Compralgyl (Acetaminophen,Codeine)

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Compralgyl (Acetaminophen,Codeine)

Medically reviewed

Marina Burgos

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 Compralgyl (Acetaminophen,Codeine)

Quick Facts

Property Description
Active Ingredients Acetaminophen, Codeine (as a salt, e.g., phosphate)
Form Oral solid form (e.g., tablet)
Pharmacological Class Analgesic combination (Opioid and Non-opioid)
General Purpose Management of moderate pain to severe pain
Origin Synthetic (Acetaminophen) and Semi-synthetic (Codeine)

What Type of Medicine is Compralgyl (Acetaminophen, Codeine)?

Compralgyl is an oral prescription drug classified as a fixed-dose combination product designed for enhanced pain management. This preparation is formally categorized as an analgesic combination, structurally uniting two distinct active compounds to treat pain, typically reserved for conditions where single-agent analgesics are insufficient. The medicine is delivered in an oral solid form, such as a tablet, which is swallowed for systemic delivery of the active ingredients. These combination products are commonly used for short-term pain relief. Similar formulations are known under names like Co-codamol in various global markets, highlighting the combination's widely clinically recognized utility for acute pain management.


Composition and Origin: Is Compralgyl a Combination of Opioid and Non-Opioid Agents?

Yes, Compralgyl is defined by its two active ingredients: Acetaminophen (Paracetamol) and Codeine (Methylmorphine), pairing a non-opioid with an opioid analgesic. Acetaminophen is a synthetic compound known primarily for its pain-relieving and fever-reducing effects. Codeine, by contrast, is classified as a semi-synthetic derivative of morphine, and is an opioid analgesic that provides a potent central action component. This dual-class composition places the drug within a specific therapeutic class for addressing moderate pain or severe pain, such as post-operative discomfort. This combination is effective for acute pain, and the paired ingredients work to reduce acute discomfort.


General Purpose: What is the Main Benefit of Combining Acetaminophen and Codeine?

The main benefit of combining Acetaminophen and Codeine is achieving analgesic synergy, which results in a more potent pain-relieving effect than either drug could deliver alone. This strategic combination ensures the drug operates through a biphasic mechanism, whereby the Acetaminophen component addresses pain-mediating chemicals at a peripheral and central level, while the Codeine component modifies the pain signal and its interpretation within the central nervous system. This comprehensive approach is the core function for which the medicine is prescribed for severe pain where single-target analgesics are insufficient.

Regulatory References

  1. MedlinePlus: Acetaminophen and Codeine

What side effects are possible with Compralgyl (Acetaminophen,Codeine)?

Possible Side Effects and Safety Information

The safety profile of this fixed-dose combination reflects the adverse reactions associated with both its opioid (Codeine) and non-opioid (Acetaminophen) components, as documented in official regulatory labeling.

Common Adverse Reactions and Systemic Effects

Side effects categorized as Common or Frequently Reported primarily involve the Central Nervous System and Gastrointestinal systems. These include drowsiness, lightheadedness, dizziness, sedation, nausea, vomiting, and constipation. Other documented effects include pruritus (itching) and rash affecting the skin, and shortness of breath affecting the respiratory system. Certain CNS effects, such as sedation, may be more pronounced upon initial use and can diminish with continued exposure, a pattern explicitly noted in regulatory documents.

Serious Adverse Reactions

The official labeling documents the potential for Serious Adverse Reactions. These include the risk of life-threatening respiratory depression, a recognized danger of the opioid component. Additionally, the acetaminophen component is associated with a risk of severe hepatic injury (acute liver failure) and severe skin reactions.

Population-Specific Safety Considerations and Restrictions

Safety notes specify that older adults may have heightened sensitivity to the medicine’s effects, necessitating caution regarding CNS and respiratory depression. Individuals with hepatic or renal impairment also face increased risk due to altered drug clearance. Furthermore, the medicine is officially subject to safety constraints due to the potential for physical dependence and abuse associated with its codeine content, which is a key regulatory limitation.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for an overdose involving Acetaminophen and Codeine emphasizes the risk of two distinct, life-threatening toxicities. Immediate medical attention must be sought for any suspected overdose, even if no symptoms are present.

