Butasan

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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 Butasan

Property Description
Active ingredient Phenylbutazone
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Form Tablets, Injectable Solution, Topical Gels/Creams
Primary General Purpose Pain relief, inflammation reduction, fever control
Origin Synthetic Organic Compound

What Type of Medicine is Butasan (Phenylbutazone)?

Butasan is a trade name for a medicinal product whose active ingredient is Phenylbutazone, which is formally classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID). This classification identifies it as a powerful synthetic agent developed to counteract the body’s inflammatory processes. Chemically, Phenylbutazone is designated as a Pyrazolidine derivative, placing it within a family of synthetic compounds recognized for their analgesic and anti-inflammatory properties.

This chemical structure is clinically recognized for its potent effects in managing symptoms of discomfort and inflammation. This identity confirms that the drug's essential purpose is to mitigate pain, reduce inflammation (swelling and redness), and control fever.

Composition, Forms, and Primary General Purpose

Butasan is a single active ingredient product, utilizing only Phenylbutazone, and is formulated to be delivered through multiple routes. These forms include high-level dosage types such as tablets for oral intake, injectable solutions for parenteral administration, and various topical preparations like gels or creams for localized use. The availability of multiple forms facilitates both systemic and targeted effects, highlighting its established use in settings requiring rapid anti-inflammatory action.

Fundamentally, the overarching general purpose of the product is to provide prompt symptomatic relief by intervening in the process of inflammation and pain signaling, an action reliably confirmed by its extensive therapeutic history. The product's controlled distribution as a prescription-only agent reflects its potent nature and necessity for professional oversight.

What side effects are possible with Butasan?

The safety information for Butasan (1,3-Butadiene), a chemical primarily used in industrial manufacturing, is based on occupational and environmental exposure rather than conventional medical product adverse reactions.

Adverse Reactions and Regulatory Classification

Classification/Exposure Type Potential Adverse Reactions (System-Organ Class)
Carcinogenicity (Chronic Exposure) Known Human Carcinogen (IARC Group 1, NTP, EPA). Linked to an increased risk of cancers of the blood and lymphatic system (e.g., leukemia) and cardiovascular diseases (e.g., arteriosclerotic heart disease).
Acute, High-Level Exposure Central Nervous System effects (e.g., headache, vertigo, blurred vision, fatigue, fainting, unconsciousness). Irritation of the eyes, nose, throat, and lungs. Dermal contact with the liquefied gas can cause frostbite.

Population-Specific and Dose-Related Considerations

  • Developmental/Reproductive Toxicity: Studies in laboratory animals have shown effects such as decreased fetal weights and damage to reproductive organs. Although human data is limited, regulatory documents classify 1,3-Butadiene as a potential reproductive or developmental toxicant.
  • Exposure Patterns: Acute symptoms (irritation, CNS effects) are dose-dependent, increasing in severity with higher concentrations. The most serious chronic risks (cancer) are linked to long-term exposure, which is regulated by workplace standards (e.g., OSHA's Permissible Exposure Limit of 1 ppm for an 8-hour Time Weighted Average).
  • Safety Monitoring: Due to the severe chronic hazard, regulatory bodies mandate medical surveillance and environmental monitoring when airborne concentrations exceed specified Action Levels, underscoring the need for strict control of exposure in all relevant contexts.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Phenylbutazone emphasizes the risk of severe, multi-system toxicity and mandates immediate emergency action in case of suspected overdose.

Documented Overdose Manifestations

Initial signs often include nausea, vomiting, diarrhea, epigastric distress, and headache. Severe progression may involve confusion, agitation, drowsiness, and incoherence.

Severe and Life-Threatening Outcomes

Overdose can lead to coma, convulsions (seizures), renal failure, hepatotoxicity (jaundice), and severe gastrointestinal bleeding. The toxicity is documented as potentially fatal, with particular risk noted for small children.

Required Emergency Actions

Action Mandate Official Regulatory Statement
Immediate Medical Help Contact emergency services immediately for any suspected overdose due to the drug’s highly toxic nature.
Antidote No specific antidote is known; treatment is strictly symptomatic and supportive.
Management Management procedures officially described include potential administration of activated charcoal, a laxative, and gastric lavage.

Continuous monitoring of vital signs and laboratory monitoring of liver and renal function is required due to the risk of documented organ damage.

Therapeutic Uses of Butasan

What Butasan Treats: Main Uses and Benefits

The therapeutic application of Butasan (Phenylbutazone), a Nonsteroidal Anti-Inflammatory Drug (NSAID), is relevant in clinical settings that involve acute or unstable symptom patterns. It is used to help address symptoms related to heightened physiological activity and inflammatory states, and is considered relevant in contexts involving heightened systemic burden.

