Pyredol

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Pyredol

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 Pyredol

What is Pyredol?

Pyredol is a pharmaceutical formulation containing the active ingredient pyridoxine hydrochloride, which is a synthetic form of vitamin B6. As an essential water-soluble nutrient, vitamin B6 plays a critical role in numerous physiological processes within the body, particularly in the metabolism of proteins, lipids, and carbohydrates.

Mechanism of Action

Inside the body, the pyridoxine found in Pyredol is converted into its active coenzyme form, pyridoxal 5'-phosphate (PLP). This coenzyme is necessary for the proper functioning of over 100 different enzymes. These enzymes facilitate various chemical reactions, including:

  • Neurotransmitter Synthesis: The production of chemicals that transmit signals in the brain, such as serotonin, dopamine, and gamma-aminobutyric acid (GABA).
  • Hemoglobin Production: The synthesis of heme, the component of red blood cells responsible for carrying oxygen throughout the body.
  • Gluconeogenesis: The process of creating glucose from non-carbohydrate sources to maintain stable blood sugar levels.
  • Immune Function: Supporting the production of lymphocytes and maintaining the health of lymphoid organs.

Clinical Applications

Pyredol is primarily utilized to address clinical conditions resulting from a deficiency of vitamin B6. While vitamin B6 is found naturally in many foods, certain health conditions, genetic factors, or the use of specific medications can interfere with its absorption or increase the body's requirement for the nutrient.

In a clinical context, Pyredol may be used to manage:

  • Vitamin B6 Deficiency: Correcting low levels of the vitamin caused by malnutrition or malabsorption syndromes.
  • Metabolic Support: Assisting in the management of certain metabolic disorders where the body requires higher levels of pyridoxine to function correctly.
  • Symptomatic Management: Addressing specific neurological or dermatological symptoms that are clinically associated with insufficient vitamin B6 levels.

By supplementing the body's natural levels, Pyredol helps restore the enzymatic activities dependent on vitamin B6, thereby supporting overall metabolic and neurological health.

Regulatory References

  1. National Institutes of Health (NIH)

What side effects are possible with Pyredol?

Possible Side Effects and Safety Information

Pyredol, which contains the active ingredient paracetamol (also known as acetaminophen), is generally well-tolerated when taken at recommended therapeutic doses. Most people experience no side effects, or only mild ones.


Common and Less Common Side Effects

Side effects are rare and typically mild, often resolving without medical intervention. These may include nausea, vomiting, indigestion, abdominal pain, or constipation.


Serious Side Effects and Warnings

Although rare, serious side effects require immediate medical attention. These include signs of a severe allergic reaction such as a rash, itching, swelling of the face, throat, or tongue, and difficulty breathing. Additionally, Pyredol has been associated with rare but potentially fatal severe skin reactions, including Stevens-Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), which begin with flu-like symptoms followed by a painful, red, or purple rash and blistering/peeling of the skin.

Liver damage is the most significant risk associated with this medication, most often resulting from taking more than the maximum recommended dose (overdose). Symptoms of liver problems may include jaundice (yellowing of the skin or eyes), upper abdominal pain, dark urine, or unusual tiredness. Seek immediate emergency help if you suspect an overdose, even if you feel well, due to the risk of delayed, severe liver injury.


Contraindications and Precautions

Pyredol should not be taken if you have a known allergy to paracetamol or any other ingredients. Caution is advised, and dose adjustments may be necessary, for individuals with impaired liver or kidney function or those with a history of chronic alcohol misuse. It is crucial to not take Pyredol with any other products containing paracetamol to prevent accidental overdose.

Overdose and Emergency Response

Pyredol's overdose profile is officially defined by the distinct and severe toxicities of its dual components: Tramadol and Acetaminophen. Overdose manifestations include severe Central Nervous System (CNS) effects, such as somnolence, coma, and seizures, leading to life-threatening respiratory depression and cardiovascular collapse from the Tramadol component. Concurrently, the Acetaminophen component carries the risk of a latent, severe outcome: acute hepatic necrosis and subsequent liver failure. Early signs of Acetaminophen toxicity may include non-specific gastrointestinal symptoms like nausea or vomiting. Due to these dual, life-threatening risks, official regulatory guidance mandates that individuals seek immediate medical attention for any suspected overdose. This requirement is absolute, especially as accidental ingestion of even a single dose can be fatal. Management procedures described in official documents require prompt symptomatic and supportive treatment, continuous monitoring, and the use of two specific antidotes: Naloxone to address severe respiratory compromise and N-acetylcysteine (NAC) to mitigate the risk of delayed liver damage. Hospitalization and serial laboratory assessment are required to monitor for potentially fatal, delayed hepatic injury.

