Benketol

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Medically reviewed

Rosario Oropesa

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 Benketol

What is Benketol and Its Classification?

Benketol is the trade name for a potent medication whose active compound is Ketorolac tromethamine. It is formally classified as a Nonsteroidal Anti-inflammatory Drug (NSAID), belonging to the heteroaryl acetic acid derivatives subgroup. This is a synthetic compound that is designated as a prescription-only medicine due to its high analgesic potency. Ketorolac is recognized for its effectiveness in providing relief from moderate-to-severe discomfort, often utilized when stronger, non-narcotic options are required. Unlike many common NSAIDs, Benketol is typically positioned for managing acute pain rather than chronic conditions.

Composition and Available Pharmaceutical Forms

The medication is a single-ingredient product, containing only Ketorolac tromethamine as its sole therapeutic component. The drug is prepared in diverse dosage forms for corresponding routes of administration. These include oral tablets and sterile injection solution intended for parenteral (intramuscular or intravenous) delivery, providing versatility in acute care settings. Specialized preparations are also available, such as nasal spray and ophthalmic solution, which enable targeted administration for specific pain scenarios.

What is the General Purpose of Benketol?

The general purpose of Benketol is to deliver powerful analgesic (pain relief) and anti-inflammatory effects. It achieves this primarily through its mechanism as a cyclooxygenase (COX) inhibitor, which blocks the body's synthesis of prostaglandins. Prostaglandins are the lipid compounds responsible for mediating pain, fever, and inflammation; therefore, blocking their production effectively reduces the perception of discomfort and addresses the inflammatory component of the pain. The compound is known for acting quickly, a property supporting its use in short-term management of acute discomfort.

Regulatory References

  1. NIH MedlinePlus

What side effects are possible with Benketol?

Possible Side Effects and Safety Information

The official safety profile for Benketol (Ketorolac tromethamine), consistent with its classification as a potent Nonsteroidal Anti-inflammatory Drug (NSAID), is structured around explicit regulatory warnings regarding serious adverse reactions. The medicine's use is officially mandated to be short-term due to risks that increase with duration and dosage.


Key Adverse Reaction Categories

Adverse effects are categorized by the body systems they affect, according to regulatory standards (System-Organ Classes). Common reactions (incidence 1% - 10%) frequently documented in official labeling involve Gastrointestinal Disorders (e.g., nausea, dyspepsia, pain) and the Nervous System (e.g., headache, dizziness). Other systems affected include the Renal and Urinary, Vascular, and Blood and Lymphatic systems.

Serious Adverse Reactions

Regulatory documents highlight a risk of serious events, including potentially fatal Gastrointestinal bleeding, ulceration, and perforation, which can occur at any time and often without warning symptoms. There is also an increased risk of serious Cardiovascular thrombotic events (such as myocardial infarction or stroke), which may begin early in treatment. Acute renal failure and severe hypersensitivity reactions (anaphylaxis) are also listed as serious concerns.


Population-Specific and Use Limitations

Official prescribing information specifies increased safety risks for certain groups. Older adults (aged 65 and above) have a greater frequency and severity of adverse reactions, particularly gastrointestinal and renal events. The medicine is contraindicated in patients with advanced renal impairment, active gastrointestinal bleeding, or for peri-operative pain after Coronary Artery Bypass Graft (CABG) surgery. These constraints underscore the necessity for strict adherence to the limited duration of treatment.

Overdose and Emergency Response

Suspected overdose with Benketol (ketorolac tromethamine) requires immediate medical attention. Official regulatory guidance mandates contacting emergency services or a poison control center for prompt assistance. Overdose symptoms, which are often reversible with supportive care, are documented to include nausea, vomiting, epigastric pain, lethargy, and drowsiness. Tinnitus and gastrointestinal bleeding have also been associated with excessive exposure.

Overdose has the potential for severe, life-threatening outcomes, including the development of acute renal failure and hepatic dysfunction. Severe neurological manifestations such as convulsions and coma may occur in rare cases. Patients with pre-existing renal impairment or who are elderly are officially noted to be at greater risk for serious complications.

