serotonin Syndrome (when combined with specific medicines) and severe hypersensitivity reactions like anaphylaxis.

Population-Specific Safety Restrictions

Regulatory documents place explicit constraints on the use of codeine in specific populations:

  • Pediatric Population: Codeine is contraindicated for pain relief in children under 12 years of age and is restricted in adolescents following certain surgeries (e.g., tonsillectomy/adenoidectomy).
  • Ultra-Rapid Metabolizers: Individuals known to metabolize the active ingredient rapidly (ultra-rapid CYP2D6 metabolizers) face an increased risk of toxicity and severe adverse events, including respiratory depression.
  • Duration-Related Safety: Long-term or repeated exposure carries the documented risk of developing physical dependence and tolerance.

Overdose and Emergency Response

Overdose and When to Seek Help

The officially documented overdose profile for products like Codetol Infantil focuses on severe Central Nervous System (CNS) and respiratory depression, which are recognized as life-threatening risks. These risks are described in regulatory documents from major governmental health agencies.

Documented Overdose Manifestations

Symptoms of a possible overdose include profound sedation, extreme drowsiness, confusion, and slurred speech. More severe and potentially fatal manifestations include slowed or shallow respiratory depression, which can lead to coma and death. Additional effects may include ataxia (loss of coordination), dizziness, pinpoint pupils, and hypotension.

Immediate Emergency Action Required

The most serious risk is life-threatening respiratory depression. Regulatory sources stress that accidental ingestion of even a single dose, especially by a child, can result in a fatal overdose. Due to this risk, the drug's official labeling explicitly advises seeking immediate medical attention for any sign of breathing trouble. This includes slow or shallow breathing, difficulty or noisy breathing, unusual sleepiness, or limpness. If any of these signs are observed, contact emergency medical services (such as calling 911 or poison control) or go to an emergency room at once. Emergency treatment may involve the administration of naloxone to reverse the opioid effects.

Therapeutic Uses of Codetol Infantil

What Codetol Infantil treats: Main Uses and Benefits

The therapeutic application of Codetol Infantil is generally considered relevant for providing supportive symptomatic relief for a specific profile of acute discomfort in older pediatric patients (typically adolescents 12 to 18 years of age). Its primary uses are for managing two distinct types of symptoms. This medication is applied across domains where additional symptomatic support is needed, primarily addressing mild to moderate acute pain and non-productive, persistent cough. It is applied in scenarios where additional management of discomfort is required in situations involving certain distressing symptoms.

Addressing Symptom Clusters

This product is relevant for managing symptom clusters that may become intense or disruptive, such as a dry, hacking cough that creates noticeable interference with rest, and acute physical discomfort. Its antitussive properties are relevant for easing this distressing manifestation, while the analgesic component helps with pain. This combination contributes to improved comfort during periods of heightened symptoms.

“The primary goal of this supportive medication is to assist patients during difficult episodes by easing the symptom load associated with acute illness or discomfort.”

Quick Fact: Relief for Dual Discomfort
Analgesia Focus Supportive relief for mild-to-moderate pain.
Cough Focus Management of non-productive, persistent cough.
Target Benefit Assists with maintaining functional stability and supports rest

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

This section outlines the officially documented population eligibility and restrictions for using the medicine, as defined by government regulatory agencies.

Populations Who Must Not Use the Medicine

Codeine (the active ingredient) is contraindicated in several specific populations due to the risk of life-threatening complications, including respiratory depression:

  • Children Younger than 12 Years of Age for any use.
  • Adolescents younger than 18 years following tonsillectomy and/or adenoidectomy.
  • Patients of any age known to be CYP2D6 ultra-rapid metabolizers.
  • Breastfeeding women, due to the risk of morphine passing into breast milk.
  • Patients with significant respiratory depression or acute/severe bronchial asthma.
  • Patients with gastrointestinal obstruction or concurrent use of MAOIs.