Therapeutic Uses of Pyredol

What Pyredol Treats: Main Uses and Benefits

Pyredol is an integrated, dual-component analgesic generally applied in contexts marked by increased discomfort or tension, particularly in situations where symptoms interfere with daily comfort. This fixed-dose combination is generally relevant when short-term symptomatic assistance is needed. It is used to provide symptomatic relief, which may assist with managing symptoms that create noticeable physiological strain.

Key Therapeutic Focus

This combined therapy is commonly used across conditions presenting with acute episodes of pain which are typically challenging to tolerate, including postoperative discomfort, pain from injuries, and severe dental pain. It helps address intense symptom clusters, contributing to easing the overall symptom load during periods of acute symptoms. Furthermore, Pyredol is relevant when supportive symptom management is appropriate, such as managing discomfort that remains challenging to ease. It helps patients cope more steadily when symptoms are more noticeable and interfere with daily functioning.


Quick Fact: Relief for Moderate to Severe Acute Pain

Regulatory References

  1. National Library of Medicine's DailyMed overview

Eligibility and Restrictions for Use

Official Eligibility and Non-Eligibility for Pyredol

Regulatory documents define strict rules regarding who can and cannot use Pyredol (acetaminophen/paracetamol) primarily to prevent severe adverse reactions and cumulative toxicity.

Classification Population/Condition
Contraindicated Patients with known hypersensitivity or allergy to the active substance or any excipients.
Contraindicated Patients who are concurrently taking any other product containing the same active ingredient (acetaminophen/paracetamol).

Classification Special Consideration / Not Recommended
Hepatic Impairment Patients with severe hepatic impairment or severe active liver disease are contra-indicated for some intravenous formulations and require extreme caution and medical advice for all formulations, including dose adjustment.
Renal Impairment Patients with severe renal impairment require special caution; the time between doses must be increased (e.g., prolonged to six or eight hours).
Age-Related Use is generally not recommended for certain formulations in children under 10 or 12 years of age; specific pediatric eligibility depends on the product's strength and form.
Physiological State Pregnancy use is permitted only if clinically necessary, at the lowest effective dose, for the shortest possible duration. Lactation is generally considered compatible based on available data.

These official rules serve to protect against the risks of acute liver failure from overdose and severe allergic responses, establishing clear exclusions and mandating caution for individuals with compromised organ function.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Pyredol, a fixed-dose combination of Tramadol and Acetaminophen, has officially documented interactions primarily related to the Tramadol component's metabolic and pharmacodynamic properties, as detailed in regulatory labeling.


Official Interaction Restrictions

Co-administration with Monoamine Oxidase Inhibitors (MAOIs) is formally contraindicated, a restriction that extends to a mandatory 14-day separation period after discontinuing the MAOI. This absolute prohibition is due to the significant risk of a severe adverse pharmacodynamic event.


Documented Interaction Categories

Category Documented Interaction Pattern
Central Nervous System (CNS) Depressants Co-use results in an additive pharmacodynamic effect, increasing the risk of profound sedation and respiratory depression (e.g., with alcohol or other opioids).
Serotonergic Agents Co-administration is documented to increase the risk of Serotonin Syndrome due to additive serotonergic activity (e.g., with SSRIs, SNRIs, and certain triptans).
CYP Enzyme Inhibitors Strong inhibitors of CYP2D6 or CYP3A4 enzymes (e.g., Ketoconazole, Quinidine) cause a pharmacokinetic interaction that increases Tramadol plasma exposure.
CYP Enzyme Inducers Inducers of CYP3A4 (e.g., Carbamazepine) cause a pharmacokinetic interaction that decreases Tramadol plasma exposure, potentially reducing its effect.

Administration is also restricted with any other product containing acetaminophen or tramadol to prevent exceeding maximum daily dose limits and to avoid potential hepatotoxicity risks.

Mechanism of Action

Pyredol, which is a p-aminophenol derivative, exerts its pharmacodynamic activity primarily within the central nervous system (CNS) and is associated with multiple mechanistic pathways.

Its action involves the inhibition of cyclooxygenase (COX) enzymes, particularly in the CNS where it is proposed to act as a reducing co-substrate at the peroxidase site of prostaglandin H2 synthase (PGHS), thereby limiting the availability of the essential ferryl protoporphyrin IX radical cation. This molecular interaction reduces the conversion of arachidonic acid into prostaglandin H2 (PGH2), resulting in a downstream decrease in prostaglandin (PG) synthesis. This reduction in PG concentration modulates central thermoregulatory signaling within the hypothalamus.

Furthermore, an active metabolite, N-acylphenolamine (AM404), is generated which acts as an agonist at the cannabinoid CB1 receptors and also interferes with serotonergic descending pathways. The overall consequence is a modulation of central nervous system excitability and the restoration of core body temperature to baseline physiological setpoints via central mechanisms.

