Dolonat

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Dolonat

Treatment option: Pain

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 Dolonat

Quick Facts

Property Description
Active ingredients Acetaminophen (Paracetamol), Tramadol Hydrochloride
Form Oral tablet (Fixed-dose combination)
Pharmacological class Combination Analgesic (Non-opioid and Opioid)
Common use Relief of pain requiring a dual-mechanism approach
Origin / Status Synthetic / Prescription-only medicine (Rx)

Defining Dolonat: Combination Analgesic and Class

Dolonat is a synthetic, prescription-only medicine that is classified as a fixed-dose combination (FDC) analgesic. This product, manufactured by Pfizer Ltd., is structurally designed for pain management that requires more than a single agent. The FDC approach, which combines two distinct active ingredients, is a globally recognized strategy in pharmacology. It falls under the general pharmacological classification of a combined therapy, comprising both a non-opioid analgesic agent and a centrally acting opioid agent within a single oral tablet. This dual-action design positions Dolonat as an enhanced option compared to single-agent pain relievers.

Active Ingredients and Pharmaceutical Form

The medicine is composed of two primary active ingredients: Acetaminophen (Paracetamol) and Tramadol Hydrochloride (Tramadol). Acetaminophen is a well-established non-opioid pain reliever, while Tramadol functions as a synthetic opioid analgesic. The combined oral formulation is intended to provide a synergistic effect. The Tramadol/Acetaminophen combination is recognized as a reliable pharmacological option for various types of pain. This means the medicine is clinically recognized for its ability to address complex or moderate-to-severe pain, such as that associated with recovery or chronic conditions.

General Purpose: Synergistic Pain Relief

The primary utility of Dolonat is to achieve enhanced relief through the synergistic effect of its two components. This fixed-ratio approach is intended to produce a therapeutic effect greater than the simple addition of their individual contributions. The dual-mechanism allows the non-opioid agent and the opioid component to target pain through complementary physiological actions, simultaneously addressing pain at both central and peripheral levels. This combined strategy is designed to provide a more effective and comprehensive solution for symptoms when simpler, single-ingredient treatments prove insufficient.

What side effects are possible with Dolonat?

Adverse Reaction Scope

Category Regulatory Safety Information
Frequency classification The most common adverse reactions reported in clinical trials, with an incidence often greater than or equal to 15%, include nausea, constipation, dizziness/vertigo, somnolence (sleepiness), vomiting, and pruritus (itching).
System-organ classes involved Common adverse events are primarily categorized within Gastrointestinal Disorders (e.g., nausea, constipation) and Nervous System Disorders (e.g., dizziness, somnolence).
Serious adverse reactions Officially documented critical risks include Life-Threatening Respiratory Depression, Acute Liver Failure (Hepatotoxicity) linked to the acetaminophen component, Serotonin Syndrome, and elevated Seizure Risk.
Population-specific safety considerations The medicine is not recommended for children younger than 12 years of age. Older adults and debilitated patients are considered at increased risk for life-threatening respiratory depression. Prolonged use during pregnancy can result in Neonatal Opioid Withdrawal Syndrome.
Dose- or exposure-related patterns The risk of respiratory depression is officially stated as greatest during the initiation of therapy or following a dosage increase. Neonatal Opioid Withdrawal Syndrome is associated with prolonged use.
Safety-related restrictions or limitations The label notes the risks of Addiction, Abuse, and Misuse, Physical Dependence, Withdrawal Symptoms upon cessation, and potential for Severe Hypotension.

Safety Classifications (High-Level)

Category Regulatory Safety Information
Regulatory basis Safety data and official classifications of risks are founded upon the Prescribing Information mandated by government health authorities (e.g., FDA/NIH DailyMed).
Context-of-use safety notes Specific warnings are included against concomitant use with CNS depressants, such as benzodiazepines, which may lead to profound sedation and respiratory depression.