Age-Related and Condition-Based Restrictions

Population Group Eligibility Status (Regulatory Wording)
Adolescents (12–18 yrs) with Compromised Breathing Use is not recommended if the patient has risk factors like obstructive sleep apnea or severe lung disease (FDA).
Organ Impairment Use requires caution in patients with severe hepatic or renal impairment.
Pregnancy May cause fetal harm; prolonged use can result in Neonatal Opioid Withdrawal Syndrome (NOWS).
Older Adults Use requires caution due to increased risk of respiratory depression and age-related organ impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents classify the interaction profile of Codeine (the active ingredient in Codetol Infantil) based primarily on pharmacokinetic metabolic effects and pharmacodynamic reinforcement.

Contraindicated Combinations and Mandatory Restrictions

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is formally contraindicated, and a mandatory separation window of 14 days is required after stopping MAOI therapy. The combination with Mixed Opioid Agonists/Antagonists (such as Pentazocine or Nalbuphine) should also be avoided, as this may officially result in a reduced analgesic effect.

Pharmacokinetic and Pharmacodynamic Interactions

Co-administration with CYP2D6 Inhibitors (e.g., Amiodarone, Quinidine) is a documented pharmacokinetic interaction that increases the plasma concentration of Codeine while decreasing the level of its active metabolite, Morphine, potentially reducing efficacy. Conversely, CYP3A4 Inhibitors may lead to increased Codeine exposure.

Pharmacodynamic reinforcement is observed with Central Nervous System (CNS) Depressants, including Alcohol, Sedatives, and other Opioids, leading to a risk of profound sedation and respiratory depression. Similarly, co-administration with Serotonergic Drugs carries the documented risk of serotonin syndrome.

Population-Specific Restriction

Codeine is officially contraindicated in CYP2D6 Ultra-Rapid Metabolizers. This population-specific restriction is based on the metabolic interaction causing an excessive conversion to Morphine, resulting in dangerous, higher than expected levels and the associated risk of life-threatening respiratory depression.

Mechanism of Action

How Codetol Infantil Works


Enzyme-Dependent Activation and Receptor Engagement

The mechanism of action for Codeine relies on a mandatory enzyme-mediated step: its active ingredient, Codeine, must be converted to the opioid agonist, Morphine, primarily by the liver enzyme CYP2D6. The resulting metabolite then functions by binding to and activating the mu-opioid receptor (MOR), which initiates the core action of the drug.


Central Inhibition of Neural Signaling

Activation of the MOR triggers an inhibitory cascade within the central nervous system, which leads to the hyperpolarization of nerve cells in the spinal cord and brainstem. This process reduces neuronal excitability and significantly reduces the presynaptic release of excitatory signals (neurotransmitters), thereby altering signal transmission in pathways related to sensory information processing and influencing the activity of the brainstem reflex centers.


️ Mechanism Limitations Based on Genetic Variability

The drug's mechanism is fundamentally constrained by the genetic variability of the necessary CYP2D6 enzyme. In individuals who are poor metabolizers, this conversion is inefficient, limiting the generation of the active Morphine metabolite. This constraint limits the full engagement of the mu-opioid receptor, thereby limiting the resulting physiological influence on the targeted central regulatory pathways.

Dosage and Administration Information

How to Use Codetol Infantil

The administration of codeine oral solution is governed by a strict, acute-use protocol that defines the method, dosage calculation, and duration of therapy. The medicine is administered solely via the oral route as a liquid solution or syrup.

Official Administration Guidelines

Guideline Focus Administration Rule
Dosing Calculation Dose is based on the patient's body weight (0.5 mg/kg to 1 mg/kg per dose) for the permitted age group.
Measurement The dose must be measured using a calibrated measuring device (syringe or cup); household spoons are prohibited for accuracy.
Frequency Doses are taken as needed (PRN), with a minimum interval of 4 to 6 hours between administrations.
Duration Limit Treatment for acute symptoms must be limited to the shortest possible duration, not exceeding 3 days in total.