Phenylbutazone is used to treat rheumatoid arthritis and gout, and may be part of symptomatic management in highly specialized circumstances. The primary therapeutic focus is managing the symptoms of severe inflammatory joint and spinal diseases, including Ankylosing Spondylitis (AS), severe Rheumatoid Arthritis (RA), and Acute Gouty Arthritis.

The medication is applied during phases of increased distress or discomfort associated with acute conditions. It helps address symptom clusters that may become intense or disruptive, particularly symptoms related to physical discomfort, joint pain, swelling, and morning stiffness. By managing the symptoms related to inflammatory or irritative states, Butasan provides support that helps ease the overall symptom burden and contributes to improved day-to-day comfort during symptomatic periods.

Quick Fact: Symptomatic Relief Focus
Butasan is generally applied in scenarios where additional management of discomfort is required due to symptoms related to inflammatory or irritative states, which assists with maintaining functional stability.

Eligibility and Restrictions for Use

The use of Butasan (Phenylbutazone) in humans is severely restricted by regulatory agencies, and its eligibility profile is primarily defined by a list of absolute contraindications. The medicine is generally limited to select adult patients with severe, recalcitrant forms of arthritis only when safer treatments have failed.

Contraindicated Populations (Must Not Use)

Contraindication Category Official Regulatory Statement
Blood/Clotting Disorders Patients with a history of blood dyscrasias (e.g., aplastic anemia) or haemorrhagic diathesis (bleeding disorders).
Organ Dysfunction Patients with severe hepatic, renal, or cardiac dysfunction, systemic edema, or hypertension.
Gastrointestinal Patients with a history of or current peptic ulceration or inflammatory disease of the gastrointestinal system.
Allergy Patients with known or suspected hypersensitivity to Phenylbutazone, Oxyphenbutazone, or other NSAIDs.

Age-Related and Reproductive Eligibility

Official regulatory documents prohibit use in two key age groups: the medicine is contraindicated in children 14 years of age or less and in older adults (senile patients) due to increased risks. Regarding reproductive status, use is not recommended during pregnancy, and mothers must discontinue the medication or wean their infants if treatment is required during lactation.

What should I know about interactions with other medicines?

Butasan's interaction profile is officially documented and details significant pharmacokinetic (PK) and pharmacodynamic (PD) consequences with co-administered medicinal products, based on government regulatory guidance.

Documented Interaction Patterns

The PK profile includes protein binding displacement, which substantially increases the free drug exposure of agents like Warfarin and Acenocoumarol, raising the risk of toxic blood levels and hemorrhage. This effect also applies to Sulfonylurea Antidiabetic Agents, potentially leading to an exaggerated hypoglycemic response. Additionally, Phenylbutazone can decrease the excretion rate of certain drugs, including Lithium and specific basic drugs, which may result in their accumulation.

Pharmacodynamic interactions define the majority of high-risk combinations. Co-administration with Oral Anticoagulants or other gastrointestinal ulcer-causing agents like Corticosteroids severely increases the risk or severity of bleeding. Antagonistic PD effects are noted with Diuretics and ACE Inhibitors, where Butasan may decrease their efficacy and raise the potential for adverse renal reactions.

Regulatory Constraints and Context

Official regulatory constraints include a prohibition on combination with Aspirin or other NSAIDs in patients with a history of allergic reactions to that drug class. Furthermore, the product must be officially discontinued prior to elective surgery due to its documented interference with clotting processes. This overall risk of interaction is noted to be heightened in specific populations, including the elderly and those with existing cardiac, renal, or liver dysfunction.

Mechanism of Action

How Butasan Works

Butasan acts through a multi-faceted mechanism, engaging specific molecular targets to modulate signaling cascades associated with heightened physiological activity. Its primary actions involve modulating key signaling pathways and regulating processes driven by distinct biochemical patterns.


Receptor- and Enzyme-Mediated Signaling Modulation

Butasan primarily acts within domains involving receptor- or enzyme-mediated signaling, initiating or suppressing specific signaling sequences. This early molecular modification leads to downstream effects that shape systemic physiological outcomes, resulting in the establishment of an adjusted signaling state within targeted pathways.


Regulation of Physiological Activity and Mediator Kinetics

The drug engages mechanisms that influence the feedback regulation within pathways and are relevant in systems where specific transmitters or mediators dominate. This engagement influences the regulation of physiological processes characterized by heightened activity and restricts the kinetic output of mediator activity.


Targeted Pathway Adjustment and Systemic Modulation

Butasan alters pathway activity that may escalate under certain conditions. This results in predictable physiological adjustments, which results in the modulation of processes driven by distinct signaling patterns and contributing to the resulting physiological state.