Dosage and Administration Information

How Pyredol is Used: Official Administration Guidelines

Pyredol is an oral, fixed-dose combination medication (Tramadol 37.5 mg / Acetaminophen 325 mg) indicated for the short-term management of acute, moderate to severe pain in adults. The administration protocol is defined to ensure proper usage.


Standard Dosing and Frequency

The medicine is administered orally and is managed according to specific intervals and dose limits:

  • Initial Dose: The recommended starting dose is two (2) tablets.
  • Maintenance Dose: Subsequent doses are two (2) tablets, taken as needed for pain relief.
  • Dosing Interval: Doses must be separated by a minimum of four to six hours.
  • Maximum Daily Limit: The total daily intake must not exceed eight (8) tablets (equivalent to 300 mg Tramadol and 2,600 mg Acetaminophen) in a 24-hour period.

Administration and Duration Constraints

The following instructions govern the physical use and duration of the therapy:

Instruction Category Guideline
With Food May be taken with or without food.
Preparation Tablets must be swallowed whole; they should not be crushed, split, or chewed.
Course Duration Use is limited to the short-term, typically five days or less for acute pain management.

Adjustments for Specific Populations

Dosage modification is necessary for certain patient groups to prevent accumulation:

  • Renal Impairment: For patients with creatinine clearance less than 30 mL/min, the dosage interval is extended to 12 hours, with a limit of two tablets per 12-hour period.
  • Hepatic Impairment: Use in patients with severe liver impairment is not recommended.
  • Older Adults (Over 75): Dosage intervals are extended due to changes in elimination.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Pyredol

1. Evidence for Relief of Moderate to Severe Acute Pain (General Analgesia)

Pyredol was studied for its role in managing conditions associated with acute or disruptive episodes of pain when standard single-agent non-opioid medications were not deemed adequate. Pharmacological studies and regulatory reviews examined the principles of combining its two active ingredients—Tramadol Hydrochloride and Acetaminophen—to explore how the dual action was studied to address significant pain perception. These studies explored how patient-reported outcomes describing perceived discomfort evolved in individuals requiring powerful pain intervention.

Research describes the systematic framework for using this combination as an option reserved for specific contexts. Findings describe patterns observed in the studies related to outcomes monitoring symptomatic assistance during periods of heightened symptom activity. The evidence contributes to understanding symptom patterns in populations where intervention was observed in studies. This research provides context but not individual predictions, and studies monitored changes in the overall pain signal.

2. Evidence in Specific Acute Pain Situations

The combination was evaluated in research exploring its application across common acute pain scenarios, including postoperative discomfort, pain from injuries, and severe dental pain. These combined therapy studies examined outcomes related to physical discomfort during episodes where symptoms become more noticeable. Research examined outcomes related to intense symptom clusters in patients experiencing pain identified as severe and challenging to tolerate.

In these specific acute contexts, studies report how symptoms evolved in the observed populations, focusing on the easing of the overall symptom load during the limited period of acute symptoms. Findings indicate patterns related to patient-reported outcomes describing perceived discomfort. Data show patterns related to symptomatic relief when studies were conducted during periods of increased symptom activity.

3. Study Duration: Acute Use and Follow-up Periods

The research available for Pyredol consistently focuses on outcomes measured over defined time intervals. Most studies and regulatory documentation were studied for temporary physiological imbalance, assessing changes over relatively defined time intervals that cover the acute phase. There is limited information for long-term outcomes, as research focuses on shorter follow-up durations.

4. Research Quality and What Remains Uncertain

Overall, the research for Pyredol contributes to the broader evidence landscape for treating moderate to severe acute pain. Follow-up durations were limited across many studies. Evidence quality varies across studies for the specific acute situations, and research provides insight into short-term changes, but comparative evidence is lacking in some contexts. The results apply only to the populations studied, and data for certain groups remain insufficient.

Key Studies & References

  1. Tramadol and Acetaminophen
  2. Ultracet (Tramadol Hydrochloride and Acetaminophen) - DailyMed

Frequently Asked Questions (FAQ)

Common questions about Pyredol (FAQ)

Q: Does Pyredol cause weight gain or loss?

Official regulatory documents list known common and serious side effects associated with Pyredol, such as nausea, vomiting, and potential liver damage. Weight gain or loss is not described among the commonly reported side effects in the official safety information.

Q: Is it common to have stomach issues when first taking Pyredol?

Official safety information states that common and less common side effects can include stomach issues such as nausea, vomiting, indigestion, abdominal pain, or constipation. In studies, these types of effects were often reported as mild and temporary.

Q: Can I drink alcohol while I am taking Pyredol?