The official protocol mandates starting at the lowest effective dose and requires the subsequent dose to be administered only after the prescribed minimum time interval has passed. The maximum single dose should not exceed 60 mg, and the total daily dose should not exceed 240 mg or 360 mg, depending on the governing standard.

Age-Specific Use Protocol

The usage of codeine oral solution is strictly restricted to specific populations. The medicine is not to be administered to children younger than 12 years of age for any indication. Furthermore, use is not recommended in adolescents (12 to 18 years) who have existing respiratory risk factors or who are recovering from tonsillectomy or adenoidectomy.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Codetol Infantil

Research Evidence for Acute Pain Relief

Research has explored the evaluation of codeine in conditions characterized by fluctuating or episodic manifestations. The evidence base for acute pain is primarily built from Randomized Controlled Trials (RCTs) and Systematic Reviews that combine data from multiple clinical studies. Studies monitored outcomes related to physical discomfort in cohorts of pediatric patients, focusing specifically on adolescents (aged 12 to 18 years) experiencing short-lived acute pain.

These studies observed patient-reported outcomes describing perceived discomfort over defined time intervals. Some research describes patterns related to changes in pain intensity measured, often comparing the medicine or related products against a placebo or other active treatment evaluated in the research. Findings were mixed, with certain studies reporting that measured changes in outcomes related to physical discomfort were not always distinct from patterns observed when non-opioid medications were studied.

The body of evidence is characterized by official sources as Moderate-Low. A key limitation is that study results often apply only to the populations studied because the evidence relies on studies that used combination products, where codeine was observed alongside other active ingredients. Furthermore, follow-up durations were limited, and long-term effects are not fully established.

  • Study Designs and Populations Examined

Studies focusing on episodes where symptoms become more noticeable examined outcomes related to physical discomfort in these populations. Research describes how the evidence for pain was evaluated in adolescents and subgroups experiencing functional limitations due to discomfort.

Research Evidence for Non-Productive, Persistent Cough

Codeine was studied for conditions associated with acute or disruptive episodes, and research has explored whether it is relevant in trials assessing short-term or episodic symptom patterns. The evidence base consists mainly of Systematic Reviews and analyses of historical RCTs that studies monitored. Research describes the observation of outcomes related to physical discomfort, specifically focusing on the outcomes of cough frequency and severity.

The evidence contributing to understanding cough symptom patterns in children is insufficient, and findings were mixed. Scientific consensus, as reflected in regulatory reviews, notes that the evidence contributing to understanding cough symptom patterns in children is insufficient. The studies contribute to the broader evidence landscape, and the overall evidence level is formally characterized as Low. Limited information is available for certain outcomes linked to inflammatory or irritative states in this population.

  • Review of Available Scientific Literature

Research examined temporary physiological imbalance, and the literature highlights what is known—and what is still uncertain. Studies help show what has been observed so far, but comparative evidence is lacking.

Research Evidence in Specific Patient Groups

Codeine was evaluated in certain subgroups of pediatric patients, primarily adolescents (aged 12 to 18 years). A key research limitation is the known genetic variability that affects how individuals process codeine. Studies exploring this temporary physiological imbalance describe how observed outcomes in some studies was associated with an individual’s specific rate of metabolism. Research highlights that results apply only to the populations studied. Findings describe group patterns, and research does not determine whether an individual will experience similar observed patterns due to this known variability.

What is Still Uncertain About the Research for Codetol Infantil

The certainty remains low across several domains. The evidence quality varies across studies, and comparative evidence is lacking. Data for certain groups, particularly younger pediatric patients, remain insufficient. There is limited information for long-term outcomes, and research is ongoing. Evidence highlights what is known—and what is still uncertain.

Key Studies & References

  1. Codeine Drug Information (Classification, Prodrug Status, Uses)
  2. Systematic Review of Codeine for Acute Cough in Children (Assessment of RCTs and Low Evidence Level)

Frequently Asked Questions (FAQ)

Common questions about Codetol Infantil (FAQ)


Q: What is the main difference between Codetol Infantil and other over-the-counter medicines for children?