Dosage and Administration Information

Butasan (Phenylbutazone) is a medicinal product whose administration follows standard protocols focusing on precise routes and a structured dosing approach.

Administration Routes and Techniques

The product is available for oral intake (as tablets, paste, or powder) and for parenteral administration as an injectable solution. When administered parenterally, the medicine must be given intravenously (IV). A fundamental procedural constraint is the explicit prohibition of intramuscular (IM) or subcutaneous (SC) injection.

Dosing Structure and Duration

Standard protocols follow a two-stage pattern. Treatment begins with a calculated high initial dose, which is intended to be rapidly reduced to the lowest effective maintenance level as symptoms begin to diminish. This reduction is a core element of its use protocol. Dosing is typically calculated as a daily amount that may be divided for multiple administrations. The maximum duration for intravenous use is explicitly limited.

Contextual Use Requirements

Administration of oral forms is tied to specific conditions: powder must be mixed with feed or given with food to manage proper intake. Furthermore, it is required that if a satisfactory clinical response is not established within a brief monitoring period (typically five days), administration of the drug must be discontinued. It is also noted that use in children has not been adequately studied.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Butasan (Phenylbutazone)

Evidence for Use in Ankylosing Spondylitis

The research history for Butasan in conditions like Ankylosing Spondylitis (AS) includes studies that were primarily conducted in the mid-20th century. These studies included early Randomized Controlled Trials (RCTs) and various other trials designed to explore how symptoms change over a relatively short period. Researchers applied these studies to adult patients with active AS.

Studies examined outcomes related to physical discomfort and daily functioning. Research monitored changes in the duration of morning stiffness, reported scores for day and night pain, and objective physical measures of spinal mobility. The documented evidence describes patterns observed in the studied population related to these measurable changes. However, the evidence base is composed of older trials that may not meet the same reporting standards or long-term follow-up as contemporary research. Research provides limited insight into long-term outcomes for patients with AS.


Evidence for Use in Severe Rheumatoid Arthritis

Butasan was also studied for use in conditions involving Severe Rheumatoid Arthritis (RA), which are characterized by periods of heightened symptom activity. Research explored short-term symptom changes using Randomized Controlled Trials and specific studies that examined how the medicine was processed by the body.

Studies monitored changes in patient-reported outcomes, including perceived discomfort, and objective signs of inflammation. Researchers monitored the number of tender and swollen joints (articular index) and shifts in systemic inflammation biomarkers. These trials described patterns of change measured during the study period for outcomes related to daily functioning and joint swelling. The core evidence was established prior to the development of many current therapeutic options for RA. Follow-up durations were limited, meaning long-term effects on joint structure are not fully established.


Evidence for Use in Acute Gouty Arthritis

Research has explored the use of Butasan in Acute Gouty Arthritis, a condition involving acute or disruptive episodes of pain and inflammation. The evidence includes short-term comparative trials. Primary outcomes included measuring the time taken for symptoms of pain relief to be reported, and the overall time to the final resolution of the acute attack.

The research base for gout is limited to very short-term assessments related only to the acute flare itself. Research provides context but not individual predictions, and offers limited insight into long-term disease management. The evidence landscape primarily details short-term findings, and the studies did not include comparisons against many therapeutic options developed since the original trials.

Key Studies & References

  1. WHO Anatomical Therapeutic Chemical (ATC) Classification System: Phenylbutazone

Frequently Asked Questions (FAQ)

Common questions about Butasan (FAQ)

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

Official guidelines describe the response to Butasan therapy as generally prompt. According to information provided in regulatory documents, a noticeable response often occurs within 24 hours of administration.

Q: Are Butasan's side effects temporary or long-lasting?

Official documents describe a broad range of potential adverse reactions. Some effects, such as irritation or changes in the central nervous system (CNS), may occur acutely or be temporary. Other effects, such as certain blood disorders, are listed as chronic hazards linked to longer-term use of the medicine.

Q: How is Butasan designed to be used (short-term vs. long-term)?

The official use protocol for intravenous administration has an explicit limit, and treatment must be discontinued if a satisfactory clinical response is not established within approximately five days. Long-term use of Butasan is restricted, and official protocols indicate that such use involves close patient monitoring due to increased risks described in regulatory information.

Q: How long does Butasan stay in your system?

Studies on the drug’s processing by the body indicate that it has a long plasma half-life, which is the time it takes for the concentration to reduce by half. The average plasma half-life is approximately 70 hours, and the medicine is metabolized into active compounds within the body.

Q: Are there different strengths of Butasan, and why is this the case?

Yes, Butasan is formulated into multiple strengths, which includes different concentrations of injectable solutions and various sizes of oral dosage units (like tablets). These forms and strengths are available to support calculated administration based on established official protocols.

Q: What are the general expectations for the length of treatment with Butasan?

