Zaldiar Efe

Quick links to important sections

Zaldiar Efe

Selected form

Treatment option: Pain

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 Zaldiar Efe

Property Description
Active ingredients Tramadol Hydrochloride, Acetaminophen (Paracetamol)
Form Film-coated tablet, Effervescent tablet
Pharmacological class Opioids in combination with Non-opioid Analgesics
General purpose Symptomatic relief of moderate to severe pain
Origin Synthetic

What Kind of Medicine is Zaldiar Efe?

Zaldiar Efe is a prescription-only medicine officially classified as a narcotic analgesic combination (Opioids in combination with Non-opioid Analgesics). This designation confirms its role as a powerful, multi-component drug intended for pain management. This combination product is indicated for the symptomatic treatment of pain, helping to ease discomfort when the fixed-dose pairing of its two active substances is deemed necessary.

The essential identity of this medicine lies in its classification as a combination analgesic, a formulation type clinically recognized for providing relief in cases where single-agent therapies are insufficient. Its general purpose is the efficient management of acute and persistent discomfort, representing a pharmaceutical strategy to address pain that is typically categorized as moderate to severe.

Composition and Synergistic Dual Action of Zaldiar Efe

The composition of Zaldiar Efe includes two principal active ingredients: Tramadol Hydrochloride and Acetaminophen, the latter commonly known as Paracetamol. Both compounds are synthetic in origin and are prepared for oral use in pharmaceutical preparations, such as a film-coated tablet or an effervescent tablet. The availability of an effervescent tablet (the 'Efe' distinction) offers patients an alternative to traditional solid oral forms.

This dual-agent formulation is specifically created to achieve a synergistic dual action, a key feature of its pharmacology. Tramadol Hydrochloride functions as a centrally-acting opioid agonist, modulating pain signals in the nervous system. Acetaminophen contributes a separate, additive non-opioid analgesic effect, providing a comprehensive approach to pain control through distinct physiological pathways. The combination of these two agents provides relief for specific types of pain by utilizing both pain relief mechanisms concurrently.

Regulatory References

  1. NIH MedlinePlus

What side effects are possible with Zaldiar Efe?

Possible Side Effects and Safety Information

The safety profile of Zaldiar Efe, a fixed combination of Tramadol and Acetaminophen, is governed by the adverse reactions documented in official regulatory labeling. These reactions are formally grouped by frequency and the body system affected, according to regulatory standards.

Classification Adverse Reaction System-Organ Class
Very Common (ge1/10) Nausea, Dizziness, Somnolence (Drowsiness) Gastrointestinal, Nervous System
Common (ge1/100 to <1/10) Vomiting, Constipation, Dry mouth, Headache, Confusion, Sweating, Pruritus (Itching) Gastrointestinal, Nervous System, Skin

Serious and clinically significant adverse reactions that are officially documented include Life-Threatening Respiratory Depression and the risk of Serotonin Syndrome, which is primarily associated with the Tramadol component. The Acetaminophen component carries a specific safety warning regarding Hepatotoxicity (Liver Damage), which is linked to dose thresholds.

Population-Specific Safety Considerations:

  • The product is Contraindicated in patients with severe hepatic impairment and in children younger than 12 years of age, or in adolescents under 18 following tonsillectomy/adenoidectomy.
  • Caution is noted for older adults (over 75 years) due to potential changes in drug elimination.

Time- and Exposure-Related Patterns:

Adverse reactions such as nausea and dizziness are more frequently observed at the start of treatment. The risks of drug dependence and withdrawal symptoms are officially associated with prolonged use and subsequent abrupt discontinuation.

Safety-Related Restrictions:

The medicine is contraindicated in conditions of acute intoxication with alcohol, hypnotics, opioids, or psychotropic drugs, and in cases of severe respiratory depression. This established regulatory framework defines the required safety limits for its use.

Overdose and Emergency Response

Overdose of this medicine, which contains both tramadol and paracetamol, presents as a severe, dual risk to life. The major risks involve both the central nervous system (CNS) and the liver.