Documented Manifestations and Outcomes Overdose manifestations relating to the Acetaminophen component initially include nausea, vomiting, anorexia, and abdominal pain, progressing to severe outcomes like hepatic necrosis and acute liver failure. The Codeine component presents with signs of central nervous system (CNS) depression, such as extreme drowsiness, stupor, confusion, miosis, and shallow or slow breathing, leading to potential respiratory arrest and circulatory collapse. Severe outcomes documented in regulatory sources include coma and death.

Mandated Emergency Action Governmental prescribing information requires contacting emergency services or a Poison Control Center immediately following any suspected ingestion of an excess dose. Management in a hospital setting may involve the administration of specific antidotes: N-acetylcysteine (NAC) for Acetaminophen toxicity and Naloxone for the opioid component, alongside required monitoring of vital signs. Regulatory information also notes increased risk of liver damage in chronic alcohol users and heightened risk of life-threatening respiratory depression in children.

Therapeutic Uses of Compralgyl (Acetaminophen,Codeine)

What Compralgyl (Acetaminophen, Codeine) Treats: Main Uses and Benefits

Compralgyl is a combination medication used to relieve pain. It is commonly used when short-term symptomatic assistance is needed to address moderate to severe pain that remains unresponsive to standard non-opioid pain relievers. This medicine is applied across domains where additional symptomatic support is needed, particularly in conditions characterized by periods of heightened symptoms following acute incidents.

This dual-component analgesic is typically used for managing post-operative discomfort, pain from acute musculoskeletal injuries such as strains and sprains, and intense post-procedural dental pain. It helps address symptom clusters that create noticeable physiological strain, including physical discomfort that may be clustered with systemic imbalance (fever). It contributes to easing the overall symptom load during difficult episodes.

This medicine is relevant for easing intense, short-term discomfort, supporting the patient during episodes of heightened symptoms.

It contributes to improved comfort by providing a level of relief that supports functional stability when routine activities are otherwise disrupted by pain.


Quick Fact: Relief for Acute Pain Aspect Description
Symptom Level Moderate to severe pain
Key Scenarios Post-trauma, post-procedure (short-term)
Benefit Eases overall symptom load, supports comfort

Regulatory References

  1. NIH MedlinePlus Overview

Eligibility and Restrictions for Use

Who can and cannot use Compralgyl (Acetaminophen, Codeine)?

The eligibility for Compralgyl (Acetaminophen, Codeine) is strictly defined by regulatory guidelines, primarily restricting use based on age, metabolic status, and underlying health conditions. The medicine is generally permitted for adults and adolescents 12 years of age and older.

Absolute Contraindications

Absolute non-eligibility is defined for several groups. This includes children under 12 years and all patients under 18 following tonsillectomy or adenoidectomy. The drug is contraindicated for individuals known to be CYP2D6 ultra-rapid metabolizers and for women during breastfeeding due to the risk of toxicity. Use is also strictly prohibited in patients with severe hepatic insufficiency, circulatory shock, or significant acute respiratory depression.

Conditional Use and Restrictions

Conditional use applies to other populations. Patients with severely impaired kidney or liver function must use the medicine with caution, often requiring dose modification. Use during pregnancy is advised at the lowest effective dose for the shortest duration, with extended use cautioned against due to the risk of Neonatal Opioid Withdrawal Syndrome. Certain comorbidities, such as increased intracranial pressure, also necessitate a cautious approach.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The use of this combination product with other medicines must be carefully evaluated due to the risks associated with both the codeine and acetaminophen components.

Codeine-Related Interactions (Opioid Component)

Central Nervous System (CNS) Depressants Concomitant use with alcohol, benzodiazepines, other opioids, sedatives, hypnotics, tranquilizers, or general anesthetics can lead to additive CNS depression, resulting in profound sedation, respiratory distress, coma, and potentially fatal outcomes.