Resulting safety structure

  • The official safety profile distinguishes between expected, high-frequency side effects and rare, yet critical, serious adverse reactions.
  • Safety constraints are explicitly defined for vulnerable patient populations, including pediatric patients and those with hepatic or renal impairment.
  • Risks inherent to opioid components, such as addiction and physical dependence, are formally stated as administration-agnostic safety limitations.

Connection to the overall safety profile

The official regulatory documentation establishes a comprehensive risk framework by categorizing side effects by frequency and system involvement, while mandating critical warnings for serious adverse reactions. This structure formally communicates the acknowledged potential for respiratory depression, hepatotoxicity, and dependence, defining the medicine’s overall safety context according to government standards.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose involving the Tramadol and Acetaminophen combination is officially documented as a severe event with the potential for life-threatening outcomes from both components. Immediate medical attention must be sought if an overdose is suspected, even if the individual initially appears well, due to the risk of delayed symptoms.

Manifestations of Tramadol toxicity include acute central nervous system depression, potentially leading to respiratory depression (including respiratory arrest), somnolence, stupor, or coma. Other severe neurological effects documented include seizures and cardiovascular collapse.

Critically, the Acetaminophen component carries the documented risk of acute liver failure (hepatic necrosis). Clinical evidence of liver damage may not be apparent until 48 to 72 hours following ingestion. Furthermore, accidental ingestion of even one dose poses a fatal overdose risk in children.

Management requires specialized care and component-specific interventions. N-acetylcysteine (NAC) is used to protect against acetaminophen-induced liver damage, while naloxone may be administered to reverse tramadol-induced respiratory depression, noting the associated risk of increased seizure activity. Supportive care includes maintaining respiratory function and controlling convulsions with documented agents like diazepam. Haemodialysis is officially documented as not suitable for tramadol detoxification.

Therapeutic Uses of Dolonat

What Dolonat Treats: Main Uses and Benefits

The primary role of Dolonat is to provide a comprehensive, dual-action approach for managing acute pain severe enough to require an opioid analgesic, especially when single-ingredient non-opioid medications do not offer adequate relief. The medication is used to address pronounced symptoms and contributes to improved patient comfort.

The medication is commonly used to help manage the intensity of pronounced symptoms related to physical discomfort that is difficult to tolerate, contributing to easing the symptom load. It is considered relevant for situations involving acute symptomatic episodes, such as pain following surgical procedures or significant traumatic injuries, and for managing symptoms associated with chronic conditions like osteoarthritis and chronic low back pain.

“This combination analgesic may be part of symptomatic management in situations where patients experience discomfort that significantly interferes with daily functioning.”

The formulation offers symptomatic relief that helps patients cope more steadily with difficult, intense episodes, providing support that eases the overall symptom burden.


Quick Fact: Relief for Moderate to Severe Pain
Target Symptom Severity: Moderate-to-severe pain refractory to non-opioids.
Core Use Contexts: Acute post-event recovery and chronic symptom management.
Patient Benefit: Contributes to improved comfort and may assist with maintaining functional stability.

Regulatory References

  1. NIH DailyMed Overview

Eligibility and Restrictions for Use

Who can and cannot use Dolonat? — Official Regulatory Information

Dolonat (Tramadol/Acetaminophen FDC) is officially established for use only in adults for short-term management of acute pain. Regulatory documents define clear population-based rules for eligibility and absolute prohibition.

Contraindicated Populations (Must Not Use) Conditional Eligibility (Restricted Use)
Children under 12 years of age. Severe Renal Impairment: Use is restricted and requires a prolonged interval.
Children under 18 years post-tonsillectomy/adenoidectomy. Severe Hepatic Impairment: Use is generally not recommended.
Patients with significant respiratory depression or acute/severe asthma. Older Adults (Over 75 yrs): Use with caution; interval adjustment is required.
Patients using MAOIs (Monoamine Oxidase Inhibitors) or within 14 days. Comorbidities: Use with caution in patients with a history of seizures or substance abuse.

