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Ketorolac EG

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Ketorolac EG

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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.

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Overview of Ketorolac EG

Ketorolac EG is a medication designed to manage acute, moderately severe pain, acting as a potent Nonsteroidal Anti-inflammatory Drug (NSAID). Its identity is defined by its active component, its pharmacological class, and its specific formulation, positioning it as a tool for short-term pain relief.

Property Description
Active ingredient Ketorolac tromethamine
Form Tablet, Solution for injection, Ophthalmic solution, Nasal spray
Pharmacological class Nonsteroidal Anti-inflammatory Drug (NSAID)
General purpose Analgesia (pain relief) and Anti-inflammation
Origin Synthetic compound (Pyrrolo-pyrrole group)

Identity, Classification, and Origin

Ketorolac EG is a generic, prescription-only medicinal product whose therapeutic effect originates from the chemical compound ketorolac, provided as the tromethamine salt. Chemically, this compound is a synthetic drug classified within the pyrrolo-pyrrole group. Ketorolac is officially categorized as a Cyclooxygenase Inhibitor.

Unlike many common over-the-counter NSAIDs, ketorolac is often clinically recognized for providing significant pain relief. It possesses substantial analgesic properties, supporting its utilization in acute care settings.

Potency and General Therapeutic Purpose

This medication's core purpose is to provide robust non-narcotic pain relief and reduce associated inflammation. It operates by inhibiting the synthesis of prostaglandins, which are key biological mediators that generate pain and swelling signals. This mechanism delivers simultaneous analgesia, an anti-inflammatory effect, and a modest antipyretic (fever-reducing) capability.

Ketorolac is utilized for the short-term management of acute, post-operative pain. The drug's availability in multiple forms enhances its utility across different medical situations, including the standard tablet and a solution for injection for fast systemic relief, alongside specialized local preparations.

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What side effects are possible with Ketorolac EG?

Possible Side Effects and Safety Information

Ketorolac EG has serious safety restrictions and risks documented by regulatory authorities. The total combined treatment duration, including both oral and injectable forms, must not exceed five days in adults due to an increased risk of severe adverse events with prolonged use.

Serious and Clinically Significant Risks

Official documents highlight the potential for Serious Gastrointestinal Adverse Events, including potentially fatal bleeding, ulceration, or perforation of the stomach or intestines, which may occur at any time without warning symptoms. The medicine is also associated with an increased risk of serious Cardiovascular Thrombotic Events such as myocardial infarction (heart attack) and stroke, which can be fatal; this risk may increase with the duration of use.

Other serious reactions include Acute Renal Failure, severe hypersensitivity reactions (anaphylaxis), serious skin reactions (e.g., Stevens-Johnson syndrome), and liver damage (hepatotoxicity). The drug inhibits platelet function and is contraindicated in patients with high bleeding risk, cerebrovascular bleeding, or hemorrhagic diathesis.

Adverse Reactions by Frequency

  • Very Common (ge1/10): Headache.
  • Common (ge1/100 to <1/10): Nausea, dyspepsia, gastrointestinal pain, diarrhea, dizziness, drowsiness, edema, hypertension, and injection site pain (for IM/IV forms).
  • Rare (<1/1,000): Anaphylaxis and anaphylactoid reactions.

Population-Specific Restrictions

Ketorolac EG is contraindicated in several groups, including those with advanced renal impairment, active peptic ulcer disease, or recent gastrointestinal bleeding. Use is also contraindicated in the perioperative setting of Coronary Artery Bypass Graft (CABG) surgery and during labor and delivery due to potential adverse effects on the fetus and uterine contractions. Dosage adjustments are required for elderly patients (over 65) and patients weighing less than 50 kg, as they may be at greater risk for adverse effects.

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Overdose and Emergency Response

Overdose of Ketorolac EG, a non-steroidal anti-inflammatory drug (NSAID), may result in symptoms that are typically reversible with supportive medical care. These common signs of acute NSAID overdose generally include lethargy, drowsiness, nausea, vomiting, and epigastric pain (stomach pain). Single-drug overdoses have also been associated with hyperventilation, erosive gastritis, peptic ulcers, and renal dysfunction, which typically resolve once the medication is stopped.