Documented Overdose Symptoms

Symptoms are categorized by the primary substance affecting the physiological system:

  • Tramadol Component (Opioid-like): Manifestations include slow, unusual, or difficult breathing (respiratory depression/arrest), severe drowsiness, dizziness, unconsciousness, slow or weak heartbeat, and convulsions (fits). Serotonin syndrome, characterized by confusion, agitation, high body temperature, and uncoordinated muscle movements, has also been documented.
  • Paracetamol Component (Liver Toxicity): Initial symptoms are often non-specific and may include pallor, nausea, vomiting, anorexia, and abdominal pain. Critically, these early signs can be mild or absent, but the underlying toxicity can progress to severe liver damage, encephalopathy, coma, and death within 12 to 48 hours. Acute renal failure may also occur.

When to Seek Emergency Help

Immediate medical attention is required for all suspected overdoses, regardless of whether symptoms are present. The danger of liver failure from the paracetamol component necessitates rapid intervention, which is most effective within the first eight hours of ingestion.

Emergency Actions:

  • Immediately call for emergency medical services (e.g., call 911 or equivalent).
  • Contact a Poisons Information Centre or go to the nearest hospital Emergency Department right away.
  • Take the medicine packaging and any other medicines or alcohol consumed to assist medical staff.

Note on Risk: The risk of severe hepatic injury is increased in patients with conditions like non-cirrhotic alcoholic liver disease or other states of glutathione deficiency. Naloxone may be administered for severe opioid effects but may increase the risk of seizure.

Therapeutic Uses of Zaldiar Efe

What Zaldiar Efe Treats: Main Uses and Benefits

This medication is used to provide supportive symptomatic relief for pain that is classified as moderate to moderately severe. It is considered relevant in contexts where supportive symptom management is appropriate due to the pain intensity. It is applied across therapeutic domains involving distressing symptoms that interfere with daily functioning, such as pain following a medical procedure or conditions presenting with acute or episodic manifestations.

The medication is applied when short-term symptomatic assistance is needed and contributes to easing the overall symptom load when a high symptomatic burden is present. It is utilized for the management of moderate to moderately severe pain, short-term relief during acute episodes, and when symptoms are difficult to manage following initial symptomatic assistance.

It provides supportive relief when symptoms create noticeable physiological strain and may assist with sustaining functional comfort.


Focus: Management of Moderate to Severe Discomfort

Regulatory References

  1. Health Canada Product Monograph

Eligibility and Restrictions for Use

Eligibility Rules for Using Zaldiar Efe

The eligibility for Zaldiar Efe is strictly defined by regulatory documents, categorizing populations who are allowed, restricted, or absolutely prohibited from use.

Contraindicated Populations

Official labeling mandates that the medicine must not be used by several groups, including:

  • Children younger than 12 years of age.
  • Adolescents younger than 18 years following tonsillectomy and/or adenoidectomy.
  • Patients in a state of acute intoxication from alcohol or other centrally-acting psychotropic drugs.
  • Individuals currently taking Monoamine Oxidase Inhibitors (MAOIs) or within 14 days of cessation.
  • Patients with uncontrolled epilepsy, known gastrointestinal obstruction, or severe respiratory depression.

Restricted and Conditional Use

Use is not recommended or requires special regulatory consideration in specific physiological states:

  • Organ Function: Patients with severe renal impairment (CrCl < 30 mL/min) or severe hepatic impairment are generally advised against use.
  • Reproductive Status: Use is not recommended during both pregnancy (due to risk of Neonatal Opioid Withdrawal Syndrome) and breastfeeding (as active components pass into breast milk).
  • Older Adults: Patients over 75 years may require special consideration due to changes in elimination.

What should I know about interactions with other medicines?

Zaldiar Efe’s official interaction profile mandates adherence to specific co-administration constraints defined by regulatory authorities. The most significant interaction constraint is the contraindication with Monoamine Oxidase Inhibitors (MAOIs); official documents require a two-week separation period after MAOI discontinuation before initiating this therapy. Co-administration is also prohibited with alcohol and other products containing tramadol or acetaminophen.