Pregnancy and Lactation Eligibility Status:

  • Pregnancy: Use is generally not recommended; prolonged use carries a risk of Neonatal Opioid Withdrawal Syndrome (NOWS).
  • Lactation: Breastfeeding is not recommended due to the risk of serious adverse reactions in the infant.

Connection to the overall eligibility profile

Official labeling strictly restricts use to the approved adult population by imposing absolute contraindications on specific age groups and respiratory-compromised patients. Eligibility is further limited by required cautions and avoidance in cases of organ dysfunction or specific neurological and psychiatric comorbidities.

What should I know about interactions with other medicines?

The official regulatory profile for this combination analgesic (Acetaminophen/Tramadol) lists specific substance interactions that impose mandatory prohibitions and strict restrictions on co-administration.

Formal Interaction Prohibitions

Co-administration is contraindicated with Monoamine Oxidase Inhibitors (MAOIs), requiring a mandatory 14-day delay after stopping the MAOI before initiation. The product is also contraindicated with other Tramadol- or Acetaminophen-containing products to avoid inadvertent overdose [Source 2.5].

Documented Interaction Categories

Category Interacting Substances and Official Effect
Pharmacodynamic Risk CNS Depressants (including alcohol and Benzodiazepines) carry a documented increased risk of profound sedation and respiratory depression [Source 1.5]. Serotonergic Drugs (e.g., SSRIs, SNRIs) increase the risk of Serotonin Syndrome [Source 2.3].
Pharmacokinetic Risk CYP2D6 Inhibitors (e.g., Fluoxetine) may increase Tramadol exposure while decreasing the active metabolite (M1) [Source 1.3]. CYP3A4 Inducers (e.g., Carbamazepine, St. John's wort) may reduce Tramadol/M1 concentrations [Source 1.3].
Absorption Modifiers Cholestyramine may reduce Acetaminophen absorption, while Metoclopramide may increase its absorption speed [Source 2.6]. Co-administration with Warfarin-like anticoagulants has been associated with reports of increased International Normalized Ratio (INR) [Source 1.1].

Population-Specific Notes: The product is not recommended in patients with severe hepatic or renal impairment [Source 3.2]. Individuals identified as Ultra-Rapid CYP2D6 Metabolizers are at increased risk for life-threatening respiratory depression [Source 2.2]. The regulatory documents structure these interactions to guide appropriate management concerning metabolic and additive effects.

Mechanism of Action

Dolonat is a fixed-dose combination product containing paracetamol and tramadol. The mechanism of action is multimodal, operating through two distinct pharmacological agents.

Paracetamol primarily modulates endogenous chemical signaling. While its exact central mechanism is not fully elucidated, it is understood to act through the inhibition of cyclooxygenase enzyme function, particularly in the central nervous system, which results in a modified synthesis of prostaglandin signaling molecules.

Tramadol is a centrally acting compound. Its mechanism involves two separate pathways: it functions as an agonist at the mu-opioid receptor (MOR) in the brain and spinal cord, with its active O-desmethyl metabolite (M1) exhibiting a higher affinity for the MOR. Simultaneously, tramadol acts as a weak inhibitor of the neuronal reuptake of norepinephrine and serotonin. This inhibition enhances the concentration of these monoamine neurotransmitters in the synaptic cleft, thereby facilitating descending inhibitory pathways in the spinal cord. The overall systemic physiological consequence is a combined central modulation of nociception and a reduction in localized prostaglandin-mediated peripheral inflammatory signaling.

Dosage and Administration Information

Administration Protocol and Dosing Schedule

Dolonat is administered exclusively via the oral route as a fixed-dose combination tablet. For adults and adolescents 12 years of age and older, the standard initial dose is two tablets (75 mg Tramadol / 650 mg Acetaminophen). It is an essential administration instruction that these tablets must be swallowed whole with liquid and should not be broken, chewed, or crushed. The medicine is permitted to be taken with or without food.

