Efferalgan Codeine

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Efferalgan Codeine

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 Efferalgan Codeine

What is Efferalgan Codeine? (Overview)

Property Description
Active Ingredients Acetaminophen (Paracetamol) and Codeine Phosphate
Form Oral (Tablet, Effervescent Tablet, Solution)
Pharmacological Class Non-opioid and Opioid Analgesic Combination
General Purpose Management of moderate to severe pain, and fever reduction
Origin Synthetic (Acetaminophen) and Semisynthetic (Codeine)

Efferalgan Codeine is a defined fixed-dose combination product used for analgesic and antipyretic relief, comprising two distinct active ingredients. Codeine is classified as an opiate and is listed in combinations with non-opioid analgesics. The combination of ingredients is clinically recognized for its ability to effectively manage significant discomfort, positioning it above standard non-opioid pain relievers.

Definition and Pharmacological Classification

Efferalgan Codeine is a combination analgesic classified as a blend of Acetaminophen (Paracetamol) and Codeine phosphate. This classification reflects its dual-action capacity, wherein Acetaminophen provides non-opioid pain and fever relief, and Codeine belongs to the opioid analgesic group. The product is frequently associated with the brand marketing and distribution of UPSA. Its high-level pharmacological classification is designated for Opioids in combination with non-opioid analgesics (ATC code N02AJ06).

Composition and Available Forms of the Combination Drug

The medicine’s composition relies on Acetaminophen, a widely used synthetic compound, and Codeine, a semisynthetic opioid derived from the opium poppy alkaloid Morphine. This pairing is formulated to achieve a synergistic effect in pain management. Efferalgan Codeine is primarily administered via the oral route and is often known for its effervescent tablet form, which facilitates rapid dissolution. It is also available as a film-coated tablet and an oral solution, offering suitable options for different patient groups.

General Purpose and Dual Mechanism of Action

The general therapeutic purpose of this medication is to address moderate to severe pain, such as post-surgical discomfort or persistent pain associated with conditions like severe headaches, alongside its additional fever-reducing property. The product’s effectiveness is rooted in its dual mechanism of action: Acetaminophen affects central and peripheral signaling, while Codeine is converted by the body into Morphine to engage μ-opioid receptors in the central nervous system, thereby modifying the brain's response to pain. This ensures the medication targets discomfort through two complementary physiological pathways, providing a recognized step-up in analgesia.

What side effects are possible with Efferalgan Codeine?

Possible Side Effects and Safety Information

The safety profile of the Acetaminophen (Paracetamol) and Codeine combination is officially documented by global regulatory authorities and is classified based on the effects of both active ingredients. Adverse reactions are organized by frequency and the body systems affected.


Documented Adverse Reactions

Adverse effects are grouped into system-organ classes (SOC) with varying frequency. The most frequently reported effects (Common) primarily involve the central nervous and gastrointestinal systems.

System-Organ Class (SOC) Common Adverse Reactions
Nervous System Drowsiness (Somnolence), Lightheadedness, Dizziness
Gastrointestinal Constipation, Nausea, Vomiting

Other adverse reactions that are documented but occur less frequently include headache, confusion, skin rash, itching (pruritus), and difficulty urinating.


Serious Adverse Reactions and Key Constraints

Official labeling highlights the potential for serious adverse reactions, which include:

  • Life-Threatening Respiratory Depression: The most serious risk associated with the Codeine component, particularly at the start of treatment or following a dose increase.
  • Hepatotoxicity (Severe Liver Damage): A dose-dependent risk linked to the Acetaminophen component, often associated with exceeding the maximum recommended dose.
  • Addiction and Dependence: Prolonged, regular use of the Codeine component carries the risk of physical dependence and addiction.

Population-Specific Contraindications are strict regulatory restrictions on the use of this medication in certain groups. It is contraindicated for any use in children under 12 years of age and for use in breastfeeding mothers due to the potential for severe harm to the infant. Use is also restricted for patients who are known as Ultra-Rapid Metabolizers of Codeine or who have Severe Hepatic Insufficiency.

