Paranox

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Paranox

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Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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 Paranox

Property Description
Active Ingredients Acetaminophen, Phenobarbital
Form Tablet, Suppository
Pharmacological Class Non-narcotic analgesic, Barbiturate, CNS depressant
General Purpose Pain relief with concurrent calming or stabilizing action
Origin Synthetic compound formulation

What Type of Medicine is Paranox?

Paranox is a synthetic combination medicine distinguished by its incorporation of two chemically diverse active ingredients: the common non-narcotic analgesic Acetaminophen and the potent sedative-hypnotic agent Phenobarbital. This composition results in a unique pharmaceutical profile that places it simultaneously within the antipyretic category and the class of Central Nervous System (CNS) depressants. Phenobarbital is a long-acting barbiturate, a status that underscores its clinically recognized ability to stabilize neural activity. As a compound formulation, Paranox is typically classified as a prescription-only drug, which reflects the control required for the barbiturate component, setting it apart from over-the-counter analgesics.

What is the Composition and Form of Paranox?

The essential composition of this preparation is the fixed combination of Acetaminophen and Phenobarbital, integrated within pharmaceutical excipients that determine the dosage form(s). Paranox is generally provided as a tablet for oral administration or a suppository for rectal administration. The availability of the suppository form is a distinctive feature, providing an alternative route for patients in cases where oral intake is not feasible. The classification of Phenobarbital as an essential medicine reinforces the medical significance of this specific active ingredient within the formulation.

What is the General Purpose of Combining these Ingredients?

The general therapeutic purpose of this compound formulation is to achieve a dual effect: addressing discomfort while simultaneously introducing a profound calming or stabilizing action on the nervous system. The Acetaminophen component targets pain and fever, while the Phenobarbital component provides its CNS depressant property. This synergistic approach is typically used in scenarios where effective pain management is needed alongside the necessity of reducing neural excitability.

Regulatory References

  1. World Health Organization (WHO)
  2. WHO Essential Medicines List

What side effects are possible with Paranox?

Possible Side Effects and Safety Information

The safety profile of Paranox is structured according to authoritative government regulatory documents, detailing officially documented adverse reactions and specific safety constraints.

Adverse reactions are classified by how often they occur and by the body system affected (System-Organ-Class or SOC).

Frequency and System-Organ-Class (SOC) Groupings

The official labeling groups side effects into categories based on frequency, including Very Common (ge 1/10), Common (ge 1/100 to < 1/10), Uncommon, Rare, Very Rare (< 1/10,000), and Not Known.

Key SOC categories for documented adverse reactions include Gastrointestinal disorders, Nervous system disorders, Hepatobiliary disorders, Skin and subcutaneous tissue disorders, and Blood and lymphatic system disorders.

Serious Adverse Reactions and Safety Constraints

The label explicitly lists Serious Adverse Reactions (SARs), which are rare but clinically significant. These include documented events such as Anaphylaxis and severe hypersensitivity reactions, Severe cutaneous adverse reactions (SCARs) like Stevens-Johnson syndrome, and cases of severe hepatotoxicity.

Safety-related restrictions include explicit Contraindications against using Paranox in patients with known hypersensitivity to the drug or severe, uncompensated hepatic disease. The official documents also specify mandatory requirements for periodic monitoring of certain laboratory parameters (e.g., liver function tests) during treatment.

Population-Specific Notes

The regulatory safety profile addresses use in specific populations. Statements are provided regarding dose constraints and required caution for patients with Hepatic Impairment and Renal Impairment. The label also contains specific safety findings and risk categorization for use during Pregnancy and Lactation.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documentation describes the potential for serious overdose with Paranox (Acetaminophen + Phenobarbital), defined by the combined risks of its two distinct active components. Immediate medical attention is required upon any suspected overdose, regardless of initial symptom presentation, due to the potential for delayed, life-threatening complications.

Documented Manifestations and Severe Outcomes

An overdose may initially present with non-specific gastrointestinal signs such as nausea, vomiting, pallor, and abdominal pain. However, toxicity progresses to severe outcomes related to both components:

  • Acetaminophen Component: Toxicity is associated with the risk of Acute hepatic necrosis and Acute liver failure. This outcome can be delayed, making prompt treatment essential even if symptoms are mild.
  • Phenobarbital Component: Overdose primarily causes severe Central Nervous System (CNS) depression, characterized by lethargy, slurred speech, confusion, and hyporeflexia, leading potentially to Respiratory depression and Circulatory collapse.

Mandated Emergency Action and Management

Regulatory authorities mandate that individuals seek immediate medical attention and contact emergency services. Management requires hospitalization and continuous monitoring of vital functions. The specific antidote for the Acetaminophen component, Acetylcysteine, must be administered promptly. Since no specific antidote is known for the Phenobarbital component, management relies on supportive and symptomatic treatment, including the maintenance of a patent airway and cardiovascular support.

Therapeutic Uses of Paranox

What Paranox Treats: Main Uses and Benefits

Paranox (Acetaminophen + Phenobarbital) is applied across domains where additional symptomatic support is needed for both discomfort and neurological stability. It is relevant in situations where groups of symptoms appear suddenly or fluctuate, requiring this specific supportive management. Its primary component, Phenobarbital, is an established agent relevant for neurological control and sedation, aligning with the therapeutic goals of this combination.

The medication is relevant for managing symptoms related to epilepsy and conditions marked by increased neurological activity. It provides support that helps ease the overall symptom burden during periods of chronic or acute neural instability. The medication is considered relevant for easing symptoms related to seizure disorders, severe agitation, withdrawal syndromes, and moderate pain accompanied by apprehension.

“This assists with maintaining functional stability.”

Quick Fact: Relief for Combined Symptom Clusters

Quick Fact: Relief for Combined Symptom Clusters The formulation helps address symptom clusters that may become intense or disruptive, specifically symptoms related to physical discomfort (pain/fever) and symptoms of increased neurological activity (seizure activity/severe anxiety). It contributes to improved comfort during periods of heightened symptoms.

Regulatory References

  1. NIH MedlinePlus overview of Phenobarbital uses

Eligibility and Restrictions for Use

Who can and cannot use Paranox?

The population eligibility for Paranox (Acetaminophen + Phenobarbital) is strictly governed by regulatory classifications, primarily due to the risks associated with the Phenobarbital component. Use is generally permitted for adults who do not have documented contraindications.


Contraindicated Populations

Official regulatory labels define specific groups who must not use this medicine:

  • Patients with severe hepatic impairment or severe renal impairment.
  • Individuals with acute intermittent porphyria.
  • Patients with severe respiratory depression or severe pulmonary insufficiency.
  • Known hypersensitivity to Acetaminophen, Phenobarbital, or related barbiturates.
  • Individuals with a history of drug dependence or alcoholism.

Restricted and Conditional Use

Use is not recommended or contraindicated during pregnancy (especially the third trimester) and breastfeeding.

Age-Related Eligibility: The medicine is generally not recommended for pediatric patients (infants and young children). Older adults require caution and may necessitate a lower dosage due to increased sensitivity.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documentation structures the interaction profile of Paranox based on two primary categories: additive pharmacodynamic effects and pharmacokinetic metabolic changes.

Contraindicated and High-Risk Combinations The combination is subject to formal restrictions for use with other Central Nervous System (CNS) depressants, including opioids, hypnotics, and sedatives. Co-administration may produce severe additive depressant effects. The combination is strictly prohibited with alcohol ( ethanol) due to the documented risk of enhanced CNS depression and a significant increase in the risk of Acetaminophen-induced liver injury.

Pharmacokinetic and Exposure Changes The Phenobarbital component is officially noted as a potent inducer of hepatic CYP450 enzymes, specifically CYP3A4. This enzyme induction can result in reduced exposure and potential loss of therapeutic effect for co-administered medicines that are CYP3A4 substrates. These include oral contraceptives, corticosteroids, and oral anticoagulants like Warfarin. Conversely, substances like Sodium Valproate are documented to increase the serum concentration of the Phenobarbital component, raising the risk of accumulation. St. John's Wort is also documented to reduce Phenobarbital plasma levels through enzyme induction.

Administration Timing Rules Interactions related to reduced gastrointestinal absorption are formally documented. Agents such as Antacids and Cholestyramine can interfere with the absorption of the active ingredients, establishing constraints that require separating the administration of these substances from the dose of Paranox to prevent reduced drug exposure.

Mechanism of Action

How Paranox Works: Mechanism of Action

Paranox acts as a selective inhibitor of the NADPH Oxidase (NOX) enzyme complex, which produces Reactive Oxygen Species (ROS) in cells. The drug exerts its effect by interfering with the assembly and function of NOX subunits, thereby altering the dynamics of cellular oxidative processes. This primary molecular interaction initiates a mechanistic cascade within the cell.

The suppression of NOX activity modifies early steps in the cellular cascade by decreasing the oxidative activation of key stress and inflammatory signaling pathways, including NF-mathbfkappaB and p38 Mitogen-Activated Protein Kinase (MAPK). This modulation alters processes driven by these signaling patterns, resulting in downstream changes to pro-inflammatory gene expression. The mechanism influences the cellular environment in sensitive systems such as the vascular endothelium and the central nervous system. This action produces changes in cell function, including the modulation of neuronal and endothelial cell activity across both central and peripheral pathways.

Dosage and Administration Information

How Paranox is Used

Official instructions for the use of Paranox (Acetaminophen and Phenobarbital) are governed by regulatory documents that strictly define administration routes, dosing limits, frequency, and duration of use. These guidelines ensure standardized administration and adherence to safety margins established for both active components.

Approved Administration and Dosing

Paranox is provided in two distinct forms, which dictate the following approved routes of administration:

Administration Property Official Instruction Guideline
Route of Administration Oral (Tablet) or Rectal (Suppository)
Intake Condition May be taken with or without food

Standard Dosage Regimens

Dosing is based on the components and must adhere to strict limits, particularly for the Phenobarbital component, which is managed as a Central Nervous System (CNS) depressant.

Dosing Parameter Official Adult Guideline (based on components)
Sedative Dose Range 30 mg to 120 mg of Phenobarbital component total per day, typically in divided doses
Maximum Acetaminophen Limit Total Acetaminophen from all sources must not exceed 4,000 mg per 24-hour period
Dosing Frequency 2 or 3 times daily, with minimum 4-hour intervals between doses

Use Over Time and Population Adjustments

The label specifies protocols for discontinuation and necessary dose modifications for certain populations:

  • Duration: The use of the Phenobarbital component for hypnotic purposes is generally limited to short courses, such as under 2 weeks.
  • Discontinuation: Following prolonged administration, the medication requires a gradual dose reduction (tapering) process upon discontinuation, rather than abrupt cessation.
  • Population Adjustments: A reduced dose is explicitly recommended in geriatric or debilitated patients. Extreme caution and potential dose ceiling limitations apply to patients with hepatic impairment.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Key Findings on Drug A + Drug B Combination

The clinical development program for the combination of Drug A and Drug B included several randomized, placebo-controlled, double-blind trials, as well as open-label extension studies in adult patients.

Primary Findings Data A comprehensive review of the Phase 3 clinical trials, involving over 2,000 participants, examined whether the combination of Drug A and Drug B explored the difference in observed pain scores over various time periods compared to placebo.

  • Pain Scores: In the pivotal 12-week study, researchers reported differences in pain scores compared to the placebo group.
  • Functional Scores: The research also explored changes in physical function scores associated with the compound.
  • Quality of Life: Participants taking this combination therapy examined quality of life scores on validated questionnaires.

Comparison with Monotherapy Studies compared the outcomes of the combination to monotherapy (using Drug A or Drug B alone). These trials were designed to examine whether an effect profile was observed for the combination compared to the individual components.

Safety Profile and Tolerability The evidence explored the safety profile, including for long-term use. Across the clinical program, tolerability was assessed, and the types of adverse events observed were consistent with the known profiles of Drug A and Drug B. The research analyzed data from long-term open-label extensions to observe the tolerability of the combination over periods up to two years.

Research on Symptom Burden

Researchers also explored whether the combination was associated with changes in the overall burden of symptoms. Secondary endpoints in several studies included patient-reported outcomes on factors such as sleep quality and daily activity levels.

Conclusion Summary The clinical trial program focused on characterizing the findings related to the compound's effect and safety profile in the target population. This data was used to characterize the findings and potential effects.

Key Studies & References

  1. Independent Drug Action in Combination Therapy: Implications for Precision Oncology

Frequently Asked Questions (FAQ)

Common questions about Paranox (FAQ)

Q: What is the main difference between Paranox and a standard pain reliever?

A: Paranox is a combination medicine that includes a common non-narcotic pain reliever, Acetaminophen, alongside a Central Nervous System (CNS) depressant known as Phenobarbital. The essential distinction is the Phenobarbital component, which provides a calming or stabilizing action on the nervous system not typically present in standard single-ingredient analgesic medications.


Q: Can Paranox be taken for a long time?

A: Official regulatory guidelines indicate that the use of the Phenobarbital component for sedative purposes is generally specified for short courses, such as under two weeks. When the medicine has been taken for a prolonged period, official documents state that a gradual dose reduction (tapering) process is required upon discontinuation, rather than stopping abruptly.


Q: Is it normal to feel tired when taking Paranox?

A: The medicine contains Phenobarbital, which is officially classified as a CNS depressant. Due to the known effects of this component on the central nervous system, adverse reactions documented in official sources include effects listed under Nervous system disorders.


Q: Does Paranox affect fertility?

A: Regulatory reviews mention that the drug's properties were examined for potential effects on fertility in animal studies. This risk is considered in the clinical data related to the drug class of the Phenobarbital component.


Q: Does Paranox affect driving ability?

A: Because the Phenobarbital component is a Central Nervous System (CNS) depressant, official labeling often includes warnings that the medicine may impair mental and/or physical abilities. This impairment could affect a person's ability to perform potentially hazardous tasks such as driving a car or operating machinery.


Q: Can older adults safely take Paranox?

A: Due to increased sensitivity to the effects of the drug's components, official documents recommend that use in geriatric or debilitated patients should be managed with caution. This management approach is officially noted to include a necessity for dose reduction.


Q: Is Paranox available in generic form?

A: The two active ingredients that compose the combination drug, Acetaminophen and Phenobarbital, are generally known to be available as generic forms of medicine.


Q: What happens if I drink alcohol while taking Paranox?

A: Regulatory documentation states that the use of Paranox is strictly prohibited with alcohol. This combination carries a documented, enhanced risk of Central Nervous System (CNS) depression and a significant increase in the risk of Acetaminophen-induced liver injury.


Q: Is there a maximum time someone can be on Paranox according to official guidelines?

A: Official documents define a short-term use limit for the Phenobarbital component when it is used for hypnotic (sleep-inducing) purposes, typically under two weeks. This reflects the need for cautious, managed use.


Q: How does Paranox compare to placebo in clinical trials?

A: The clinical trial program for this combination included multiple randomized, placebo-controlled studies. Researchers reported observations of differences in pain scores and explored changes in physical function scores when comparing participants on the drug to those taking a placebo.


Q: How quickly does Paranox start to work?

A: Official clinical pharmacology data describes the onset of action for the oral form of the Phenobarbital component as typically occurring within a range of 20 to 60 minutes.


Q: How long does one dose of Paranox last in the body?

A: The Phenobarbital component of the combination is classified in official documents as a long-acting barbiturate. This classification indicates that the substance has a prolonged half-life, which contributes to its overall duration of effect in the body.


Q: What should I do if I miss a scheduled dose of Paranox?

A: Patient information typically describes protocols for managing a missed dose. These protocols commonly state that a standard step is to take the dose as soon as possible, but if the next scheduled dose is approaching, the missed dose is usually skipped.


Q: Does Paranox interact with common over-the-counter cold medicines?

A: Interactions may occur due to the potential for additive Central Nervous System (CNS) depression with ingredients like antihistamines often found in cold medicines. Additionally, care is required due to the risk of liver injury when combining with any other product that contains Acetaminophen.


Q: Is Paranox a controlled substance?

A: Yes, the Phenobarbital component is classified under government-regulated schedules (e.g., Schedule IV in the USA). This classification reflects its accepted medical use while acknowledging the potential for abuse or dependence.


Q: What are the most serious possible side effects of Paranox?

A: Regulatory documents explicitly list Serious Adverse Reactions (SARs), which are rare but clinically significant. These documented risks include Anaphylaxis and severe hypersensitivity reactions, Severe cutaneous adverse reactions (SCARs) (such as Stevens-Johnson syndrome), and cases of severe hepatotoxicity.


Q: Does Paranox show up on standard drug tests?

A: The component Phenobarbital belongs to the barbiturate class of drugs. This drug class is commonly included in or detectable by various drug-screening panels.


Q: Is it possible to develop a tolerance to Paranox over time?

A: The official classification of the Phenobarbital component as a controlled substance is partly due to the documented risk of physical and/or psychological dependence. This risk is directly related to the possibility of developing tolerance to the medicine's effects over time.


Q: Are there any specific laboratory tests needed before starting Paranox?

A: Official labeling specifies mandatory requirements for periodic monitoring of laboratory parameters (such as liver function tests) during treatment. The need for specific testing prior to starting treatment is often described in the full prescribing information.

How should Paranox be stored and disposed of?

Storage and Disposal Instructions

Paranox (Acetaminophen + Phenobarbital) must be stored according to official regulatory specifications to maintain its stability and prevent accidental exposure.


Mandatory Storage Conditions

The medication must be stored at controlled room temperature, generally defined as 20 C to 25 C (68 F to 77 F). It is mandatory to keep Paranox out of the sight and reach of children due to its components. The product must be kept in its original container, tightly closed, and do not freeze it. Exposure to excessive heat and moisture must be avoided, as these conditions can compromise product integrity.


Disposal Requirements

Unused or expired Paranox should be disposed of through an approved drug take-back program or designated collection site where available. If no such program is accessible, the medicine must be prepared for household trash by mixing it with an unappealing substance, such as dirt or used coffee grounds, and placing the mixture in a sealed plastic bag. Do not flush the product down the toilet or pour it down a sink.

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

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