No specific antidote is known for an overdose of this medication. Consequently, the management strategy described in regulatory labels is symptomatic and supportive treatment. This may include procedures like gastric lavage or the administration of activated charcoal for recent ingestion. Close clinical monitoring of CNS, renal, and hepatic function, often requiring hospital observation, is necessary due to the potential for delayed or severe effects.

Therapeutic Uses of Benketol

What Benketol Treats: Main Uses and Benefits

Benketol (ketorolac tromethamine) is commonly used to help with the short-term management of symptoms related to acute, moderate-to-severe physical discomfort. Its use is relevant in contexts marked by increased discomfort or tension, applied in scenarios where additional management of discomfort is required. The medication is relevant for easing symptoms that typically occur after surgery.

This medication is generally applied in clinical settings that involve acute or unstable symptom patterns, helping to address symptom clusters that may become intense or disruptive. It is relevant for easing symptoms associated with acute musculoskeletal issues, post-procedural discomfort, and severe episodic manifestations such as migraines or acute menstrual pain.

“Applied in scenarios where additional management of discomfort is required, Benketol plays a role in managing symptoms while reducing the reliance on narcotic substances.”

The focus on symptoms related to inflammatory or irritative states contributes to easing the overall symptom load and supports patients during episodes of heightened discomfort.


Quick Fact: Relief for Intense Pain and Inflammation

Therapeutic Domain: Acute Pain Management and Symptom Stabilization Core Benefit: Provides supportive relief, helping to maintain functional stability Used In: Clinical settings with acute or unstable symptom patterns

Eligibility and Restrictions for Use

Who Can and Cannot Use Benketol? (Official Regulatory Information)

Official regulatory guidelines strictly define the eligible patient population for Benketol (ketorolac tromethamine) and list several absolute exclusions.

Eligibility Scope Official Regulatory Status
Approved Population Adults for the short-term management (maximum 5 days combined duration) of acute, moderately severe pain.
Pediatric Patients Not indicated for use; safety and efficacy have not been established (generally below 16 years of age).
Older Adults (ge 65 Years) Use is permitted but restricted; special caution and a reduced maximum daily dose are mandatory.

Populations and Conditions that are Contraindicated

The medicine is strictly prohibited for patients with the following conditions or characteristics:

  • Gastrointestinal Risk: Active peptic ulcer disease, recent gastrointestinal bleeding, or a history of either condition.
  • Allergy/Hypersensitivity: Known allergy to Benketol, aspirin, or any other Nonsteroidal Anti-inflammatory Drug (NSAID).
  • Renal Impairment: Patients with advanced renal impairment or those at risk for renal failure due to volume depletion.
  • Bleeding Risk: Patients with suspected cerebrovascular bleeding, hemorrhagic diathesis, or high risk of bleeding complications.
  • Cardiovascular Context: Use in the peri-operative setting of Coronary Artery Bypass Graft (CABG) surgery.
  • Physiological Status: Pregnancy (late gestation), labor and delivery, or breastfeeding.
  • Concurrent Use: Patients currently receiving aspirin or other NSAIDs.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documents classify several combinations with Benketol (Ketorolac tromethamine) as contraindicated due to the risk of significant adverse outcomes. These restrictions are based on documented pharmacodynamic and pharmacokinetic interactions.

Contraindicated Combinations

The co-administration of Benketol with the following substances is strictly prohibited as documented in regulatory labels:

  • Other Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including Aspirin, due to the cumulative risk of serious gastrointestinal adverse events.
  • Anticoagulants (such as Warfarin and Heparin) due to increased bleeding risk from enhanced platelet inhibition.
  • Probenecid, as it significantly increases and prolongs Benketol's plasma concentration by reducing its renal clearance.
  • Pentoxifylline, due to an increased risk of hemorrhagic complications.
  • Lithium, as Benketol can reduce its renal clearance, leading to elevated plasma levels.