Co-administration of Pyredol with alcohol is officially documented to result in an additive effect. This combination significantly increases the risk of profound sedation (extreme drowsiness) and respiratory depression (slow, shallow breathing), according to regulatory labeling.

Q: Is Pyredol safe for older people (seniors)?

Official prescribing information indicates that a longer dosage interval is necessary to be extended for older adults, particularly those over the age of 75. This adjustment is needed due to natural changes in drug elimination that occur with age.

Q: Is Pyredol safe to take while pregnant or breastfeeding?

Use of Pyredol during pregnancy is permitted only if clinically necessary, using the lowest effective dose for the shortest possible duration, as noted in official eligibility documents. Information regarding lactation is generally described as compatible in official documents based on available data.

Q: Can teenagers or children use Pyredol?

Official eligibility documents indicate that use of certain formulations of Pyredol is generally not recommended for children under 10 or 12 years of age. Specific eligibility for the pediatric population depends on the product’s strength and dosage form.

Q: What kind of monitoring is recommended when taking Pyredol?

The most significant risk described in safety information is potential liver damage. For individuals with impaired liver or kidney function, caution is advised and dose adjustments may be necessary. These adjustments are detailed in prescribing information for use under medical supervision.

Q: Why do some people say Pyredol made them feel tired?

Pyredol is known to affect the central nervous system (CNS). Due to this action, and the documented risk of profound sedation when used alongside other CNS depressants, some people may experience feelings of tiredness or drowsiness.

Q: Are the side effects of Pyredol generally mild?

Official safety information indicates that most people who use Pyredol experience no side effects, or only mild ones. These milder effects were often reported in studies to be temporary and mild. However, rare but serious side effects are also documented.

Q: Does Pyredol interact with caffeine or energy drinks?

Regulatory documents describe potential pharmacokinetic interactions with strong inhibitors or inducers of certain CYP enzymes in the liver (CYP2D6 or CYP3A4). Since some substances can influence these enzymes, it may increase or decrease the amount of the active ingredient (Tramadol) in the bloodstream.

Q: Where can I find the official regulatory information about Pyredol?

Official regulatory and authoritative information about Pyredol is publicly available from governmental sources. These include documents like the FDA Prescribing Information, the European Medicines Agency (EMA) Summary of Product Characteristics (SmPC), and the National Institutes of Health (NIH) or MedlinePlus drug information pages.

Q: Are there any warnings about driving or operating machinery while taking Pyredol?

Regulatory documents warn that co-use with Central Nervous System (CNS) depressants significantly increases the risk of profound sedation (drowsiness). The potential for impaired function resulting from this sedation is described in regulatory documents as requiring caution.

Q: Does Pyredol help with different types of pain?

Research has explored the combination of active ingredients in Pyredol across several common acute pain scenarios. Studies have specifically examined its application in cases of postoperative discomfort, pain from injuries, and severe dental pain.

Q: How often do the side effects of Pyredol happen?

Official safety information indicates that most people experience no side effects, or only mild ones. Side effects that occur are generally described as rare, and those that are mild were often reported in studies to be temporary and mild.

Q: Why did the manufacturer make Pyredol available?

The design of Pyredol involves a dual composition combining an opioid agonist (Tramadol) and a non-opioid analgesic (Acetaminophen). This combination was developed and studied for its synergistic effect in addressing significant pain perception for patients who require more intervention than single-agent medications.

Q: What does the research say about Pyredol's effectiveness?

Research studies have explored the dual action of Pyredol to address significant pain perception. These studies examined patient-reported outcomes that describe perceived discomfort in individuals who required pain intervention for acute, moderate to severe symptoms.

Q: Can Pyredol affect my mood?

The mechanism of action of one active ingredient is described as operating within the central nervous system (CNS). Official information states that it interferes with serotonergic pathways, which leads to a modulation of overall CNS excitability.

How should Pyredol be stored and disposed of?

How to Store and Dispose of Pyredol?

The official storage and disposal requirements for Pyredol are determined by its classification as a narcotic analgesic combination. These constraints are mandatory to maintain product stability and ensure public safety.


Official Storage Requirements

Condition Requirement
Temperature Store at Room Temperature (typically 20°C to 25°C).
Environment Must be kept away from heat, moisture, and direct light; do not freeze.
Security Store in a safe place and keep out of the sight and reach of children due to its controlled substance nature.
Container Keep in a closed container to protect its integrity.

Regulated Disposal Protocol

Expired or unused Pyredol must be discarded immediately following governmental guidelines. The required disposal method is a Drug Take-Back Collection program. If a take-back program is not readily available, official instructions for this specific controlled substance mandate flushing any unused tablets down the toilet to prevent accidental exposure and diversion.

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

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