Overdose and Emergency Response

Overdose and When to Seek Help

The official overdose profile for Efferalgan Codeine is defined by the dual toxicity risks of its active components. Manifestations of overdose from the Codeine component include life-threatening signs such as profound sedation, stupor, confusion, loss of consciousness, and severe respiratory depression, which may present as slowed or stopped breathing. Regulatory documents highlight that overdose from the Acetaminophen component carries the critical risk of delayed, acute liver failure, which may initially be asymptomatic or involve symptoms like nausea and vomiting. Documented life-threatening outcomes include fatal respiratory depression, coma, convulsions, and acute organ failure.

Government guidance explicitly mandates that immediate medical attention must be sought for any suspected overdose, regardless of whether the patient currently exhibits symptoms, due to the risk of delayed, serious liver damage. Contacting emergency services or a poison control center right away is the required action. Emergency management requires component-specific interventions, including the administration of Naloxone for opioid effects and N-acetylcysteine for Acetaminophen toxicity. Regulatory notes indicate a risk of fatal overdose with accidental ingestion, particularly in children. Hospital monitoring of vital signs and laboratory testing is a required procedure for management.

Therapeutic Uses of Efferalgan Codeine

What Efferalgan Codeine Treats: Main Uses and Benefits

The therapeutic application of Efferalgan Codeine is centered on providing relief for pronounced symptomatic distress that standard over-the-counter pain relievers often fail to fully address. The use of codeine-containing medicines is relevant when supportive symptom management is appropriate, particularly when pain is not adequately relieved by other analgesics.

Support for Symptomatic Relief

This combination is commonly used to help manage moderate to severe pain, which includes symptoms that create noticeable physiological strain arising from conditions such as acute dental procedures, postoperative recovery, or intense musculoskeletal episodes. It is applied in clinical settings that involve acute or unstable symptom patterns, providing supportive relief when symptoms interfere with routine activities.

The primary therapeutic focus is pain and fever relief in conditions characterized by periods of heightened symptoms, including intense headaches, post-traumatic discomfort, and pain associated with episodic inflammatory states. The combination is applicable in addressing both symptoms related to physical discomfort and concurrent symptoms related to systemic imbalance (fever), contributing to easing the overall symptom load.


Quick Fact: Relief for Refractory Discomfort The combination is commonly used when symptoms may not be fully managed by standard treatments, offering symptomatic relief that helps patients cope more steadily with challenging episodes.

Regulatory References

  1. European Medicines Agency (EMA)

Eligibility and Restrictions for Use

Who Can and Cannot Use Efferalgan Codeine? (Population Eligibility)

The eligibility for Efferalgan Codeine is strictly defined by regulatory authorities based primarily on risks associated with its Codeine component, a common opioid.

Official Eligibility and Contraindicated Populations

Population Status Regulatory Rule Rationale Basis
Allowed Adults and adolescents 12 years for short-term, moderate pain not relieved by other analgesics. Approved age range; restricted use.
Contraindicated Children under 12 years of age. Risk of opioid toxicity/unpredictable metabolism.
Contraindicated Women who are breastfeeding. Risk of morphine transfer to the infant.
Contraindicated Known CYP2D6 ultra-rapid metabolizers. Risk of life-threatening morphine overdose.

Condition-Based Restrictions

Use is prohibited for patients with severe hepatocellular insufficiency or severe respiratory depression. These conditions are absolute contraindications detailed in official labeling.

Conditional use is required for several groups:

  • Adolescents (12-18 years): Use is not recommended for pain management after tonsillectomy or adenoidectomy for sleep apnea.
  • Elderly Patients: Use requires caution due to increased sensitivity to central nervous system effects.
  • Organ Impairment: Patients with severe renal or moderate hepatic impairment must be carefully evaluated for restricted use.

What should I know about interactions with other medicines?

The official regulatory profile for Efferalgan Codeine establishes several classifications for documented interactions with other medicines and substances.

Contraindicated Combinations and Timing Rules

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is formally contraindicated, and a mandatory 14-day period must separate the discontinuation of an MAOI before starting this product. Use is also contraindicated in individuals classified as CYP2D6 Ultra-Rapid Metabolizers due to the officially documented risk of converting codeine to high, toxic levels of morphine. Co-administration with other codeine or acetaminophen-containing products is restricted to prevent overdose risk.

