Compralgyl

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Compralgyl

Medically reviewed

Laura Arias

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

Compralgyl is a type of combination medicine primarily used for pain relief, whose identity and composition are well-established in global healthcare systems.

Property Description
Active Ingredients Paracetamol (Acetaminophen) & Codeine
Form Oral Tablet (often scored)
Pharmacological Class Combination Analgesic (Anilide & Opioid)
Common General Purpose Relief of moderate to moderately severe pain
Origin Synthetic/Derived

What Type of Medicine Is Compralgyl?

Compralgyl is classified as a combination analgesic, a single oral medicine that unites two different pain-relieving substances—Paracetamol and Codeine—to achieve a stronger effect than either substance alone. It belongs to the high-level pharmacological class of analgesics, combining an Anilide Analgesic (Paracetamol) with an Opioid Analgesic (Codeine). The inclusion of Codeine means this medicine is clinically recognized for use in situations where common non-opioid pain relievers are insufficient. The approach of combining a non-opioid and an opioid is widely supported by consensus for managing pain that requires stronger intervention.


What Is Compralgyl Made Of and What Form Does It Take?

This medicine is composed of the active ingredients Paracetamol and Codeine (often as Codeine Phosphate), which are mixed with solid vehicles to form an Oral Tablet. Both active ingredients are synthetic or derived substances. The tablet is intended for the oral route of administration, allowing the agents to be absorbed systematically throughout the body. The specific active ingredients are recognized for their utility in pain management.


What Is the General Purpose of Compralgyl?

The general purpose of Compralgyl is to offer effective relief for discomfort that is moderate to moderately severe. The dual action aims to make pain feel less intense while also dampening the signals that carry the pain. The Paracetamol component also provides the secondary benefit of helping to reduce elevated body temperature when a fever accompanies the pain. It is positioned as a reliable, stronger option for managing pain.

Regulatory References

  1. NIH MedlinePlus Drug Information

What side effects are possible with Compralgyl?

Possible Side Effects and Safety Information

The safety profile for Compralgyl, a combination of Paracetamol and Codeine, is derived from official regulatory classifications and is structured around effects related to both active components. Adverse reactions are grouped by how frequently they are reported and which System-Organ Classes are affected, consistent with official regulatory documentation.

Frequency-Classified Adverse Reactions

The most Common adverse reactions typically relate to the central nervous system and the gastrointestinal system, and include drowsiness, dizziness, lightheadedness, nausea, vomiting, and constipation. Other reactions, such as hypersensitivity (e.g., rash) or respiratory depression, are classified as less common or Rare.


Serious Adverse Reactions and Safety Constraints

Official regulatory documents emphasize specific serious risks. The Codeine component carries a risk of Life-Threatening Respiratory Depression, particularly when treatment is initiated or the dose is increased. It also carries the risk of Addiction, Abuse, and Misuse. The Paracetamol component is associated with a risk of Hepatotoxicity (severe liver damage), often resulting from exceeding the maximum daily dose. Severe allergic reactions are also listed as a possibility.


Population-Specific Safety Notes

The medicine is contraindicated in children younger than 12 years of age, and its use is not recommended for lactating patients due to the potential for serious adverse reactions in the infant. Older adults and individuals with pre-existing hepatic impairment require careful consideration as they may be more susceptible to serious adverse effects.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Compralgyl overdose is structured around the dual toxic effects of its active components.

Documented Manifestations and Severe Outcomes

Overdose may initially present with non-specific signs such as nausea, vomiting, abdominal pain, pallor, and malaise. The opioid component can cause Central Nervous System (CNS) depression, drowsiness (somnolence), and small pupils (miosis). The severe, life-threatening outcomes are dual: respiratory depression and circulatory failure from the opioid, and delayed, lethal hepatic necrosis (liver failure) from the Paracetamol component. Specific populations, including individuals with chronic alcohol consumption or pre-existing hepatic impairment, face an increased risk of severe liver damage. Accidental ingestion, especially by a child, is recognized as a fatal overdose risk due to the opioid content.

Required Emergency Actions

Seek immediate medical attention by calling emergency services or a Poison Control Center for any suspected overdose, even if no symptoms are apparent. Official guidance mandates urgent medical evaluation and hospital monitoring due to the potential for delayed, serious organ damage. Management requires the administration of specific regulatory antidotes: N-acetylcysteine (NAC) to counteract Paracetamol toxicity and Naloxone to reverse opioid effects, alongside supportive procedural treatments.