The profile highlights severe pharmacodynamic risks. The concomitant use of this product with other Central Nervous System (CNS) depressants, including benzodiazepines, carries a documented risk of profound sedation, respiratory depression, coma, and death. Similarly, combining it with Serotonergic Drugs (e.g., SSRIs, triptans) or drugs that reduce the seizure threshold significantly increases the risk of seizures and Serotonin Syndrome.

Pharmacokinetic interference is documented via metabolic pathways. CYP3A4 inducers, such as Carbamazepine, are officially stated to compromise the efficacy of the tramadol component by reducing its plasma concentration. Conversely, CYP2D6 and CYP3A4 inhibitors may increase tramadol exposure. The absorption of the acetaminophen component may be reduced by Cholestyramine and increased by Metoclopramide or Domperidone. Furthermore, the interaction with Warfarin or other coumarin derivatives carries a documented risk of altered anticoagulant effect and bleeding. Caution is also advised regarding use in severe hepatic impairment, where the product is explicitly not recommended due to the acetaminophen component.

Mechanism of Action

Zaldiar Efe's activity relies on two distinct pharmacological mechanisms to influence neural and chemical pathways within the Central Nervous System ( CNS). The pharmacological domains involved operate through two separate, non-competitive biological systems.

Central Modulation of Nociceptive Signals

The Tramadol component engages two separate neuro-modulatory mechanisms. Primarily, its active metabolite ( M1) functions as an agonist of the mu-opioid receptor (mu OR), which stabilizes neuronal membranes via ion channel conductance, thereby influencing ascending signal pathways. Complementing this, the drug inhibits the neuronal reuptake of Norepinephrine and Serotonin , neurotransmitters critical to the body's descending pain inhibitory pathway. This combined action leads to inhibition of ascending signal propagation within the central pain pathways.

Non-Opioid Mediated Pathway Sensitization

The Acetaminophen component acts through a non-opioid domain focused on influencing pathway sensitivity. It is believed to inhibit Cyclooxygenase ( COX) enzymes selectively in the CNS, which decreases the synthesis of Prostaglandins ( PGs). Reduction of PG concentration modifies the excitability of nociceptive pathways and is involved in the physiological resetting of the hypothalamic temperature set-point.

Constraint: CYP2D6 Metabolic Dependence

The full physiological capacity of the mu OR agonism is constrained by the body's metabolism, as the active M1 metabolite is produced via the CYP2D6 enzyme. Genetic variability in this enzyme's activity can functionally limit the formation of M1, constraining the full potential of the mu OR-mediated agonism.

Dosage and Administration Information

Zaldiar Efe is administered through the oral route and is available as a fixed-dose combination tablet containing 37.5 mg of Tramadol Hydrochloride and 325 mg of Paracetamol. The administration technique depends on the specific form: film-coated tablets must be swallowed whole with liquid and must not be broken or chewed, while effervescent tablets must be dissolved in a glass of water. The medicine can be taken independently of meal times.

The standard adult regimen for patients 12 years and older begins with an initial dose of two tablets. Subsequent doses may be taken as needed, but the dosing interval must not be less than six hours. The total maximum daily dose is strictly limited to eight tablets (equivalent to 300 mg Tramadol and 2600 mg Paracetamol) to align with regulatory thresholds. Patients are directed not to use other products containing either Tramadol or Paracetamol concurrently to prevent inadvertently exceeding this maximum threshold.

Usage is governed by the principle that it should be administered for the shortest duration strictly necessary. If continuous, long-term use is required, official instructions mandate careful and regular medical monitoring, including treatment breaks where possible, to assess the necessity of continuation. Regarding specific populations, the medicine is not recommended for use in children under 12 years of age or in patients with severe renal or hepatic impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Based on an analysis of the available research evidence, this summary aims to clarify the medical evidence regarding the investigational drug [Drug Name] for the management of [Condition Name].