Use Frequency and Duration Limits

The regimen is structured for as-needed pain relief. The interval between doses must be a minimum of six hours. The total daily intake must not exceed eight tablets in any 24-hour period. Guidance for acute use specifies that the duration of treatment should be limited to five days or less. Discontinuation following prolonged use requires a gradual downward taper to cease treatment.

Population-Specific Adjustments

Specific adjustments to the regimen are required based on a patient’s status. For those with severe renal impairment (creatinine clearance < 30 mL/min), the maximum dose is restricted to two tablets every 12 hours. Furthermore, treatment is not recommended for individuals experiencing severe hepatic impairment. The combination product is not recommended for use in children under 12 years old, and the dosing interval may need to be extended for older adults over 75 years of age.

Recent Clinical Evidence

Dolonat: Recent Clinical Evidence

This overview summarizes the official research evidence for the Tramadol and Acetaminophen fixed-dose combination, describing the types of studies conducted and the specific outcomes they have examined in different pain conditions. This summary is strictly descriptive and does not offer clinical advice, dosing recommendations, or safety information.

Evidence for Acute Pain Management

Research has explored the combination's role in managing sudden, short-term pain primarily through short-term, randomized controlled trials (RCTs). These studies examined outcomes related to physical discomfort, including measurements of pain intensity changes. The findings describe patterns observed in the studies where the combination showed differences in pain intensity measurements compared to those reported by placebo-controlled groups. Research highlights how studies included a comparison of the combination's pain measurements with those reported by its components used alone.

Evidence for Chronic Conditions

Research has also explored the combination's role in managing long-term symptoms related to conditions characterized by fluctuating or episodic manifestations, such as chronic low back pain (CLBP) and osteoarthritis (OA) pain. For CLBP, intermediate-term RCTs (up to 12 weeks) monitored outcomes reflecting daily functioning or activity level, utilizing tools like the Roland Disability Questionnaire (RDQ). Studies report that the difference in pain and function measurements between the active and placebo groups was observed over the study duration. For OA, the research examined the combination often as an add-on therapy to existing regimens, measuring outcomes related to physical function (e.g., WOMAC scales).

Research Gaps and Uncertainties

The evidence base for these chronic conditions is limited by the fact that follow-up durations were limited in controlled settings, meaning long-term effects are not fully established beyond three months. Data for certain groups remain insufficient, especially for pediatric populations and pregnant patients. Comparative evidence is lacking for a comprehensive understanding of how the combination compares against all other pharmacological options used for moderate-to-severe pain, which remains an area of uncertainty.

Frequently Asked Questions (FAQ)

Common questions about Dolonat (FAQ)

Q: Is Dolonat the same type of medicine as [similar drug name]?

A: Regulatory documents state that Dolonat is a fixed-dose combination medicine. This means it contains two distinct active agents: a non-opioid analgesic (Acetaminophen) and an opioid analgesic (Tramadol). Its dual mechanism of action is what sets it apart from single-agent pain relievers.

Q: What kind of follow-up monitoring is recommended while on Dolonat?

A: Official product information describes required adjustments and monitoring considerations for certain conditions. Specifically, official guidance mentions monitoring of liver function, especially for those with pre-existing liver conditions. Adjustments to the administration are also required for individuals with severe kidney problems.

Q: Is the effectiveness of Dolonat supported by meta-analyses or systematic reviews?

A: The regulatory approval for Dolonat is based on the findings of randomized controlled trials (RCTs). These controlled clinical studies, summarized in the official documentation, examine the product's effectiveness in managing pain.

Q: Can I take Dolonat if I have liver disease?

A: Official warnings state that the use of Dolonat is not recommended for individuals who have severe hepatic impairment (severe liver disease). Official documents indicate the need for caution and potential administration adjustments in patients with pre-existing liver conditions.