When to Seek Immediate Medical Help

Urgent medical attention is required if a large overdose is suspected, or if symptoms progress to severe manifestations. While rare, more serious toxicities that may occur include gastrointestinal bleeding, acute renal failure, hypertension, respiratory depression, and coma. Anaphylactoid (severe allergic-like) reactions, which may occur even at therapeutic doses, are also a potential risk following overdose.

Overdose Management

There is no specific antidote for ketorolac overdose. Management involves symptomatic and supportive care by a healthcare provider. For a large oral overdose (estimated at 5 to 10 times the usual dose) where ingestion occurred within the last four hours, procedures such as the administration of activated charcoal and/or an osmotic cathartic may be indicated to help limit absorption. Special care should be taken with elderly or debilitated patients, as they are at a higher risk for serious gastrointestinal complications.

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Therapeutic Uses of Ketorolac EG

Ketorolac EG is commonly used as part of a therapeutic strategy designed for the short-term management of moderately severe acute pain, generally applied across domains where short-term symptom management is appropriate. The medication is applied in scenarios where additional management of discomfort is required, typically in clinical settings that involve acute or unstable symptom patterns.


The medication is relevant for conditions presenting with systemic or localized discomfort and symptoms related to inflammatory or irritative states. The medication is commonly used when short-term symptomatic assistance is needed, such as managing discomfort following surgical procedures or during acute episodes related to tissue trauma.

“The supportive approach helps ease the overall symptom burden during difficult episodes of pronounced pain and associated inflammation.”

This approach is relevant for easing symptoms that interfere with daily comfort and assists with maintaining functional stability during symptomatic periods.

Quick Fact: Relief for Acute Pain & Inflammation

Ketorolac EG provides supportive relief for:

  • Moderately Severe Acute Pain
  • Inflammatory Symptoms (e.g., swelling)
  • Systemic Discomfort (may include associated fever)

Regulatory References

  1. NIH MedlinePlus overview
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Eligibility and Restrictions for Use

Eligibility for Ketorolac EG

Ketorolac EG is an anti-inflammatory drug reserved for the short-term management of acute, moderately severe pain in adult patients. Systemic use is restricted to a maximum of five days total duration, as mandated by regulatory documents.

Classification Population Restriction
Absolute Contraindication Patients with active peptic ulcer disease or history of gastrointestinal bleeding or perforation [FDA].
Absolute Contraindication Patients with advanced renal impairment (kidney disease) or those at high risk of bleeding [EMA/FDA].
Absolute Contraindication Use during the third trimester of pregnancy, labor, delivery, or while breastfeeding [FDA].
Absolute Contraindication Those with known hypersensitivity to ketorolac, aspirin, or other NSAIDs [FDA].
Restricted Use/Caution Older adults (65 years and over) or patients under 50 kg require a reduced maximum daily dose due to increased risk of adverse events [FDA].
Not Recommended Systemic use is not indicated for pediatric patients (generally under 16 or 17 years) [Health Canada].

This eligibility profile establishes that the medicine is only permitted for non-pregnant, non-lactating adults with adequate organ function and no pre-existing conditions that pose a risk of serious bleeding events.

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What should I know about interactions with other medicines?

Ketorolac is a potent nonsteroidal anti-inflammatory drug (NSAID), and its use with other medications requires careful attention, as many combinations increase the risk of serious complications, particularly related to bleeding or kidney function.

Contraindicated Combinations (Must Not Be Used Together)

  • Other Nonsteroidal Anti-inflammatory Drugs (NSAIDs) or Aspirin: Combining with any other NSAID, including aspirin, is prohibited due to the significantly increased and cumulative risk of gastrointestinal bleeding and kidney problems.
  • Anticoagulation Agents: Ketorolac is prohibited in patients taking specific blood thinners, such as Probenecid or Pentoxifylline, and as a routine pre-operative pain reliever due to its effect on platelet function and the heightened risk of bleeding.