Documented Interaction Patterns

Benketol must be used with caution when co-administered with certain medicines, as officially stated:

  • Methotrexate levels may become elevated due to reduced renal clearance by the NSAID.
  • The effect of Diuretics, ACE Inhibitors, and ARBs may be diminished, and there is a documented risk of renal function deterioration.
  • Combining with SSRIs or Oral Corticosteroids may increase the risk of bleeding or gastrointestinal toxicity.

Administration Restrictions

The total combined duration of therapy for all dosage forms of Benketol must not exceed five days. Different formulations of the drug (e.g., oral, parenteral) must not be used concomitantly.

Mechanism of Action

Blocking Enzyme Activity and Modulating Signaling

Benketol functions as a non-selective inhibitor of the Cyclooxygenase (COX-1 and COX-2) enzymes. By binding to the active sites of these enzymes, the drug prevents their normal function of converting arachidonic acid into eicosanoids. This molecular interaction modifies early steps in the eicosanoid cascade, which is the primary action that initiates the subsequent physiological changes.


Reducing the Synthesis of Prostaglandins

This key pathway effect results in a significant reduction in the synthesis of prostaglandins. Prostaglandins are lipid mediators that promote heightened physiological responses, including increased sensitivity of nerve endings and localized vascular changes. By limiting their production, Benketol alters the balance of biochemical activity within targeted local and systemic pathways.


Affecting Nociceptor Sensitization and Thermoregulation

This domain focuses on the ultimate system-level physiological consequences of lowered prostaglandin levels. The mechanism reduces the chemical factors that sensitize peripheral nerve endings (nociceptors) and also influences the hypothalamic center controlling body temperature. This results in functional changes to nociceptor sensitization and the central mechanisms of thermoregulation.

Dosage and Administration Information

How to Use Benketol

Benketol (ketorolac tromethamine) is utilized in clinical settings following strict administration guidelines. Its use is limited to short-term management; the total combined duration across all administration routes must not exceed 5 days in adults.


Official Administration Routes and Schedules

The medicine is officially administered via multiple routes, each having a distinct role in the treatment protocol:

  • Initial Treatment: Therapy is initiated using a parenteral route—either Intravenous (IV) bolus or Intramuscular (IM) injection. IV administration requires the dose to be given over no less than 15 seconds.
  • Continuation Therapy: The oral tablet form is strictly reserved for continuing treatment after the initial injection. It is never used to start therapy.
  • Topical Administration: The intranasal spray is used for specific short-term pain scenarios, requiring the pump to be primed before the first use.

Standard Dosing Constraints

Dosing is fixed and dependent on the route and patient population. For non-elderly adults weighing 50 kg or more, the maximum recommended multiple-dose regimen for injection is 30 mg every 6 hours, with a total daily limit of 120 mg. The maintenance oral dose is typically 10 mg every 4 to 6 hours, with a maximum daily limit of 40 mg.

Population-Specific Adjustments

Dosage modifications are required for specific groups. The maximum parenteral daily dose is reduced to 60 mg for older adults (65 years and over), patients with low body weight (under 50 kg), or individuals with impaired renal function. Use is generally not established for the pediatric population (patients 17 years and younger).

Recent Clinical Evidence

Research Evidence Overview: Clinical Evaluation of Benketol

This section summarizes the official research conducted on Benketol (ketorolac tromethamine), outlining the types of studies regulators rely on, the patient groups examined, and the primary questions the research was used to explore. The information presented here reflects only the evidence base and is not clinical advice.


Research for Short-Term Postoperative Pain Management

Research exploring the use of Benketol in the context of pain after surgery primarily relies on short-term randomized controlled trials (RCTs). These studies were applied in research contexts involving adult patients recovering from various procedures. Researchers typically used these trials to monitor outcomes related to physical discomfort, which was measured using validated patient-reported outcomes. Systematic reviews describe patterns observed in the studies related to the reported usage of supplemental narcotic pain medication by patients. The evidence is confined to the short-term period (up to five days). Long-term effects are not fully established, and this remains an area of uncertainty.