Enzyme Metabolism Inhibitors/Inducers Codeine is metabolized by the enzyme CYP2D6 to its active metabolite, morphine. Co-administration with strong CYP2D6 inhibitors (e.g., quinidine, certain antidepressants) may reduce the conversion of codeine to morphine, leading to reduced pain relief. Conversely, CYP3A4 inhibitors may also have complex effects on codeine and morphine concentrations. The product is contraindicated in patients known to be ultra-rapid CYP2D6 metabolizers due to the risk of life-threatening respiratory depression from excessive morphine levels.

Other Serious Interactions This product is contraindicated with Monoamine Oxidase Inhibitors (MAOIs), or within 14 days of stopping MAOI therapy, due to the risk of enhancing respiratory depression. Co-administration with Serotonergic Drugs (e.g., SSRIs, SNRIs, triptans) may result in the life-threatening condition serotonin syndrome.

Acetaminophen-Related Interactions

Other Acetaminophen Products Do not use this product with any other medicine (prescription or over-the-counter) that contains acetaminophen. Exceeding the maximum recommended daily dose of acetaminophen, even slightly, carries a significant risk of severe, potentially fatal hepatotoxicity (liver damage).

Warfarin Regular or prolonged use of acetaminophen, particularly at higher doses, may potentiate the anticoagulant effect of Warfarin and other Vitamin K antagonists, increasing the risk of bleeding. Close monitoring is advised if these medicines are used together.

Mechanism of Action

Compralgyl is a combination pharmaceutical product comprising two agents that modulate nociceptive signaling through distinct pathways in the central nervous system (CNS).

Acetaminophen is thought to exert its effects primarily through the central inhibition of cyclooxygenase (COX) enzymes, particularly the COX-3 isoform. This enzymatic inhibition decreases the synthesis and release of prostaglandins (PGs) within the CNS. PGs are lipid compounds that act as local mediators to enhance afferent nociceptive signaling. Reducing PG synthesis centrally decreases the activity of these pro-nociceptive mediators.

Codeine acts as a pro-drug and is metabolized by the cytochrome P450 enzyme CYP2D6 into its active metabolite, morphine. Morphine is a mu-opioid receptor ( MOR) agonist. Agonist binding to MOR initiates G-protein-coupled intracellular signaling cascades that lead to the hyperpolarization of neurons and the decreased release of excitatory neurotransmitters from the pre-synaptic terminal. This cellular activity diminishes the transmission of nociceptive signals along the ascending pathway. The combination results in concurrent modulation of the chemical environment and the neuronal excitability of the CNS.

Dosage and Administration Information

Instruction Map: How to use Compralgyl (Acetaminophen,Codeine)


Administration Scope

Usage Parameter Instruction
Route of Administration The medicine is taken orally (by mouth).
Dosing Schedule (Adults) The standard dose is 1 to 2 dosage units (tablet, capsule, or measured liquid) repeated as needed. Doses are typically Acetaminophen 300 mg to 1000 mg combined with Codeine 15 mg to 60 mg per dose.
Timing in Relation to Meals Specific timing relative to meals is generally not a mandatory administration constraint for immediate-release oral forms.
Preparation Requirements Liquid forms (solutions or suspensions) must be accurately measured using a special marked measuring device; household spoons should not be used.
Age-Group Rules The combination product is contraindicated for all children younger than 12 years of age.
Missed-Dose Rules Since the drug is typically used on an as-needed (PRN) basis, if a dose is needed, the subsequent dose should be taken only after the minimum time interval (e.g., 4 to 6 hours) has passed since the last dose.
Special Procedural Conditions Do not take this medication with other products that contain acetaminophen (APAP) to prevent accidental excessive intake. The maximum total daily intake of Acetaminophen from all sources must not exceed 4000 mg in a 24-hour period.