Combinations Requiring Caution and Monitoring

  • Blood Thinners and Antiplatelet Agents (e.g., Warfarin): Use with these medicines increases the overall risk of serious bleeding and must be monitored closely.
  • Medicines for High Blood Pressure (ACE Inhibitors, ARBs, Diuretics): Ketorolac can reduce the effectiveness of these agents and may impair kidney function when used alongside them, especially in patients who are dehydrated or have existing heart or kidney issues. Kidney function must be monitored.
  • Lithium and Methotrexate: Ketorolac can interfere with the body's elimination of these drugs, leading to elevated and potentially toxic levels of Lithium or Methotrexate in the bloodstream. Blood levels of these medicines must be checked frequently.
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Mechanism of Action

Blocking the Production of Chemical Messengers

Ketorolac EG works primarily by acting as a non-selective enzyme inhibitor. Its main biological targets are the Cyclooxygenase (COX-1 and COX-2) enzymes within the cell, which are essential for the Arachidonic Acid Cascade. By physically blocking these enzymes, the mechanism halts the synthesis of prostaglandins and other related chemical mediators, which are chemical precursors to heightened physiological responses.


Influence on Systemic Regulatory Pathways

The mechanism of reducing prostaglandins influences several physiological systems, including the peripheral nerve endings and the brain's thermoregulatory center. This systemic action reduces the chemical mediators that promote afferent nerve fiber sensitization and those that affect the set-point of the hypothalamic thermoregulatory center. This mechanism may produce physiological alterations: a downregulation of the local inflammatory signaling cascade and an alteration of the elevated thermoregulatory set-point.

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Dosage and Administration Information

How to Use Ketorolac EG

Ketorolac tromethamine is administered via specific systemic routes under strict protocols, focusing on short-term use. The oral form is designated only as continuation therapy and should not be used to initiate treatment.


Administration and Dosing Regimens

The medicine is supplied in several official dosage forms, which dictates the route of administration:

  • Oral Tablet: 10 mg strength, used for maintenance.
  • Injection Solution: For Intramuscular (IM) and Intravenous (IV) bolus administration.
  • Nasal Spray: 15.75 mg per actuation.

The total combined duration of use across all systemic forms (IM, IV, Oral, Nasal) is strictly limited and must not exceed 5 days.


Official Maximum Doses

Dosage is scheduled multiple times daily but is capped by strict maximum limits. Standard adult dosing (under 65 years and over 50 kg) is as follows:

Route Typical Dosing Frequency Maximum Daily Dose
IV/IM (Multiple-Dose) Every 6 hours 120 mg
Oral (Continuation) Every 4 to 6 hours 40 mg

Population-Specific Adjustments

Dose reduction is required for specific populations. Patients who are 65 years of age or older, weigh less than 50 kg, or have moderately elevated serum creatinine must receive a reduced maximum daily dose. For multiple-dose IV or IM regimens in these groups, the maximum daily dose is lowered to 60 mg.

Procedurally, an IV bolus must be administered over no less than 15 seconds, and increasing the dose beyond the maximums does not provide better pain relief.

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Recent Clinical Evidence

Ketorolac EG: Recent Clinical Evidence


Evidence for Short-Term Moderately Severe Acute Pain (Post-operative Setting)

Research into Ketorolac EG has primarily focused on studies examining the change in symptoms immediately following surgical procedures. The core evidence comes from short-term, randomized controlled trials (RCTs), often comparing ketorolac to placebo or opioids. The main outcomes related to physical discomfort measured included changes in patient-reported pain scores and the recording of supplemental opioid medications used by participants. Findings describe patterns related to differences in the amount of opioid pain medication recorded during the short post-operative observation period when compared to placebo groups.

However, the research is inherently limited by the short follow-up durations established for the studies. Long-term effects are not fully established, as follow-up durations are typically not extending beyond the five-day treatment course. Data for certain groups remain insufficient, particularly for patients with pre-existing conditions like kidney issues, as these individuals were often excluded from the main trials.


Evidence for Acute Pain in Emergency Settings

Ketorolac EG was evaluated in studies examining patient-reported outcomes related to acute discomfort in urgent care and emergency departments. This research explores short-term symptom changes in conditions associated with acute or disruptive episodes, such as intense muscle pain, migraines, or pain related to renal colic. Research examined outcomes related to physical discomfort by focusing on how quickly patient-reported pain scores changed. Findings indicate patterns related to differences in pain scores in the observed populations.

Evidence quality varies across studies due to the wide range of pain sources studied. Data are still emerging for some specific types of acute pain, and limited controlled data are available to comprehensively describe its use in all such research scenarios. This research provides context but does not determine whether an individual will respond similarly.

Key Studies & References

  1. Ketorolac Injection (NIH MedlinePlus overview)
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Frequently Asked Questions (FAQ)

Common questions about Ketorolac EG (FAQ)


Q: How does Ketorolac EG compare to ibuprofen or naproxen?