Studies for Acute, Moderate-to-Severe Pain

Benketol was evaluated in settings involving acute, severe episodic pain, such as conditions associated with acute or disruptive episodes. These investigations mainly used RCTs to explore short-term symptom changes in the emergency care environment. Findings indicate a pattern that suggests a 'ceiling effect,' meaning reported pain score reductions show patterns related to non-increasing change above a specific dose. The research provides insight into short-term changes immediately following the first dose, and evidence is limited for multi-dose regimens beyond this acute setting.


Evidence in Specialized Populations

For older adults, studies have primarily focused on pharmacokinetic investigations to characterize how the medicine is metabolized and cleared due to age-related physiological changes. In pediatric and adolescent populations, the research landscape is mainly composed of observational studies. Evidence quality varies across studies for this age group, and data for certain groups remain insufficient to definitively guide optimal dosing, with certainty remaining low in this area.


Key Limitations and Areas of Uncertainty

All available research was limited to a very short duration. A noted limitation is that the follow-up durations were limited across almost all research. Research is ongoing in several areas to try and address the existing evidence gaps, particularly regarding optimal use in younger populations and better characterization of the dose-response relationship. Evidence highlights what is known—and what is still uncertain—about the use of this medicine.

Key Studies & References The Analgesic Efficacy of IV and IM Ketorolac: A Systematic Review (Ceiling Effect and Acute Pain)

Frequently Asked Questions (FAQ)

Common questions about Benketol (FAQ)

Q: How quickly do people generally start to feel the effects of Benketol?

A: According to the official product information, the time it takes to reach the peak analgesic effect can vary by administration route. For the oral form, this generally occurs within approximately two to three hours. Following an injection, pain relief may begin earlier, typically within 30 minutes to one hour.

Q: Can Benketol be used long-term?

A: Regulatory documents explicitly state that the total combined duration of use, including all different forms of the medicine, must not exceed five days in adults. The medicine is indicated solely for the short-term management of acute pain, and use for chronic or long-term painful conditions is not indicated.

Q: Do I need to avoid driving while using Benketol?

A: Because Benketol can cause effects such as dizziness and drowsiness, caution is advised when performing activities that require complete mental alertness. Regulatory warnings indicate that caution should be exercised when engaging in potentially hazardous activities, such as driving or operating machinery.

Q: Are the side effects of Benketol temporary or do they usually last?

A: The majority of commonly reported adverse effects are associated with the short-term use of the medicine. However, regulatory warnings exist regarding the risk of serious adverse reactions, particularly affecting the kidneys, which can potentially develop even after therapy has ended. This underscores why the duration of use is strictly limited.

Q: What kind of studies support the use of Benketol?

A: The official evidence base that regulators rely on is primarily composed of short-term randomized controlled trials (RCTs). These studies examined the use of the drug for acute pain, particularly in the postoperative setting. This research provides the basis for the medicine's authorized uses.

Q: Is Benketol the same kind of drug as [Competitor A]?

A: Benketol's active ingredient is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID). This is a formal category of medicines that includes many different active compounds. While other drugs may also be NSAIDs, this is the official classification for Benketol.

Q: Can Benketol affect your sleep schedule?

A: Official safety information lists both drowsiness (feeling sleepy) and insomnia (difficulty sleeping) as possible adverse effects associated with the medicine. These effects are linked to changes in the nervous system.

Q: Is it common for people to gain weight while using Benketol?

A: Regulatory documents state that the occurrence of sudden weight gain and swelling of the face, hands, or feet (known as edema) is a documented side effect of the medicine. The documented effect relates to fluid retention.

Q: What happens if I miss taking a dose of Benketol?

A: Official patient information advises against taking a double dose to compensate for a missed dose. Adherence to the specific instructions provided by the prescribing health professional is required.

Q: Is there a risk of dependence or addiction with Benketol?

A: Benketol is formally classified as a non-narcotic Nonsteroidal Anti-inflammatory Drug (NSAID). Official information indicates that the medicine is not associated with a risk of dependence or tolerance.

Q: How long does Benketol stay in your system after stopping its use?