Instruction Classifications (High-Level)

Classification Detail
Administration Method Type Oral (swallowing of solid or liquid form).
Frequency Pattern As-needed (PRN), typically every 4 to 6 hours.
Use-Context Constraints Restricted to short-term use for acute symptoms, strictly adhering to the maximum daily limits for both components.

Connection to the Overall Use Protocol

The instructions structure the use of this medicine as a controlled, intermittent therapeutic protocol administered via the oral route. The guidance mandates adherence to a strict minimum interval between doses and the maximum daily dose ceilings for both components to prevent intake that exceeds safety limits. These constraints, along with the specific age and population rules, define the standard administration approach for this combination.

Recent Clinical Evidence

Research evidence / Overview of studies for Compralgyl (Acetaminophen, Codeine)

The available research for the acetaminophen and codeine combination focuses on how this product was studied for short-term symptom relief. Clinical evaluation primarily uses high-standard study types, such as Randomized Controlled Trials (RCTs), where participants are randomly assigned to receive the medicine, a comparison drug, or an inactive substance (placebo).


Evidence for Use in Acute Pain (Moderate to Severe)

The combination was studied for acute pain—conditions involving periods of heightened symptoms, such as pain following minor surgical procedures like dental extractions, or discomfort related to acute musculoskeletal injuries. The study designs used were mainly short-term RCTs and the systematic reviews that analyze their data. These trials primarily examined outcomes related to physical discomfort, monitoring changes in pain intensity over time.

Studies suggest that the combination is generally studied in comparison to placebo and other active pain relievers. However, findings were mixed when evaluating the combination against some other active analgesics used for acute pain. The research observed short-term changes only, focusing on how symptoms evolved during the immediate hours after the product was studied.


Evidence for Use in Cancer Pain (Mild to Moderate)

The combination was evaluated in studies examining pain outcomes in adult patients with cancer pain, which is a condition where symptoms may vary in intensity. This research generally consists of a smaller number of RCTs and subsequent systematic reviews than those for acute pain. These studies examined changes in patient-reported outcomes related to perceived discomfort.


Duration of Observation and Long-Term Follow-up

Research exploring short-term symptom patterns typically involves follow-up durations that were limited to only a few hours or a few days. Evidence for the combination's use over extended time intervals is limited, and long-term effects are not fully established by the existing trial structure. The research base provides context for episodic use but offers limited information regarding its characteristics during prolonged or maintenance use.


Research Consistency and Areas of Uncertainty

Based on documents that summarize clinical reviews, the overall evidence quality varies across studies, and the level of certainty remains low for certain indications, such as long-term use. Key limitations described by researchers include that sample sizes were modest in some trials, follow-up durations were limited to acute phases, and comparative evidence is lacking against certain other therapeutic options, leading to findings that were mixed across various studies. Research contributes to the broader understanding of symptom patterns but does not determine whether an individual will respond similarly to the group patterns observed in the studies.

Key Studies & References

  1. Label: ACETAMINOPHEN AND CODEINE tablet (FDA Drug Labeling)
  2. Codeine-containing medicines: Harms and changes to patient access (TGA Consumer Fact Sheet)

Frequently Asked Questions (FAQ)

Common questions about Compralgyl (Acetaminophen,Codeine) (FAQ)


Q: What are the signs of liver damage associated with taking too much acetaminophen?

According to official product information, taking too much acetaminophen carries a risk of severe liver damage. Symptoms of liver problems are reported to include nausea, vomiting, loss of appetite, and extreme tiredness. Other signs noted are stomach pain, dark urine, and the yellowing of the eyes or skin (jaundice).


Q: Is breathing difficulty a recognized risk of using codeine-containing medicines?

Regulatory documents describe life-threatening respiratory depression (severely slowed breathing) as a primary serious risk of the codeine component. Signs of this condition can include slowed breathing, long pauses between breaths, or feeling shortness of breath. This effect is a serious risk noted in official safety information.


Q: What does it mean if someone is an 'ultra-rapid metabolizer' of codeine?