A: Official documents describe Ketorolac EG as a potent NSAID analgesic that is reserved for the short-term management of moderately severe acute pain. Unlike over-the-counter NSAIDs often used for minor pain, Ketorolac EG is typically not indicated for chronic conditions or general minor aches and discomfort. Its specific role in therapy is defined by its indication for short-term management of moderately severe acute pain.


Q: What is the main difference between Ketorolac EG and paracetamol (acetaminophen)?

A: Ketorolac EG is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID), meaning it works by inhibiting specific enzymes (COX-1 and COX-2) to reduce pain and inflammation throughout the body. Paracetamol (acetaminophen) also relieves pain and fever, but is known primarily for its analgesic (pain relief) and antipyretic properties, operating through a different mechanism.


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

A: Based on data from clinical sources, the analgesic effect has been described as having an onset within approximately 30 minutes after administration. The maximum pain relief from a single dose is usually noted to occur within 1 to 2 hours of use.


Q: What are the most commonly reported digestive side effects of Ketorolac EG?

A: According to official product information, the most frequently reported digestive side effects are common, occurring in 1% to 10% of patients. These common effects include abdominal pain (which may be mild), nausea, indigestion (dyspepsia), and diarrhea.


Q: Can Ketorolac EG be taken with other pain relievers like Tylenol?

A: Ketorolac is contraindicated, meaning it must not be used, with other Nonsteroidal Anti-inflammatory Drugs (NSAIDs) or aspirin due to a significantly increased risk of side effects. While official labeling does not list a specific contraindication with acetaminophen (Tylenol), the safety of combined use is typically evaluated by a healthcare provider.


Q: Does Ketorolac EG affect blood pressure readings?

A: Official product information lists hypertension (high blood pressure) as a common adverse reaction reported in clinical trials. Like other NSAIDs, Ketorolac EG is known to be associated with fluid retention and swelling (edema), which may sometimes be reflected in blood pressure.


Q: What is the typical time frame for pain relief after an injection of Ketorolac EG?

A: Following an injection (Intramuscular or Intravenous), the analgesic effect typically begins in approximately 30 minutes. The duration of significant pain relief from a single dose is usually described in clinical settings as being between 4 to 6 hours.


Q: What distinguishes Ketorolac EG from other non-steroidal anti-inflammatory drugs (NSAIDs)?

A: Ketorolac is formally identified as a potent NSAID analgesic in official documents. Its strict regulatory indication reserves it exclusively for the short-term (maximum 5 days total) management of moderately severe acute pain. This indication profile is distinct from the uses of NSAIDs that are indicated for minor or chronic painful conditions.


Q: Does Ketorolac EG cause drowsiness or affect alertness?

A: Drowsiness and dizziness are listed in official documents as common side effects, affecting between 1% to 10% of patients. Official warnings state that these effects may impair the ability to perform tasks requiring mental alertness, such as driving or operating machinery.


Q: Can Ketorolac EG be taken on an empty stomach?

A: Official information regarding the oral form states that taking the medicine with food can delay the rate of absorption of the drug into the body. However, food generally does not affect the total amount of the drug that is absorbed overall.


Q: What happens if I miss a scheduled time to take Ketorolac EG?

A: Regulatory-consistent patient guidance suggests avoiding dose doubling. Missed doses are typically handled by either taking the dose or skipping it if the next scheduled dose is near. In accordance with regulatory guidelines, dose doubling is typically avoided.


Q: Does Ketorolac EG have a known risk of dependence or addiction?

A: Ketorolac EG is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID) and is not an opioid. Official regulatory descriptions state that the medicine possesses no sedative or anxiolytic properties, which is consistent with its non-narcotic classification.


Q: Is Ketorolac EG a suitable treatment for long-term chronic pain?

A: No. Official product documentation states that this medicine is not indicated for the treatment of minor or chronic painful conditions. Its use is strictly limited by regulatory authorities to the short-term management of moderately severe acute pain. The total duration of systemic use is strictly limited to a maximum of five days.


Q: Are there different forms of Ketorolac EG, like a cream or gel?

A: The forms listed in official labeling for systemic administration of Ketorolac EG typically include tablets for continuation therapy, injection solutions for rapid relief, and a nasal spray. The existence of other systemic topical forms, such as creams or gels, is generally not listed for the systemic use of the drug.