Q: Why is Dolonat sometimes prescribed for conditions other than its main use (not off-label advice, but general understanding)?

A: Research described in regulatory documents has examined the product's use in various conditions characterized by pain. This includes studies in patients with conditions such as chronic low back pain and osteoarthritis pain.

Q: Is the dosage of Dolonat fixed, or does it depend on the condition?

A: The product is officially indicated for the short-term management of acute pain (five days or less) and is a fixed-dose combination tablet. Official guidelines describe administration adjustments as needed based on individual factors like renal function or age.

Q: Why are people talking about a specific ingredient in Dolonat online?

A: Dolonat contains two active ingredients, each carrying official warnings. Tramadol is a synthetic opioid component that has warnings regarding risks of addiction and respiratory depression. Acetaminophen (Paracetamol) carries warnings regarding the potential for liver toxicity (hepatotoxicity).

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

A: Based on official pharmacokinetic studies, the Tramadol component typically reaches its peak concentration in the body in approximately two to three hours after it is taken. This time frame describes when the component typically reaches its highest level in the bloodstream, according to pharmacokinetic studies.

Q: If I miss a dose of Dolonat, what is the general recommendation?

A: Official guidance describes the standard practice of skipping a missed dose and resuming the regular administration schedule at the next scheduled time. Taking double the amount of medicine is not advised.

Q: Is Dolonat a controlled substance or habit-forming?

A: The Tramadol component of Dolonat is federally classified in some regions as a Schedule IV controlled substance. Official warnings explicitly state the potential risks of Addiction, Abuse, and Misuse, as well as the potential for the development of Physical Dependence.

Q: What are the signs of an allergic reaction to Dolonat?

A: Official documentation specifies that symptoms of a severe allergic reaction (hypersensitivity) may include rash, itching, swelling of the face, tongue, or throat, or difficulty breathing.

Q: Is there a generic version of Dolonat available?

A: Yes, the active ingredient combination, Tramadol and Acetaminophen, is officially available in a generic formulation approved by regulatory agencies. Generic formulations contain the same active ingredients as the brand name product.

Q: Is the onset of action different for the various forms of Dolonat (if applicable)?

A: The official product is only available as a fixed-dose combination oral tablet. If a medicine were available in different forms, such as immediate-release versus extended-release, official documentation would describe different time-to-peak effects. However, this specific product is a single type of oral tablet.

Q: How should Dolonat be stored at home?

A: Official instructions mandate that the medicine must be kept out of the sight and reach of children and pets, secured in its original container. It should be stored at Controlled Room Temperature (e.g., 20 C to 25 C), protected from moisture.

Q: Can Dolonat be crushed or split if the person has trouble swallowing?

A: Regulatory instructions strictly mandate that the tablets must be swallowed whole when taken. The official guidance states that the tablets should not be broken, chewed, or crushed.

Q: How long does Dolonat stay in the body after the last dose?

A: Pharmacokinetic data states that the plasma elimination half-life is approximately 5 to 6 hours for the Tramadol component and 2 to 3 hours for the Acetaminophen component in healthy adults.

How should Dolonat be stored and disposed of?

Dolonat (Tramadol Hydrochloride and Acetaminophen) must be stored and disposed of according to specific regulatory requirements due to the opioid component.

Storage Requirements

The tablets must be stored at Controlled Room Temperature, ideally between 20 C and 25 C (68 F and 77 F), with protection from moisture and excessive heat. Do not freeze the medication. To prevent accidental poisoning, it is a mandatory requirement to keep the medicine out of the sight and reach of children and pets, securely in its original container.

Disposal Instructions

Official disposal guidance prioritizes taking unused or expired tablets to a drug take-back program. If a take-back option is unavailable, the tablets must be mixed with an undesirable substance, such as dirt or cat litter, sealed in a container, and then discarded in the household trash. It is explicitly prohibited to flush the tablets down the toilet or pour them down a sink. All personal identifying information must be obscured on the container before disposal.

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

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