Official product labels describe an ultra-rapid metabolizer as a person whose genetics cause them to convert the medicine's codeine component into morphine more quickly and completely than typical. This rapid conversion can lead to higher-than-expected levels of morphine in the body. This genetic status is associated with an increased risk of severe effects like extreme sleepiness or shallow breathing, and the medicine is generally contraindicated in these individuals.


Q: Is the risk of physical dependence a possibility even when Compralgyl is taken as directed?

Regulatory information indicates that physical dependence may develop with the use of opioid medications. This state is defined by the body adapting to the continuous presence of the drug, which may result in withdrawal side effects if use is discontinued. This risk is noted, particularly with prolonged use.


Q: Are there documented severe skin reactions associated with the acetaminophen component?

The acetaminophen component is associated with a risk of severe, potentially fatal skin reactions. Official safety notes list specific conditions, including Acute Generalized Exanthematous Pustulosis (AGEP), Stevens-Johnson Syndrome (SJS), and Toxic Epidermal Necrolysis (TEN). These conditions involve serious skin damage.


Q: What are the symptoms of a serious allergic reaction to Compralgyl?

Regulatory documents report that signs of a serious allergic reaction can include a widespread rash, hives (urticaria), and generalized itching. More severe symptoms of hypersensitivity reported are swelling of the face, mouth, and throat, and the presence of respiratory distress.


Q: Is there a known risk of a condition called Serotonin Syndrome with this medication?

Official safety information indicates a risk of Serotonin Syndrome when this medicine is used alongside other serotonergic drugs. This condition involves the central nervous system and is characterized by symptoms such as hallucinations, seizures, an increased heart rate, and excessive sweating. Official safety information describes it as a serious reaction.


Q: What are the signs of adrenal gland problems linked to long-term opioid use?

Long-term use of opioid medications has been associated with a condition known as adrenal insufficiency. Regulatory documents note that symptoms of this condition may include loss of appetite, unusual tiredness, weakness, nausea, and vomiting. The condition is also associated with weight loss.


Q: Can Compralgyl be used to treat cough?

While the pure codeine component is sometimes indicated for use as an antitussive (cough suppressant), this specific combination product (Acetaminophen/Codeine) is primarily prescribed and regulated for the management of moderate to severe pain. The drug's primary approved purpose is focused on analgesia.


Q: How does the presence of codeine affect the risk of falling or dizziness?

The codeine component can cause central nervous system effects such as drowsiness, lightheadedness, and dizziness. Official information notes that activities such as driving or operating heavy machinery may be impacted by the sedating effects. These effects are associated with an increased risk of falling or accidental injury.


Q: Are there specific herbal supplements that are known to interact with codeine?

Regulatory resources specifically note that the herbal product St. John's wort and the supplement tryptophan may interact with codeine. These interactions are described as potentially affecting the medicine's metabolism, efficacy, or increasing the risk of certain side effects.


Q: What classes of antidepressants are known to interact with codeine?

Official documents describe interactions with classes of medicines that affect serotonin levels in the body, which can lead to Serotonin Syndrome. These classes include certain types of antidepressants such as Selective Serotonin Reuptake Inhibitors (SSRIs) and Serotonin and Norepinephrine Reuptake Inhibitors (SNRIs).


Q: Can patients with a history of seizures take Compralgyl?

Regulatory documents note that a history of seizures is a factor for consideration during medical evaluation. The medicine is generally used with caution in patients with a history of seizure disorders, as opioids are described as potentially increasing the risk of seizures.


Q: Is a history of substance abuse a factor in determining who can use Compralgyl?

Regulatory labels note that patient history related to substance abuse is considered when evaluating the risks associated with the codeine component. This evaluation includes a history of abuse of street or prescription drugs or alcohol addiction.


Q: Can Compralgyl cause a 'high' or euphoric feeling?

Official pharmacological documents describe codeine as an opioid that acts on the central nervous system. Opioid effects, which can include a feeling of euphoria or a 'high,' are known to occur due to the medicine's action as a mu-opioid receptor agonist.