Official sources classify the active ingredient in Codetol Infantil as an opioid analgesic (for pain relief) and a Central Nervous System (CNS) antitussive (for cough suppression). This classification identifies it as acting on the central nervous system, which distinguishes it from non-opioid medications like ibuprofen or acetaminophen.


Q: How quickly should I expect Codetol Infantil to start working after use?

Pharmacokinetic data summarized in regulatory-aligned information indicate that the influence of the active ingredient is typically observed to begin between 20 to 60 minutes after use. The time it takes to see an influence can vary significantly between individuals due to documented metabolic differences.


Q: What is the typical duration of the effects of Codetol Infantil?

The therapeutic effects of the active ingredient are typically observed to diminish within 2 to 3 hours after administration. Official use conditions stipulate a minimum interval of 4 to 6 hours between administrations, aligning with the expected duration of effect.


Q: Why is it important to know a child's weight before using Codetol Infantil?

The required amount of medicine a patient receives is directly linked to their body size. Regulatory documents confirm that the dose is calculated based on the patient's body weight (as mg/kg) to ensure appropriate exposure. This calculation is part of the official protocol described for use in the permitted age group.


Q: Why do official documents mention 'restricted use' for certain age groups with Codetol Infantil?

Restrictions for children under 12 and adolescents following certain surgeries are imposed due to the serious risk of life-threatening respiratory depression. This risk is heightened because the active ingredient is variably converted into a more potent substance (morphine) within the body.


Q: Are there long-term side effects noted in studies for children using Codetol Infantil?

Official evidence reviews indicate that follow-up durations were limited in studies, meaning that long-term effects are not fully established for the pediatric population.


Q: What kind of studies support the use of Codetol Infantil in very young children?

Regulatory consensus formally notes that the evidence base is insufficient for certain outcomes in younger pediatric patients. The majority of studies that contribute to the current evidence focus primarily on the adolescent population (ages 12 to 18).


Q: Are the safety studies on Codetol Infantil based on long-term data?

No. Regulatory documents formally state that the body of evidence includes the limitation that follow-up durations were limited. This means that the long-term effects are not fully established based on the existing safety studies.


Q: Are there specific warning signs of a serious side effect from Codetol Infantil?

Serious adverse effects like respiratory depression are documented as a critical risk. Warning signs can include slow or shallow breathing, extreme sleepiness or confusion, and a notable change in pupil size (small pupils). Official safety documents indicate that these signs may warrant immediate emergency medical attention.


Q: What are the official recommendations if a dose is accidentally missed?

Regulatory-aligned information describes that for products taken as needed (PRN), the protocol is to skip the missed administration and continue with the original schedule. The instruction is not to administer extra product.


Q: Are there any specific foods or drinks that should be avoided when a child is using Codetol Infantil?

The use of alcohol is explicitly cited in official documents for its risk of causing profound sedation and respiratory depression when combined with the medicine. This is due to a reinforcing effect on the central nervous system.


Q: Can Codetol Infantil be used for conditions not listed on the packaging?

Official documents define the indicated uses for the drug's symptomatic relief. The discussion of any use other than what is officially indicated is strictly forbidden in patient-facing material under regulatory guidelines.


Q: What happens if a child takes Codetol Infantil close to their bedtime?

The most common documented adverse reactions related to this medicine include drowsiness and sedation. These are expected effects related to its action on the central nervous system.


Q: Is Codetol Infantil available only by prescription, or can it be bought without one?

The active ingredient, Codeine, is a classified controlled substance. Its dispensing status (whether it requires a prescription or can be purchased over-the-counter) is governed by national regulatory schedules, and it typically requires formal authorization.


Q: What should be done if an accidental extra dose of Codetol Infantil is given?