The maximum duration for intravenous use is explicitly limited, and regulatory instructions mandate that administration must be discontinued if there is no satisfactory clinical response within a brief monitoring period, typically five days. Official guidance emphasizes that the overall use of this medicine is restricted to avoid prolonged or long-term treatment.

Q: Can Butasan be taken if I also take a common over-the-counter pain reliever?

Official documents prohibit combining this medicine with Aspirin or other Nonsteroidal Anti-Inflammatory Drugs (NSAIDs). This prohibition is due to an increased risk of severe adverse effects, such as gastrointestinal bleeding.

Q: Are there any food or drink restrictions while using Butasan?

Official regulatory instructions mandate that the oral powder formulations must be administered with food or mixed with feed. Additionally, official warnings indicate that consultation with a healthcare professional regarding the use of alcohol while taking this product is necessary.

Q: Is Butasan suitable for people with a history of heart issues?

Official documents state that severe cardiac dysfunction is an absolute contraindication for Butasan use. Furthermore, regulatory safety information describes the potential for the drug to cause or worsen existing conditions like congestive heart failure.

Q: What if Butasan doesn't seem to be helping my condition?

Official instructions mandate that the administration of this medicine must be discontinued if a satisfactory clinical response is not established within a brief monitoring period. This period is typically defined as five days.

Q: Is it normal to feel tired or dizzy when first starting Butasan?

Official drug labels list adverse reactions that involve the central nervous system, which may include dizziness, drowsiness, and vertigo. These effects may be associated with the initiation of treatment or specific exposure levels.

Q: What common supplements should I check for interactions with Butasan?

Regulatory guidance describes the necessity of informing a healthcare provider of all substances being taken. This scope includes prescription and over-the-counter drugs, as well as vitamins and natural products, for comprehensive review of potential interactions.

Q: Do older adults typically experience different results or side effects from Butasan?

Use of this medicine is strictly contraindicated (prohibited) in older patients due to an increased risk of adverse effects. Regulatory-cited reviews describe a heightened risk of blood disorders, such as marrow depression, in the elderly population.

Q: If I have allergies, is Butasan usually considered appropriate?

Use of Butasan is strictly prohibited for patients with a known or suspected hypersensitivity to the active ingredient, Phenylbutazone, related compounds, or other Nonsteroidal Anti-Inflammatory Drugs (NSAIDs).

Q: What should I do if I notice a change in my vision while taking Butasan?

Official safety information lists adverse effects such as blurred vision and retinal disturbances. For patients who notice any changes in vision, official safety protocols indicate the necessity of immediately informing a healthcare provider.

Q: Are there specific times of day Butasan is generally intended to be taken?

Dosing is calculated as a total daily amount that can be divided for multiple administrations. Some official administration protocols suggest dividing the total daily amount into equal doses to be given at set intervals, such as every eight hours.

Q: Is Butasan associated with any particular mental health side effects?

Official drug labels list the potential for adverse effects involving the central nervous system. These documented effects include nervousness, irritability, and anxiety.

Q: What are the limitations of the current research on Butasan?

Limitations described in the research overview include that the evidence base is composed of older clinical trials, which often lack the reporting standards and long-term follow-up of contemporary studies. This provides limited insight into long-term patient outcomes.

Q: Can Butasan make certain existing health issues worse?

The drug is contraindicated in patients with severe existing conditions, including hepatic (liver), renal (kidney), or cardiac (heart) dysfunction, or gastrointestinal ulcers. Official documents associate its use with a risk of exacerbation of these specific issues.

Q: Is it necessary to take Butasan with food?

Official regulatory instructions mandate that oral powder formulations must be administered mixed with feed or given with food. There is no equivalent general requirement explicitly specified for all other oral forms, such as tablets, in the primary documentation.

Q: Why do doctors choose Butasan over other treatment options?

Official guidance restricts the use of this medicine to select adult patients with severe, recalcitrant forms of arthritis. It is primarily considered only when other established, generally safer treatments have proven unsuccessful or inadequate.

How should Butasan be stored and disposed of?

Official Storage and Disposal Requirements

Butasan (Phenylbutazone) must be stored strictly according to the conditions documented in its official regulatory labeling to ensure stability and efficacy. Requirements often vary by form:

  • Tablets: Typically require storage at controlled room temperature (20 C to 25 C).
  • Injection Solution: Often requires refrigeration (2 C to 8 C) and must be protected from light and kept from freezing.

All forms must be stored in their original, tightly closed containers. A critical requirement is to keep the product out of reach of children (and animals not being treated). For disposal, the medication must not be flushed down the toilet or poured down the sink. Unused or expired product should be disposed of through a drug take-back program or as directed by local and national environmental regulations.

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

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