A: The elimination half-life is a measure of how quickly the body removes the medicine. This generally ranges from five to six hours in healthy young adults. However, the half-life may be longer in older adults or individuals who have reduced kidney function.

Q: Is Benketol known to cause any skin reactions?

A: Yes, official safety documents list skin reactions as reported adverse effects. These include rashes, itching (pruritus), and purpura (a type of bruising). Severe hypersensitivity reactions are also listed in the safety profile.

Q: Is it true that Benketol can cause dizziness?

A: Yes, dizziness is consistently listed in official prescribing documents as a common adverse experience, meaning it is reported in a small percentage of patients (between 1% and 10%).

Q: Can I take Benketol with common over-the-counter pain relievers?

A: Official warnings state that co-administration with other Nonsteroidal Anti-inflammatory Drugs (NSAIDs), including over-the-counter options like aspirin, is strictly contraindicated. This is due to an increased and cumulative risk of serious gastrointestinal adverse events.

Q: What should I do if I feel unusual side effects while taking Benketol?

A: Regulatory documents state that patients and professionals must remain alert for signs of serious adverse effects, such as gastrointestinal bleeding. If a serious adverse event is suspected, prompt evaluation is required, and discontinuation of the medicine may be warranted.

Q: Is there official guidance on using Benketol during pregnancy?

A: Official guidance indicates that the use of this medicine is strictly contraindicated during the third trimester of pregnancy, starting at 30 weeks gestation. Decisions regarding use prior to that time should be based on a specialized benefit-risk assessment.

Q: Is there a risk of problems if I stop taking Benketol suddenly?

A: As this medicine is not associated with dependence or tolerance, the official prescribing information does not describe a risk of withdrawal problems. The drug is intended to be used only for a short period.

Q: Can Benketol affect my liver function?

A: Official adverse reaction summaries list the possibility of effects on the liver. These include rare but serious events such as elevated liver enzymes and the possibility of liver failure. The medicine is contraindicated in patients with severe liver impairment.

Q: Do studies suggest Benketol is effective for treating chronic pain?

A: Official indications state that Benketol is approved only for the short-term management of acute pain, typically up to five days. It is not indicated or authorized for the treatment of chronic painful conditions.

Q: What if I'm taking herbal supplements; can they interact with Benketol?

A: Official interaction summaries indicate that some herbal supplements may affect the body's clotting ability and could potentially increase the risk of bleeding when taken with Benketol. Official prescribing information requires the disclosure of all supplements being taken.

Q: How long does a course of Benketol treatment typically last?

A: The total duration of a course of treatment for all dosage forms of Benketol is strictly constrained by regulatory documents. The maximum total duration of use must not exceed five days.

Q: Can Benketol cause difficulty concentrating?

A: Difficulty in concentration is listed in the official documentation as a less common adverse effect associated with the medicine. Due to this effect, caution is advised for activities that require full mental focus.

Q: What patient groups were included in the main clinical trials for Benketol?

A: The main clinical trials focused primarily on adult patients who were recovering from various procedures or experiencing acute pain. Separate investigations examined the medicine's behavior in older adults and, to a limited extent, in pediatric populations.

How should Benketol be stored and disposed of?

How to Store and Dispose of Benketol (Ketorolac Tromethamine)

Official regulatory labeling dictates specific conditions for storing and disposing of Benketol, which vary by dosage form.

Storage Conditions

Dosage Form Required Storage Condition
Oral Tablets Store at Controlled Room Temperature (15 C to 30 C / 59 F to 86 F) in a tight, light-resistant container with a child-resistant closure.
Injection Solution Store at 20 C to 25 C (68 F to 77 F). Keep in the original packaging to protect from light. Do not refrigerate or freeze.

All forms of Benketol must be stored out of the sight and reach of children.

Handling and Disposal

The injection solution is intended for single use only, and any unused contents remaining in the ampoule must be immediately discarded. Chemical stability of the diluted solution is limited to 48 hours at 25 C. Any unused or expired product must be disposed of in accordance with local requirements for medicinal waste.

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

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