Clinically Significant Pharmacodynamic Interactions

Profound pharmacodynamic interactions occur when Efferalgan Codeine is combined with Alcohol (Ethanol) and other Central Nervous System (CNS) Depressants (e.g., sedatives, tranquilizers, other opioids). This co-administration carries an officially documented risk of severe additive effects, including respiratory depression and profound sedation. Official documents also note the potential for Serotonin Syndrome when combined with serotonergic drugs.

Metabolic and Exposure Alterations

Pharmacokinetic interactions involving the CYP2D6 enzyme pathway may result in a reduced analgesic effect if strong enzyme inhibitors (such as certain antidepressants) are co-administered. Furthermore, the acetaminophen component has a documented interaction with oral anticoagulants (e.g., Warfarin), which may increase the anticoagulant effect and necessitates patient monitoring for altered coagulation parameters. Caution is also advised for patients with severe hepatic or renal impairment due to potentially slower clearance of the medicine.

Mechanism of Action

Efferalgan Codeine combines two distinct pharmacological agents—paracetamol and codeine—to modulate physiological processes through separate mechanisms.

Opioid Receptor Modulation (Codeine)

Codeine, a prodrug, undergoes hepatic bioactivation via the CYP2D6 enzyme system to yield its active metabolite, morphine. Morphine functions as an agonist at central mu-opioid receptors (mu-OR) located in the brain and spinal cord. This receptor engagement initiates an intracellular cascade that inhibits ascending nociceptive signaling pathways by decreasing the release of specific neurotransmitters and promoting neuronal hyperpolarization. This mechanism leads to a system-level modification of signal propagation through central nociceptive tracts.

Central Prostaglandin Synthesis Modulation (Paracetamol)

Paracetamol acts predominantly within the central nervous system (CNS) to influence cellular signaling. It is believed to inhibit prostaglandin synthesis in the CNS, likely through the modulation of cyclooxygenase (COX) enzymes, particularly COX-2. This action modulates the activity of central cyclooxygenase enzymes and influences processes regulated by these local mediators. Furthermore, paracetamol acts by inhibiting the hypothalamic heat-regulating center in the brain, which initiates mechanisms promoting heat dissipation, thereby facilitating thermoregulatory responses.

Dosage and Administration Information

How to Use Efferalgan Codeine: Official Administration Guidelines

The usage of Efferalgan Codeine, a combination analgesic, is defined by instructions regarding route, dosage, frequency, and duration. It is primarily administered via the oral route, available as tablets, effervescent tablets, and oral solutions.

Dosing and Scheduling Constraints

Administration is on an as-needed (PRN) basis. The typical adult dose is one to two tablets per intake, with a mandated minimum interval of 4 to 6 hours between administrations.

Crucial maximum dose limits must not be exceeded: the total daily intake of the Acetaminophen (Paracetamol) component must not exceed 4,000 milligrams (4 grams) in a 24-hour period.

Procedural and Duration Instructions

For the effervescent form, the tablet must be fully dissolved in water before ingestion. For all acute pain management, treatment duration is strictly limited to a maximum of 3 consecutive days. Guidelines mandate using the lowest effective dosage for the shortest duration necessary.

Population-Specific Use

Use is contraindicated in children younger than 12 years of age. Furthermore, dose intervals must be extended for patients with confirmed renal or hepatic impairment to prevent drug accumulation, as prescribed in the product labeling. Physical dependence may develop with long-term use, requiring the dose to be tapered gradually upon cessation to avoid abrupt withdrawal.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Efferalgan Codeine

Evidence for Use in Acute Postoperative and Dental Pain

The core body of research examining the combination of Acetaminophen and Codeine research examined how outcomes related to physical discomfort change in acute pain. This is relevant in trials assessing short-term or episodic symptom patterns. Many findings were observed in trials used in research exploring short-term symptom changes following surgical procedures, including dental extractions. The available evidence is structured around comprehensive systematic reviews and meta-analyses that pool results from multiple controlled clinical trials (RCTs).