Official documents emphasize that accidental ingestion can result in a fatal overdose, and the protocol is to seek immediate emergency medical services or contact poison control.


Q: Are there any restrictions on activity or exercise while a child is using Codetol Infantil?

Official warnings regarding the potential for drowsiness, dizziness, and sedation advise caution. The guidance advises against activities that require high mental alertness (such as driving or operating machinery for older adolescents) while experiencing these effects.


Q: Is the purpose of Codetol Infantil to treat symptoms or the underlying cause?

The drug's official purpose is defined as providing symptomatic relief for mild to moderate discomfort and suppressing the cough reflex. Its action is focused on symptomatic relief and suppressing the cough reflex.


Q: What types of drug-drug interactions are considered high risk for Codetol Infantil?

The highest risk interactions are contraindicated combinations cited in official documents. These include use with Monoamine Oxidase Inhibitors (MAOIs) and co-administration with other medications that cause CNS Depressants (such as sedatives or alcohol).


Q: Can Codetol Infantil affect the results of routine pediatric blood tests?

Regulatory-aligned information notes that a healthcare provider may decide that blood tests are needed to check for unwanted effects during use. This suggests a potential for the medicine to influence or alter patient laboratory values.


Q: Are there any genetic factors that influence how a child responds to Codetol Infantil?

Yes, the action of the drug is fundamentally influenced by the genetic variability of the CYP2D6 enzyme. This enzyme is responsible for converting the medicine to its active form, and the rate of conversion affects the overall response.


Q: Do government health organizations recommend Codetol Infantil as a first-line treatment?

Regulatory documents state that use is restricted to cases where symptoms cannot be relieved by other non-opioid medications (such as paracetamol or ibuprofen). This aligns with the regulatory statement that the medicine should be used only if symptoms cannot be relieved by other non-opioid medications.


Q: Is it possible for Codetol Infantil to cause a temporary change in a child's appetite?

Documented adverse reactions that are commonly or frequently observed include nausea, vomiting, and a temporary lack of appetite. These effects are generally related to the drug's impact on the gastrointestinal system.


Q: Do regulatory agencies require special monitoring for children using Codetol Infantil?

Regulatory-aligned information emphasizes that a healthcare provider should check the patient's progress and monitor the child closely. Close monitoring is particularly stressed within the initial 24 to 72 hours of treatment.


Q: If a child has a history of asthma, is Codetol Infantil still a suitable option?

Regulatory documents note that the medicine is contraindicated in cases of acute or severe bronchial asthma. The drug is restricted in patients with compromised respiratory function.


Q: Is the medication designed to be used only as needed, or on a schedule?

The official protocol specifies that doses are to be taken as needed (PRN) to manage temporary symptoms. There is a required minimum interval between administrations, and treatment must be limited to a short duration.


Q: Does Codetol Infantil interact with common herbal remedies used by parents?

Regulatory-aligned public guidance notes that it is generally not possible to state herbal remedies are safe for use with this medicine. This is because herbal products are typically not tested for interactions with prescription medicines in the same way.


Q: How does Codetol Infantil affect a child's stomach?

The most common effects on the gastrointestinal system documented in official reports include constipation, nausea, and vomiting. These are classified as very common or common adverse reactions.

How should Codetol Infantil be stored and disposed of?

How to Store and Dispose of Codetol Infantil?

Codetol Infantil, a codeine-containing oral liquid, requires specific regulatory storage and disposal to maintain stability and ensure safety.


Official Storage Requirements

The medicine must be stored at Controlled Room Temperature, typically 20 C to 25 C, with limited allowances for excursions up to 30 C. It must be kept in a tight, light-resistant container and protected from light and excess moisture. A mandatory warning is to Keep out of reach of children and store the product securely, as accidental ingestion can be fatal.


Official Disposal Instructions

Unused or expired medication must be properly disposed of by following local state guidelines or utilizing an official drug take-back program. Secure disposal is required for this controlled substance to prevent diversion or misuse.

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

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