Phase 3 Clinical Trial Results — Main Efficacy Endpoints

Research has explored whether the treatment affects patient outcomes in adults diagnosed with [Condition Name] across several randomized, placebo-controlled trials. The primary endpoints in these trials focused on measurements of the [Specific Biomarker] and patient-reported scores on the [Validated Scale] at 12 weeks.

  • Symptom Severity: Studies investigated the potential for a change in reported pain and discomfort. Initial analysis of the 12-week data indicated that participants receiving [Drug Name] reported a mean difference of [X pm SD] points on the [Validated Scale] compared to [Y pm SD] points in the placebo group.
  • Biomarker Response: The studies implemented monitoring of blood pressure and measured the change in [Specific Biomarker] levels. The measurements reported for [Specific Biomarker] were [Value] in the treatment group versus [Value] in the control group.
  • Long-term Follow-up: A subset of participants was included in a 52-week extension study. Research explored whether measurements of symptom severity were maintained and evaluated the magnitude of any reported difference. Evidence remains limited on effects beyond one year.

Safety and Tolerability Profile

Early trials examined tolerability in adult patients participating in the studies. The trial data indicated that the most frequently reported adverse events (occurring in >5% of participants) were:

  • Headache
  • Nausea
  • Fatigue

The study protocols included comparison arms evaluating other treatments; however, participants were only enrolled if they had not responded to the current standard of care.


Important Limitations

The data summarized here comes from trials with an average duration of 12 weeks. Therefore, the long-term effects of [Drug Name] are not yet fully established. The application of this research evidence to individual health circumstances is a matter for professional clinical assessment.

Frequently Asked Questions (FAQ)

Common questions about Zaldiar Efe (FAQ)

Q: Is Zaldiar Efe considered an opioid painkiller?

A: Zaldiar Efe is officially classified as a narcotic analgesic combination medicine. This is because one of its active components, Tramadol, is an opioid analgesic that acts on pain receptors in the central nervous system. The combination formulation utilizes both the opioid and non-opioid mechanisms as part of its activity profile.


Q: What is the purpose of the 'Efe' designation in the name?

A: The 'Efe' distinction is used in the product name to indicate the effervescent tablet formulation of the medicine. This specific form provides an alternative to the standard film-coated tablets, as it is designed to be dissolved in water before taking.


Q: How quickly does Zaldiar Efe start to work?

A: Official pharmacokinetic studies provide information on how quickly the active substances are absorbed. Paracetamol reaches its peak concentration in the blood in about 0.9 hours, while Tramadol reaches its peak in about 1.8 hours. These measurements reflect the time it takes for the ingredients to be at their highest level, which is generally considered to reflect the time of maximum absorption.


Q: How long does the effect of Zaldiar Efe typically last?

A: Official dosing instructions require that the time between doses must not be less than six hours. This mandatory interval is set based on the substance's elimination rate, which is tracked via half-life measurements.


Q: Is Zaldiar Efe known to cause withdrawal symptoms?

A: Official regulatory labeling states that tolerance, psychic and physical dependence may develop, particularly after extended or long-term use. To help manage this risk, official guidance advises that the dose is typically reduced gradually to help manage the risk of withdrawal symptoms.


Q: Is Zaldiar Efe generally suitable for breastfeeding mothers?

A: Use is not recommended during breastfeeding because the active components of the drug pass into breast milk. Tramadol, one of the components, is specifically contraindicated if continuous treatment (more than 2 to 3 days) is necessary.


Q: Does Zaldiar Efe affect fertility?

A: Official data on the effects of the Tramadol component suggest that it is not expected to influence male or female fertility in humans. Information specifically concerning the combination product's influence on human fertility is not available in the regulatory documentation.


Q: Is Zaldiar Efe known to interact with warfarin or other blood thinners?

A: Yes, official documents advise caution regarding interactions with warfarin and other coumarin derivatives (a class of blood thinners). This combination carries a documented risk of altered anticoagulant effect, which may lead to bleeding.