Therapeutic Uses of Compralgyl

What Compralgyl Treats: Main Uses and Benefits

The primary therapeutic role of Compralgyl is to provide additional symptomatic support in situations where discomfort is noticeable and persistent, focusing strictly on pain relief and fever reduction. The combination is considered relevant for managing acute moderate pain in situations where other analgesics alone may not provide sufficient relief.


Key Areas of Symptom Management

This combination analgesic is specifically applied in contexts where the intensity of symptoms related to physical discomfort—such as significant headache, heightened menstrual cramping (dysmenorrhea), or pronounced dental pain—is classified as moderate to moderately severe. It is commonly used across conditions presenting with acute episodes, including postoperative discomfort following minor procedures and aches related to systemic illness like colds or flu. It helps address symptom clusters that may become intense or disruptive.

“This medication is applied across domains where additional symptomatic support is needed, assisting with the temporary strain caused by acute episodes.”

This combination offers symptomatic relief that is often needed when standard non-opioid medications are insufficient, providing support that helps ease the overall symptom burden and may assist with maintaining functional stability during periods of acute recovery.


Quick Fact: Relief for Moderate Pain and Fever The medicine is relevant for easing symptoms related to physical discomfort when symptoms related to pain and elevated body temperature create noticeable physiological strain.

Eligibility and Restrictions for Use

Eligibility Profile: Who Can and Cannot Use Compralgyl

Official regulatory guidelines establish clear limitations for the use of Compralgyl (a paracetamol and codeine combination product), based on age, patient condition, and physiological status.


Populations for Whom Use is Contraindicated

  • Pediatric Patients: Use is strictly prohibited in all children younger than 12 years of age.
  • Post-Operative Status: The medicine is contraindicated for adolescents younger than 18 years of age who have undergone surgery for the removal of tonsils and/or adenoids for Obstructive Sleep Apnea (OSA).
  • Breastfeeding Mothers: Use is contraindicated in women who are breastfeeding due to the risk of serious adverse reactions in the infant.
  • Hypersensitivity: Individuals with a known allergy or idiosyncratic reaction to paracetamol, codeine, other opioid analgesics, or any of the product's excipients must not use it.
  • Clinical Conditions: Patients with severe hepatic (liver) insufficiency, acute respiratory depression, significant bronchial asthma, or a known/suspected gastrointestinal obstruction, including paralytic ileus, are excluded.

Use is Restricted or Not Recommended

  • Adolescents (12-18 years): Use is not recommended for those with conditions that may increase the risk of serious breathing problems, such as severe lung disease, sleep apnea, or obesity.
  • Impaired Function: Use requires caution and potential dose adjustment for patients with impaired kidney or liver function.

What should I know about interactions with other medicines?

The official regulatory interaction profile for Compralgyl, a combination of Paracetamol and Codeine, is structured around the two active components, leading to specific pharmacokinetic and pharmacodynamic constraints.

Pharmacodynamic and Contraindicated Interactions

  • Monoamine Oxidase Inhibitors (MAOIs) are formally contraindicated for co-administration with the Codeine component.
  • The concurrent use of CNS Depressants (e.g., sedatives, anxiolytics, hypnotics) and Alcohol requires caution due to the documented risk of additive CNS depression.
  • The Paracetamol component may potentiate the effects of Coumarin Anticoagulants (e.g., Warfarin) with prolonged, high-dose use, which is noted in regulatory documents.

Metabolic and Absorption Interactions

  • CYP2D6 Inhibitors (e.g., Quinidine, Fluoxetine, Bupropion) are documented to reduce the formation of Morphine (Codeine's active metabolite), thereby altering the intended analgesic effect.
  • Probenecid is known to increase the plasma concentration of Paracetamol by inhibiting its clearance. Conversely, Colestyramine reduces Paracetamol absorption and requires a mandatory administration separation of at least one hour.
  • Metoclopramide and Domperidone are substances documented to accelerate the absorption rate (Cmax) of Paracetamol.

Population-Specific Interaction Notes

  • Interactions are potentially intensified in individuals classified as CYP2D6 Ultra-Rapid Metabolizers due to enhanced Codeine conversion. This risk is specifically highlighted in regulatory data.

Mechanism of Action

Compralgyl is a combination pharmaceutical product containing paracetamol (acetaminophen) and codeine. The mechanistic action is a synergistic effect of two distinct pharmacodynamics.