These studies research examined short-term analgesic outcomes. The studies monitored changes in pain intensity over short periods, often tracking composite scores and the proportion of participants who reached a predefined level of pain reduction. Findings describe patterns observed in the studies where measured outcomes related to physical discomfort was observed in the groups receiving the combination. When compared against the Acetaminophen component alone, data show patterns related to an incremental difference in the measured outcomes related to physical discomfort during the study period.

Evidence for Use in General Moderate to Severe Acute Pain

Research into the general management of acute or disruptive episodes of moderate to severe pain was evaluated in various settings, including those related to musculoskeletal or post-traumatic discomfort. This research involves studies that explore short-term symptom changes in conditions where symptoms may vary in intensity. Studies explored how the combination was associated with outcomes related to functional capacity in the short term, often compared to non-opioid pain relief options.

Study Duration and Research Gaps

The overall structure of the research base is weighted toward short-term observation. The clinical trials providing the foundational data were studied for immediate changes, and follow-up durations were limited, often to a single day or less. Therefore, long-term effects are not fully established for the combination. Evidence is limited regarding the durability of any observed changes in outcomes related to general well-being or daily functioning over extended periods.

A significant limitation is that the predictability of the medicine's outcome may vary due to the individual differences in metabolic capacity required to activate the Codeine component. This means the research provides context but not individual predictions. Data are still emerging for the use of the combination in chronic conditions, such as neuropathic pain or long-term back pain, and comparative evidence is lacking.

Frequently Asked Questions (FAQ)

Common questions about Efferalgan Codeine (FAQ)

Q: What is Efferalgan Codeine and what is it indicated to help manage?

Efferalgan Codeine is a combination medication containing paracetamol (acetaminophen) and codeine, which is an opioid analgesic.

It is indicated for the temporary management of mild to moderate acute pain in adults and children over 12 years of age, but only when other types of common pain relievers, such as paracetamol or ibuprofen alone, have not been successful in managing the pain.


Q: How does the codeine component of the drug work?

Codeine is metabolized in the body into morphine, which then acts on the central nervous system. This action is associated with a reduction in the perception of pain.


Q: What are some of the potential common side effects of this medication?

Reported common side effects may include:

  • Drowsiness, feeling relaxed, or dizziness
  • Nausea and vomiting
  • Constipation
  • Headache

Contact a healthcare professional if any side effects are persistent or concerning.


Q: Is there a risk of dependence or addiction with Efferalgan Codeine?

Yes. As an opioid-containing medication, there is a risk of developing physical dependence and addiction (substance use disorder), especially when the medication is used at high doses or for a long period of time. This risk applies even when taken exactly as directed.

Healthcare providers monitor this risk closely during treatment.


Q: Who should generally not take Efferalgan Codeine?

This medication is not suitable for everyone. It should not be used by:

  • Children younger than 12 years of age.
  • Individuals with known severe breathing difficulties or severe asthma.
  • People who have had surgery to remove tonsils and/or adenoids due to obstructive sleep apnea (OSA).
  • Women who are breastfeeding, as codeine can pass into breast milk and may cause serious harm to the infant.
  • Individuals who are known to be 'ultra-rapid metabolizers' of codeine due to a specific genetic difference (CYP2D6 ultra-rapid metabolizers), as this can lead to very high levels of morphine in the body and potentially fatal breathing problems.

Consult a healthcare professional for a complete review of contraindications.

How should Efferalgan Codeine be stored and disposed of?

Official Storage and Disposal Requirements

Efferalgan Codeine (Paracetamol/Codeine) must be stored according to regulatory labeling to maintain its stability and ensure safe handling.

Storage Category Official Requirement
Temperature & Environment Store below 25 C or at controlled room temperature, protected from heat and moisture.
Packaging Keep the medicine in its original container, protected from light, and do not use after the expiry date.
Security Due to the codeine content, always keep the product strictly out of the sight and reach of children.
Disposal Do not dispose of expired or unused medicine in household trash or wastewater (sink/toilet). Return it to a pharmacy or a designated drug take-back program for safe disposal, as required by official pharmaceutical-waste protocols to protect the environment.

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

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