Q: Is it possible for the medicine to stop working for pain over time (tolerance)?

Studies indicate that opioid use is associated with the development of tolerance. Tolerance is defined as a reduction in the pain-relieving effect following prolonged administration of the medicine. This is a recognized pattern that affects the medicine's potency over time.


Q: Does the codeine component of Compralgyl contain morphine?

Official pharmacological definitions classify codeine as a pro-drug, meaning it is not active in its initial form. The body must metabolize (convert) the codeine, primarily through the CYP2D6 enzyme, into morphine to achieve its primary pain-relieving effect. The final product itself does not contain morphine.


Q: How is Compralgyl regulated differently than over-the-counter pain medicines?

This combination product is classified by government authorities as a Controlled Substance (e.g., Schedule III or V), reflecting the potential for abuse and dependence associated with the codeine component. This regulatory classification results in the medicine requiring a prescription, unlike non-controlled, over-the-counter pain medicines.


Q: Why might the medicine cause nausea or vomiting in some patients?

Nausea and vomiting are listed as common side effects of the medicine, which can be caused by the codeine component's effects on the central nervous system. It is also noted that nausea and vomiting can be potential symptoms of acetaminophen overdose or developing liver damage, especially when maximum daily dose limits are exceeded.


Q: Does Compralgyl also reduce fever?

The acetaminophen component is a known antipyretic, meaning it has properties that reduce fever. While the fixed-dose combination product is primarily indicated for pain relief, the presence of acetaminophen contributes this secondary effect.


Q: How long does the pain relief from Compralgyl generally last? (Duration)

Regulatory guidance indicates the typical use interval is 4 to 6 hours. This interval is used in regulatory guidance and suggests the general expected duration of effect.


Q: How can Compralgyl use affect a baby who is being breastfed?

Official information contraindicates the medicine during breastfeeding due to the risk of serious harm to the breastfed baby from the transfer of codeine and its active metabolite, morphine, through breast milk. The medicine is generally not recommended for this population.


Q: Are older adults more susceptible to side effects like confusion from this medicine?

Official safety notes indicate that older adults may have a heightened sensitivity to the medicine's central nervous system effects. Symptoms such as confusion, respiratory depression, and profound sedation are noted to occur more frequently in the elderly population.


Q: What is the difference between Compralgyl and a non-opioid pain reliever like ibuprofen or naproxen?

Compralgyl is classified as an analgesic combination, pairing a non-opioid (Acetaminophen) with an opioid (Codeine). Non-opioid relievers like ibuprofen or naproxen are typically Non-Steroidal Anti-Inflammatory Drugs (NSAIDs). These NSAIDs work through different chemical pathways that primarily address pain and inflammation.


Q: What are the general instructions for taking Compralgyl in relation to food?

Official administration instructions indicate that specific timing relative to meals is generally not a mandatory administration constraint. The medicine can typically be taken without a strict requirement to consume it with or without food.


Q: What is the difference in effect between the acetaminophen part and the codeine part of the medicine?

The Acetaminophen component is described as working primarily to decrease pain-mediating chemicals (prostaglandins) in the central nervous system. The Codeine component, after being converted to its active metabolite morphine, works by binding to opioid receptors to diminish the transmission of pain signals in the spinal cord and brain.

How should Compralgyl (Acetaminophen,Codeine) be stored and disposed of?

Storage and Disposal Requirements

Official regulatory guidelines mandate specific conditions for storing and disposing of Acetaminophen and Codeine.

Storage Conditions

Requirement Details
Temperature Store at room temperature, protected from excessive heat and freezing.
Protection Keep the product protected from light and moisture.
Container Must be kept in the original, tightly closed container.
Child Safety Store the medicine securely, out of sight and reach of children, and inaccessible to others.

Disposal Instructions

Unused or expired medication must be disposed of promptly. Drug take-back programs or registered collection sites are the preferred method for disposal. If a take-back program is unavailable, the product can be discarded in the household trash after being mixed with an unpalatable substance and sealed in a container.

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

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