Paracetamol is centrally active, exerting its primary influence within the central nervous system (CNS). Its molecular target is believed to involve the inhibition of cyclooxygenase-2 (COX-2), particularly within the CNS environment where low levels of arachidonic acid and peroxides prevail. This interaction reduces the synthesis of prostaglandins (PGs) in the hypothalamus and spinal cord, modulating a key signaling cascade. Additionally, paracetamol is an indirect agonist of the cannabinoid CB1 receptor pathway, mediated by its metabolite N-(4-hydroxyphenyl)arachidonylamide (AM404), which inhibits the reuptake of the endogenous cannabinoid anandamide, leading to enhanced CB1 receptor signaling.

Codeine, a prodrug, is metabolically converted to morphine primarily by the cytochrome P450 isoenzyme CYP2D6 in the liver. Morphine, the active metabolite, functions as an agonist at the mu-opioid receptors (mu-OR), which are distributed throughout the CNS, including the brainstem and dorsal horn of the spinal cord. mu-OR activation couples to G-proteins, initiating an intracellular cascade that results in the inhibition of adenylate cyclase, reduced intracellular cyclic AMP (cAMP) levels, and the hyperpolarization of neurons via the opening of G-protein-coupled inwardly-rectifying potassium channels ( K IR3). This molecular action decreases neuronal excitability and the subsequent release of excitatory neurotransmitters, thereby modulating afferent signal transmission at the system level.

Dosage and Administration Information

Instruction Map: How to use Compralgyl — Official Administration Guidelines

This map summarizes the instructions for administering the Paracetamol and Codeine combination.

Administration Scope

Field Instruction
Route of administration Oral ingestion of the tablet or capsule dosage form.
Dosing schedule 1 to 2 dosage units of the approved strength, based on the lowest effective dosage for the patient.
Timing in relation to meals May typically be taken with or without food.
Age-group administration rules Use is restricted to patients above 12 years of age for acute moderate pain.
Missed-dose rules If a dose is missed, it should only be taken if the minimum interval of 4 hours since the last dose has elapsed.
Special procedural conditions The total daily dose of Paracetamol must not exceed 4000 mg. Abrupt cessation must be avoided in physically dependent patients; the dose should be tapered gradually.

Instruction Classifications (High-Level)

Field Classification
Administration method type Oral.
Frequency pattern As-needed (PRN), with a minimum interval of 4 hours between doses.
Clinical basis Established prescribing information for Codeine-containing analgesics.
Use-context constraints Must be used only for acute pain and for the shortest duration of time possible.

Resulting Procedural Structure

Official Step Sequence:

  • Determine the starting dose (1 or 2 units) based on the lowest effective dosage for the individual patient.
  • Administer the dose orally, as needed for the acute pain episode.
  • Wait a minimum of 4 hours before administering any subsequent dose.

Connection to the overall use protocol:

Standard guidelines establish a protocol for Compralgyl centered on minimizing exposure and individualizing the regimen. This involves a non-scheduled, oral dosing pattern with a mandatory 4-hour minimum interval and clear upper boundaries on the daily intake of both active components. This structured protocol is intended for the management of acute, short-lived pain and requires adherence to a gradual tapering schedule when discontinuing the medicine after prolonged use.

Recent Clinical Evidence

Research evidence / Overview of Studies for Compralgyl


Evidence for use in Acute Moderate to Moderately Severe Pain

The research base for the Paracetamol/Codeine combination is primarily built upon Systematic Reviews and collections of Randomized Controlled Trials (RCTs). These studies were used in research exploring how symptoms change over time in Adults experiencing pain that was noticeable and persistent. Researchers examined patient-reported outcomes describing perceived discomfort and the overall level of physical discomfort for the assessment of pain relief.

Studies monitored data related to Pain Intensity Reduction using validated assessment tools. Findings describe measurements when the combination was studied alongside a control substance or Paracetamol taken alone. Metrics related to the Time to Administration of Rescue Analgesics were recorded, with reported measurements focusing on the first few hours following a single administration.

Evidence for use in Acute Postoperative Pain

Compralgyl was also evaluated in research contexts involving acute or disruptive episodes, specifically after minor surgical procedures such as dental extractions. In these specific research scenarios, studies monitored changes measured during the study period. Trial outcomes described patient-reported experiences related to Pain Relief Scores and how symptoms evolved in the observed populations during the initial recovery phase.

Research Gaps and Uncertainty

The evidence is heavily concentrated on single-dose administration, meaning that long-term outcomes are not fully established. The research does not provide extensive data on the durability of short-term findings. Furthermore, evidence is limited regarding the incremental effect and analgesic measurement of very low-dose Codeine combinations. Data for certain groups, such as the older adult population, remain insufficient; therefore, the results apply only to the populations studied in the controlled trials.

Key Studies & References Acetaminophen and Codeine Drug Information (NIH/MedlinePlus)

Frequently Asked Questions (FAQ)

Common questions about Compralgyl (FAQ)


Q: How long does it take for Compralgyl to start working?

According to official product information, the Paracetamol component generally begins acting sooner, reaching its peak concentration in the bloodstream within 30 minutes to 2 hours. The Codeine component, which must first be metabolically converted into its active form, typically reaches its peak effect around 1 hour after administration. This dual action is based on the combination of two different pain-relief mechanisms.


Q: What is the difference between Compralgyl and just taking regular paracetamol?

Compralgyl is a combination medicine containing both Paracetamol and the opioid analgesic Codeine. It is typically indicated for pain relief in situations where common non-opioid pain relievers, such as Paracetamol alone, have not been sufficient. Due to the Codeine component, the combination is associated with additional risks that are detailed in the official product information.


Q: What should I do if I accidentally take more than the recommended dose?

If more than the recommended dose is taken, it is important to seek immediate emergency medical attention or contact a Poison Control Center right away. Taking an overdose can cause severe and potentially fatal liver damage (Hepatotoxicity) from the Paracetamol component. It also significantly increases the risk of serious side effects from the Codeine component, such as life-threatening respiratory depression.


Q: Can I drink alcohol while taking this medication?

Official regulatory warnings state that alcohol should be avoided while taking this medication. Alcohol is classified as a Central Nervous System (CNS) depressant, and combining it with Compralgyl can result in profound sedation, severe respiratory depression, coma, and death, as documented in the product safety profile.


Q: Will Compralgyl make me sleepy, and can I drive after taking it?

Official safety information indicates that common side effects can include drowsiness, dizziness, and lightheadedness. Because of the risk of these effects, regulatory documents suggest that individuals should avoid driving or operating heavy machinery until they know how the medicine affects them.


Q: What should I do if I forget to take my dose?

If a dose is missed, the official administration guidelines state that the dose should only be taken if the minimum time interval since the last dose has passed—typically 4 hours. The instruction is to not take a double dose to compensate for a missed dose.


Q: How do I safely stop taking Compralgyl?

To manage the potential for withdrawal symptoms after prolonged use, the official product information recommends that the dose be tapered gradually. A healthcare provider can establish a specific plan for safely reducing the dosage over time.


Q: Which medicines should I absolutely avoid taking with Compralgyl?

Official regulatory warnings identify certain medicines that must be avoided due to the risk of serious adverse reactions. This includes Monoamine Oxidase Inhibitors (MAOIs). Caution is also advised regarding combining it with other CNS Depressants (such as sedatives) and certain medications classified as CYP2D6 inhibitors.


Q: Can Compralgyl cause liver damage?

Yes. The Paracetamol component carries a serious safety risk of Hepatotoxicity, which is severe liver damage that may be fatal. This risk is primarily associated with exceeding the maximum daily dose, using other Paracetamol-containing products, or consuming alcohol while using the medicine, according to regulatory documents.

How should Compralgyl be stored and disposed of?

Storage and Disposal Information

Official regulatory guidance mandates specific conditions for storing and disposing of medicines like Compralgyl to maintain product integrity and ensure safety. These requirements are based on general pharmaceutical handling rules when drug-specific instructions are not available.

Storage Requirements

Medicines should be stored at room temperature in a cool, dry place, away from excessive heat and humidity. The product must be kept in its original container with the lid tightly closed to protect it from light and moisture. For safety, it must be stored up and away and out of the sight and reach of children and pets to prevent accidental ingestion.

Disposal Instructions

Unused or expired medicine should ideally be disposed of using a DEA-registered drug take-back program or mail-back envelope. If no take-back option is available, the drug must be mixed with an undesirable substance (such as dirt or cat litter) and placed in a sealed container before being disposed of in household trash. Personal information must be removed from all packaging before disposal.

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

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