Q: Can Zaldiar Efe be taken long-term?

A: Regulatory documents state the medicine should under no circumstances be administered for longer than is strictly necessary. Official guidance emphasizes the need for careful and regular medical monitoring to continually assess whether the continuation of treatment is necessary.


Q: Is Zaldiar Efe the same as regular Zaldiar?

A: The name 'Zaldiar Efe' specifically designates the effervescent tablet formulation. While this form and the standard film-coated 'Zaldiar' form typically contain the exact same quantity of active ingredients, the 'Efe' distinction refers to the different method of preparation and administration.


Q: Can Zaldiar Efe affect my ability to drive?

A: Official warnings state that the medication may induce central nervous system effects such as drowsiness or dizziness. For this reason, official warnings indicate that patients should avoid driving or operating machinery if they experience changes in their alertness or concentration.


Q: Does Zaldiar Efe have any known effects on the liver or kidneys?

A: The medicine is contraindicated in patients with severe hepatic impairment (severe liver problems) because of the Paracetamol component. For patients with renal insufficiency (kidney problems), regulatory information indicates that the body's elimination of both active substances may be delayed or prolonged.


Q: What should I do if I experience nausea with Zaldiar Efe?

A: Nausea is documented in official labeling as a very common adverse reaction, which is frequently observed more often when treatment is first started. If the nausea is persistent, unusually severe, or causes significant discomfort, regulatory guidance recommends consulting a healthcare professional.


Q: Does taking Zaldiar Efe affect my blood pressure?

A: Official documents generally describe the cardiovascular effects of the Tramadol component as slight. However, a drop in blood pressure and fainting have been documented in association with a rare, serious allergic reaction.


Q: Is there a risk of dependency with Zaldiar Efe?

A: Yes, regulatory documents clearly state that tolerance, psychic and physical dependence may develop, especially with repeated, long-term use. For patients with a history of drug abuse or dependence, regulatory warnings advise that treatment should be managed for short periods under close supervision.


Q: Can people with a history of seizures take Zaldiar Efe?

A: The medication is formally contraindicated in patients with epilepsy that is not adequately controlled by treatment. Furthermore, official warnings advise caution for patients with any known risk factors for seizures, including those with a history of seizures.


Q: Are there specific food or drink restrictions while using Zaldiar Efe?

A: The use of this medicine is prohibited with alcohol due to the increased risk of certain adverse effects. Aside from this prohibition, regulatory information indicates that the medication can be taken independently of meal times, suggesting there are no specific food restrictions.


Q: Does the package insert for Zaldiar Efe list precautions for heart conditions?

A: Official documentation describes the general cardiovascular effects of the Tramadol component as generally slight. The package insert does not typically contain a specific, dedicated section listing precautions for common heart conditions beyond this general safety profile.


Q: Is Zaldiar Efe considered a controlled substance in some regions?

A: Yes, due to the presence of Tramadol, the drug is designated as a controlled substance in many countries, such as a Schedule IV substance in the United States. This classification is assigned by national drug authorities and reflects the potential for abuse and dependency, leading to strict regulatory requirements.

How should Zaldiar Efe be stored and disposed of?

Storage Requirements

Official regulatory documents require that Zaldiar Efe tablets be stored below 25°C and protected from environmental factors that could compromise stability. The medication must be kept in a cool, dry place, and should not be stored in the bathroom, near a sink, or left in a car or on window sills, which are locations subject to excessive heat and dampness. It is mandatory to keep the tablets in their original packaging (blister pack and carton box) until the moment they are taken.

Child Safety and Disposal

For child safety, the medication must be stored in a location where children cannot reach it. Storage in a locked cupboard at least one-and-a-half metres above the ground is often recommended for potent medicines. Unused, expired, or damaged Zaldiar Efe tablets must not be disposed of in household waste or flushed down the toilet. Instead, they must be returned to a pharmacist for formal, controlled disposal.

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

Available in countries:

Equivalent of Zaldiar Efe found in:

A-Z Index: