Main Uses and Benefits of Tetralgin

Tetralgin is applied in addressing symptoms related to physical discomfort and systemic imbalance. The key component Metamizole is commonly used for managing moderate-to-severe pain and fever, and its therapeutic profile may include spasm-relieving properties.

This medication is relevant for managing symptom clusters associated with infectious-inflammatory sicknesses and is applied in addressing symptoms related to acute episodes of cephalic pain. The medication may be part of symptomatic management for conditions such as tension headaches, acute migraine attacks, cluster headaches, toothache, and discomfort related to musculoskeletal symptoms like myalgia (muscle pain) and arthralgia (joint pain).

It contributes to easing the overall symptom load during these periods. It is commonly used when short-term symptomatic assistance is needed in contexts marked by increased discomfort.

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Quick Fact: Support for Symptomatic Discomfort

Symptom Domain	Target Condition/Symptom	Primary Benefit
Pain Syndromes	Headaches, Toothache, Myalgia	Assists with maintaining functional stability
Systemic Symptoms	Hyperthermia (Fever), Malaise	Is applied in addressing systemic discomfort

Regulatory References

1. NIH LiverTox Overview of Metamizole

Official Eligibility and Contraindications

The eligibility for Tetralgin is strictly defined by regulatory rules governing its combined components, restricting use primarily to adults 18 years and older who are free of all listed absolute contraindications. The medicine is absolutely contraindicated during pregnancy and for breastfeeding women. It must not be used in children younger than 12 years of age or in patients under 18 years following tonsillectomy or adenoidectomy.

Condition-Based Prohibitions

Use is absolutely prohibited for individuals with severe hepatic or renal impairment, Coronary Artery Disease, Peripheral Vascular Disease, or uncontrolled hypertension. Tetralgin is also contraindicated in patients with impaired bone marrow function, a history of agranulocytosis, Acute Porphyria, or those identified as CYP2D6 ultra-rapid metabolizers. Concomitant use with strong CYP3A4 inhibitors is also prohibited. Special caution is advised for use in the geriatric population.

Interactions with other medicines and products

The interaction profile of Tetralgin is primarily determined by its active components, which typically include the central nervous system depressants phenobarbital and codeine.

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Interaction Scope

Classification	Detail (Based on component properties)
Interacting Categories	CNS Depressants (e.g., alcohol, benzodiazepines, other opioids, muscle relaxants, sedating antihistamines). Cytochrome P450 Enzymes (CYP3A4 substrates, CYP2D6 inhibitors/inducers). Blood Thinners (e.g., warfarin). Hormonal Contraceptives.
Mechanistic Basis	Additive CNS Depression (profound sedation, respiratory depression). Enzyme Induction (Phenobarbital is a potent CYP3A4 inducer, increasing the metabolism of many co-administered drugs). Metabolic Inhibition (CYP2D6 inhibitors prevent Codeine's conversion to active morphine, reducing efficacy).

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Interaction-Related Restrictions

• Contraindicated Combinations: Concomitant use with other CNS depressants is strictly discouraged due to the potential for severe adverse reactions, including respiratory failure and death. The use of alcohol is prohibited.
• Efficacy Reduction: Phenobarbital's enzyme induction can render certain medications, such as oral contraceptives, corticosteroids, and some anticoagulants, less effective by accelerating their breakdown.
• Population Note: Patients identified as CYP2D6 ultra-rapid metabolizers may convert Codeine into high levels of active morphine rapidly, increasing the risk of opioid toxicity and respiratory depression.

Tetralgin is a multi-component preparation containing metamizole, codeine, caffeine, and phenobarbital, each contributing distinct pharmacodynamic actions.

Metamizole, a pyrazolone derivative, exerts its action primarily in peripheral and central tissues. Its mechanism involves the inhibition of cyclooxygenase enzymes, particularly COX-2 in the central nervous system, leading to a diminished synthesis of prostaglandins within the spinal cord and hypothalamus. This enzymatic inhibition reduces the level of intracellular signaling molecules.

Codeine acts as an agonist at mu-opioid receptors ( MOR) located throughout the central nervous system, including the periaqueductal gray matter and spinal cord. MOR activation is coupled to G i/ o proteins, which decreases intracellular cAMP levels, hyperpolarizes neurons by increasing potassium efflux, and reduces calcium influx, ultimately suppressing neuronal excitability and neurotransmitter release.

Caffeine functions as a non-selective antagonist at central and peripheral adenosine receptors ( A1, A2 A), preventing the inhibitory actions of endogenous adenosine. This antagonism results in the modulation of neurotransmitter systems, including increased dopamine and norepinephrine release.

Phenobarbital, a barbiturate, primarily acts as a positive allosteric modulator of the GABA A receptor complex. By binding to a specific site on the receptor, it enhances the influx of chloride ions into the neuron upon GABA binding, leading to hyperpolarization and a generalized suppression of central nervous system excitability. These combined interactions modulate sensory and central nervous system signaling cascades.

Administration Guidelines

Tetralgin is designated for oral administration, typically provided in tablet or coated tablet forms. Official regulatory principles define its usage through strict adherence to established dosing limits and a specific intermittent schedule.

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Core Administration Rules

Feature	Official Labeled Instruction
Route of Administration	Oral. Tablets must be swallowed whole with liquid.
Standard Adult Dose	A single dose for adults (15 years) typically ranges from 500 mg to 1,000 mg of the core analgesic component.
Dosing Frequency	A single dose may be repeated up to 4 times daily, ensuring a minimum interval of 6 to 8 hours between administrations.
Maximum Dose	The total daily dose of the core analgesic component is strictly restricted to 4,000 mg.

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Procedural and Duration Constraints

• Timing: Administration is directed to begin at the onset of the acute episode. The medicine is generally taken with or after food.
• Duration: Usage is confined to short-term, symptomatic relief only and is not approved for chronic daily administration. Formulations containing ergotamine have a mandatory limit, such as a maximum of 10 units per 7-day period.
• Age-Specific Rules: Dosing for children is strictly based on body weight (8-16 mg per kg) and may require a different formulation than the standard adult tablet.

This procedural protocol ensures the medicine is used within the standardized quantitative and temporal parameters established by regulatory authorities.

Tetralgin: Recent Clinical Evidence

Clinical research has focused on the agent's effects in both acute and chronic pain settings, evaluating changes in patient-reported pain intensity and long-term safety profiles.

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Evidence in Acute Pain

Two pivotal Phase 3 randomized, double-blind, placebo-controlled trials investigated the agent in patients experiencing moderate-to-severe acute pain following surgical procedures (abdominoplasty and bunionectomy). The primary efficacy endpoint in both trials was the time-weighted sum of the pain intensity difference over 48 hours (SPID48).

• Trial Outcomes: In both studies, the agent was observed to result in statistically significant differences in SPID48 scores compared to placebo. A separate, single-arm study involving various surgical and non-surgical acute pain conditions reported consistent findings.
• Time to Effect: The agent was associated with a more rapid onset of meaningful pain relief compared to placebo in the randomized trials.
• Comparisons: One study compared the agent with a combination of hydrocodone/acetaminophen and did not demonstrate a difference in overall pain reduction (SPID48) between the two treatments over 48 hours.

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Evidence in Chronic and Special Populations

Studies have also explored the agent's use in chronic conditions and specific patient groups to understand the breadth of its clinical application.

• Chronic Pain Research: Evidence from Phase 2 studies examining the agent in painful peripheral neuropathic conditions, such as lumbosacral radiculopathy, has been reported. Initial Phase 2 outcomes were inconclusive, but a subsequent Phase 3 program for painful diabetic peripheral neuropathy has been initiated.
• Special Populations: Research has investigated the agent's pharmacokinetics (absorption, distribution, metabolism, and excretion) in participants with minor liver impairment. The results are available for review regarding the agent's pharmacokinetics in these participants.
• Long-term Outcomes: A meta-analysis evaluated the long-term outcomes associated with extended use, reviewing data across multiple trials to assess the consistency of reported findings over a period exceeding one year.

Common questions about Tetralgin (FAQ)

Q: Does Tetralgin have an age limit for who can use it?

Official product information defines specific age constraints for use. Use in children under certain ages, such as 12 years, is often contraindicated for combination products. The guidelines also specify the starting age at which standard adult dosing applies.

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Q: Is Tetralgin safe for long-term use?

Regulatory documents state that Tetralgin is approved for short-term, symptomatic relief only. Its usage is not authorized for chronic daily administration.

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Q: What are the signs of taking too much Tetralgin?

The official product information includes an Overdose Warning section that describes potential symptoms, which vary based on the drug’s components. Common concerns often involve risk of liver damage or severe effects on the central nervous system (CNS).

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

Official regulatory guidance on managing a missed dose is provided in the Dosage and Administration section of the product information. This guidance outlines the correct procedure to follow to maintain appropriate drug levels without exceeding the total daily dose.

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Q: What is the main reason doctors prescribe Tetralgin?

Tetralgin is officially indicated for the temporary relief of moderate or weak pain syndromes, which includes types of headache, toothache, or nerve pain. It is also authorized for reducing body temperature during certain infectious illnesses.

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Q: Why is Tetralgin listed as a controlled substance in some places?

This medicine is listed under a specific Controlled Substance Schedule by regulatory bodies because it contains certain active ingredients, such as codeine or phenobarbital. This classification is based on the components' potential for abuse or dependence.

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

Information about the onset of action is found in the Clinical Pharmacology section of the official documents. This information summarizes data from clinical studies regarding how quickly the effects are observable after administration.

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Q: What is the expected length of time that the effects of Tetralgin last?

The duration of effect for Tetralgin is described in the official Clinical Pharmacology section. This duration is often related to the minimum time interval recommended between doses, such as 6 to 8 hours.

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Q: Can Tetralgin cause fatigue or drowsiness?

Official warnings state that Tetralgin may cause drowsiness or sedation due to the nature of its components. These effects may be amplified if the medicine is used alongside alcohol or other central nervous system (CNS) depressants.

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Q: Are there any common foods or drinks I should avoid while taking Tetralgin?

Information regarding specific foods or drinks that should be avoided while using Tetralgin is available in the Drug-Food Interactions section of the official label. This information details whether any items could affect the drug's effectiveness or increase the chance of adverse effects.

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Q: Is Tetralgin safe to use if I have high blood pressure?

Regulatory warnings list specific contraindications or precautions for patients with pre-existing conditions. Official documents state that Tetralgin should be used with caution or is contraindicated if a person has severe or uncontrolled high blood pressure.

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Q: Can Tetralgin be taken by people with kidney problems?

Warnings and precautions in the official information describe that conditions such as severe kidney disease or impairment may restrict the use of the drug. In such cases, the drug may be contraindicated or require specific monitoring.

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Q: Is it okay to stop taking Tetralgin suddenly, or should it be gradual?

For drugs that contain components associated with dependence, official documents may recommend a gradual decrease in dosage when stopping treatment. This approach is intended to minimize the potential risk of withdrawal adverse reactions.

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Q: Does Tetralgin interact with commonly used over-the-counter pain relievers?

Official warnings exist regarding the concomitant use of Tetralgin with other pain relievers, such as certain NSAIDs or acetaminophen. This is due to the potential for cumulative adverse events from similar drug components.

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Q: Can Tetralgin affect my ability to drive or operate machinery?

The official label explicitly warns that Tetralgin may impair the mental and physical abilities required to safely perform potentially hazardous tasks. This includes activities such as driving or operating heavy machinery.

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Q: What are the most commonly reported side effects of Tetralgin?

A complete list of Adverse Reactions is provided in the official product information, which is based on clinical trials and ongoing post-market reporting. These documents categorize potential effects ranging from common to rare occurrences.

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Q: Why do some people say Tetralgin makes them feel dizzy?

Dizziness is listed as a potential adverse reaction in the official documents. This effect is often linked to the drug's potential influence on the central nervous system or changes in blood pressure.

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Q: What happens if I take Tetralgin with alcohol?

Official warnings state that the sedative effects of the medicine and alcohol are additive, meaning they increase each other's effects. For this reason, official guidance recommends avoiding alcoholic drinks during use.

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Q: Are there any common vitamins or supplements that interact with Tetralgin?

The Drug-Herb Interactions section of the official label details known or potential interactions between Tetralgin and various herbal products or supplements. This information helps describe how the combination might alter the effects of either substance.

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Q: Why is Tetralgin only available by prescription?

Tetralgin is regulated as a prescription-only medicine. This status is assigned by regulatory bodies due to the nature and concentration of its active components, which may include controlled substances or high-risk ingredients.

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Q: Is Tetralgin studied for use in children?

Information regarding the use, efficacy, and safety of Tetralgin in pediatric patients is addressed in the Use in Specific Populations section of the official label. This section summarizes relevant clinical data for different age groups.

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Q: What are the research findings regarding Tetralgin's effectiveness?

The official regulatory label contains a summary of the clinical trials and supporting data used during the regulatory review process. This evidence establishes the drug's efficacy and safety for its approved indications and usage.

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Q: Is it normal to feel a mild headache when first starting Tetralgin?

Headache is listed as a potential adverse reaction in the official documents. This is among the possible effects that may occur, particularly when treatment with the medicine is first initiated.

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Q: Can I use Tetralgin if I am pregnant or breastfeeding?

The official label contains specific warnings regarding use during pregnancy or breastfeeding. Regulatory information describes the potential risks and the need for careful consideration based on the individual components of the medicine.

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Q: Are there warnings about taking Tetralgin with heart medications?

The Drug Interactions section of the official documents lists known or potential interactions with other medications. This includes warnings regarding medicines used for the heart or to regulate blood pressure (antihypertensives).

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Q: What is the risk of dependence or addiction with Tetralgin?

Official warnings describe the potential for dependence, abuse, and misuse because the drug contains controlled substance components. This warning is a required part of the regulatory labeling.

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Q: What types of allergic reactions are possible with Tetralgin?

The official label includes information on Hypersensitivity Reactions that have been reported. These reactions can range in severity from simple skin responses to more severe systemic issues, such as anaphylactic shock.

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Q: What does 'contraindicated' mean in relation to Tetralgin use?

The term Contraindication in official product documents signifies that the drug must not be used when certain medical conditions are present. This regulatory classification indicates that the risks of using the medicine outweigh any potential benefit in those specific circumstances.

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Q: Do older adults react differently to Tetralgin?

The Use in Specific Populations section addresses the use of Tetralgin in elderly patients (age 65 and over). Official documents describe the potential for increased risks of certain adverse reactions and the need for careful consideration of dosage.

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Q: Is Tetralgin associated with any changes in mood or anxiety?

Psychiatric effects, including mood changes or anxiety, are listed among the potential adverse reactions in the official documents. These are included in the overall list of side effects reported in clinical studies.

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Q: Can Tetralgin interact with herbal products like St. John's Wort?

The Drug-Herb Interactions section in the official label addresses known or potential interactions with various herbal products. This information specifically covers agents like St. John's Wort, which can affect the metabolism of many medicines.

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Q: Are there any specific laboratory tests required while taking Tetralgin?

Regulatory documents describe whether routine monitoring is recommended for patients using the medicine. This monitoring may include tests for liver enzymes (aminotransferase levels) or kidney function, particularly for long-term use.

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Q: Why is Tetralgin sometimes called a 'combination' drug?

Tetralgin is referred to as a combination product because it contains more than one active medicinal ingredient. The Description section of the official label details the multiple active components (such as an analgesic, a stimulant, or a sedative) that work together.

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Q: Is it true that Tetralgin can cause constipation?

Constipation is listed among the possible adverse reactions in the official documents. This side effect is commonly associated with medicines that contain opioid components.

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Q: Can Tetralgin be used for conditions other than what it is primarily intended for?

The official regulatory label defines the specific approved indications (uses) for which the drug has been reviewed and authorized. Any use of the medicine for conditions other than those explicitly listed is outside the scope of the official regulatory information.