Q: What are the signs that Ketorolac EG might be causing a reaction?

A: The official labeling describes signs of potentially serious reactions, which include swelling of the face, fingers, or lower legs; signs of internal bleeding such as severe stomach pain or black, tarry stools; unusual weight gain; or signs of serious heart issues like chest pain or shortness of breath.


Q: Can Ketorolac EG be used if I have asthma?

A: The medicine is contraindicated in patients who have experienced asthma, hives, or other allergic-type reactions after taking aspirin or other NSAIDs. For patients with pre-existing asthma without a known sensitivity to NSAIDs, caution is generally advised in the official information.


Q: Is there a maximum cumulative period for using Ketorolac EG over a lifetime?

A: Regulatory documents set a clear limit for a single course of therapy, stating the total combined duration across all systemic forms is strictly limited to five (5) days. Official product information, however, does not specify an official cumulative lifetime limit for the drug.


Q: Does Ketorolac EG affect liver enzyme levels?

A: Elevated liver enzymes (transient serum aminotransferase elevations) are reported in clinical trials. The occurrence of these elevations in patients taking NSAIDs, including this drug, has been reported in clinical trials. Severe hepatic reactions are rare.


Q: How long does Ketorolac EG stay in the system after the last use?

A: Pharmacokinetic data indicates that the active compound (ketorolac) has a mean plasma elimination half-life of approximately 5 to 6 hours in healthy adults. This half-life is the time it takes for the concentration of the medicine in the blood to be reduced by half.


Q: Are allergic reactions to Ketorolac EG common?

A: Severe hypersensitivity reactions, such as anaphylaxis or anaphylactoid reactions, have been reported from post-marketing experience with the drug. The official labeling describes these serious allergic reactions as rare.


Q: Can Ketorolac EG cause fluid retention or swelling?

A: Yes, edema (swelling) is listed as a common adverse reaction in official product information, affecting between 1% to 10% of patients. Like other Nonsteroidal Anti-inflammatory Drugs (NSAIDs), this medicine is known to be associated with fluid retention.


Q: Do patients need special monitoring while taking Ketorolac EG?

A: Official precautions advise monitoring for several potential issues during treatment. This includes watching for signs of gastrointestinal bleeding, regularly assessing renal (kidney) function, checking for signs of edema/hypertension, and monitoring for any signs of severe hypersensitivity reactions.


Q: Is Ketorolac EG used to reduce fever?

A: The medicine's mechanism of action gives it a modest antipyretic (fever-reducing) capability due to its role in inhibiting prostaglandin synthesis. However, its official and primary regulatory indication remains the short-term management of acute, moderately severe pain.


Q: Is Ketorolac EG used for headache or migraine treatment?

A: Official information mentions the drug's evaluation in clinical studies for conditions associated with acute, disruptive episodes, such as severe headaches or migraines in urgent care settings. The primary labeled indication remains acute, moderately severe pain.


Q: Why are people often told to take Ketorolac EG with food?

A: Patient instructions often suggest taking the oral tablet with food or an antacid. This practice is generally recommended to help lessen the risk of stomach upset (dyspepsia) or other gastrointestinal symptoms associated with NSAID use.


Q: Can Ketorolac EG cause problems with vision or hearing?

A: Abnormal vision, blurred vision, and hearing loss have been reported rarely or occasionally in patients taking this medicine or other NSAIDs in clinical trials, according to official labeling.

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How should Ketorolac EG be stored and disposed of?

How to Store and Dispose of Ketorolac Tromethamine

Ketorolac must be stored under controlled conditions to maintain its stability, as required by official regulatory labeling.

Storage Requirements

Condition Requirement
Temperature Store at Controlled Room Temperature (20 C to 25 C / 68 F to 77 F).
Protection Keep protected from light and excess moisture.
Container Must be kept in the original container with the lid tightly closed.
Freezing The injection solution must not be frozen.
Child Safety Store out of the sight and reach of children.

Disposal Instructions

Unused or expired ketorolac should be discarded according to established guidelines. The unused portion of a single-dose injection vial must be discarded immediately after use. Disposal should preferably be through authorized drug take-back programs. If a program is unavailable, mix the medicine with an undesirable substance, seal it, and place it in the household trash, following local regulations.

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

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