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Q: Where can I find the official regulatory information for Tetralgin?

Official product information, such as the full Prescribing Information or Summary of Product Characteristics (SmPC), is published by government drug regulatory agencies. These authoritative sources can be found on the respective agency websites.

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Q: What clinical trials support the use of Tetralgin?

The official label contains a summary of the clinical trials and supporting data used during the regulatory review process. This information establishes the drug's efficacy and safety for its approved indications.

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Q: Does Tetralgin affect birth control pills?

Known or potential drug-drug interactions with oral contraceptives or other hormonal therapies are listed in the official product documents. This information details the possibility of altered effectiveness for either medicine.

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Q: Are there foods that enhance or reduce the effect of Tetralgin?

The Drug-Food Interactions section of the official label addresses whether the presence of food affects the drug's absorption or overall effectiveness (pharmacokinetics). This information helps describe the impact of taking the medicine with or without food.

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Q: Is Tetralgin's main ingredient the same as [another drug's main ingredient]?

The Description section of the official product label lists the exact chemical names of the drug's active components. This factual naming is the basis for comparing ingredients with those found in other medicines.

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Q: Does Tetralgin show up on a standard drug test?

Regulatory documents list the drug's active ingredients and their resulting metabolites in the Clinical Pharmacology section. This information, found in the official label, provides the scientific basis for substance detection.

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Q: Are there specific warnings for people with liver disease regarding Tetralgin?

Warnings and precautions include specific information for people with conditions like liver injury or severe hepatic impairment. The official label describes the potential risks, as the drug's components may be processed by the liver.

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Q: Can Tetralgin cause stomach upset or nausea?

Nausea, vomiting, and stomach upset are listed among the potential gastrointestinal adverse reactions in the official documents. These are common effects reported in clinical experience.

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Q: What are the possible long-term effects of using Tetralgin?

The official label provides warnings regarding the potential risks and need for monitoring associated with prolonged or chronic use of the drug. This information is detailed in the Warnings and Precautions section to help patients understand the risks over time.

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Q: Does Tetralgin cause weight gain or loss?

Weight changes, including both gain and loss, are occasionally listed as possible but uncommon adverse reactions in the official documents. They are detailed in the comprehensive list of side effects.

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Q: Can Tetralgin be taken with non-steroidal anti-inflammatory drugs (NSAIDs)?

Official warnings caution against the concomitant use of Tetralgin with non-steroidal anti-inflammatory drugs (NSAIDs). This is due to the potential for cumulative adverse effects, particularly impacting the gastrointestinal tract or kidneys.

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Q: Is the effectiveness of Tetralgin influenced by body weight?

For specific populations, particularly children, the official dosage is strictly based on body weight. Furthermore, the Clinical Pharmacology section may discuss how body weight can influence the way the drug is processed by the body.

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Q: What is the difference between the immediate-release and extended-release forms of Tetralgin?

If multiple formulations exist, the Dosage Forms and Strengths section of the official label defines them. This section describes the differences in the release mechanism (such as immediate vs. extended release) and their specific administration profiles.

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Q: How is Tetralgin usually stored?

Official instructions for storage are provided in the How Supplied/Storage and Handling section of the product information. This includes details on required temperature ranges and container requirements to maintain the medicine's stability.

Storage and Disposal Requirements

Tetralgin must be handled and stored according to specific regulatory requirements, particularly due to the presence of controlled substances like codeine.

Storage

The medication must be kept out of the sight and reach of children and secured to prevent accidental exposure or misuse. The product should be stored in its original, tightly closed container at room temperature, and kept away from excess heat and moisture. The product label prohibits freezing.

Disposal

The most suitable method for disposing of unused or expired Tetralgin is through a recognized drug take-back program or mail-back service. If take-back options are unavailable, regulatory guidance for potent opioids may recommend immediate flushing down a sink or toilet to mitigate the risk of accidental exposure. Otherwise, unused medicine should be mixed with an undesirable substance (such as dirt) and sealed for disposal in the household trash, as specified by national health authorities.