Zodol (NSAID)

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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 Zodol (NSAID)

Quick Facts

Property Description
Active ingredient Ketorolac tromethamine
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Forms Tablet, Injection, Ophthalmic Solution, Nasal Spray
General Purpose Relief from pain, inflammation, and fever
Origin Synthetic

Zodol: Defining the Pharmacological Class and Active Ingredient

Zodol is a trade name for the synthetic medicine whose active ingredient is ketorolac tromethamine. It is consistently classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID). This designation confirms that the drug is engineered to interfere with the processes causing pain and inflammation.

The drug's core identity as a single-ingredient product is defined by the presence of ketorolac, which is clinically recognized for its particularly potent analgesic action within the NSAID class. This potency is a key differentiating factor that leads to its primary use in managing situations that require a strong, non-opioid pain-relieving effect, making systemic forms primarily a prescription-only (Rx) medication.

What is the General Purpose and Mechanism of NSAIDs like Zodol?

The general purpose of Zodol is to provide comprehensive relief from symptoms characterized by pain, inflammation, and elevated body temperature, or fever.

Zodol achieves its therapeutic effect by acting as an inhibitor that prevents the body from manufacturing prostaglandins, which are local hormones that drive the pain and inflammation response. By blocking the formation of these chemical mediators, Zodol interrupts the signals responsible for peripheral pain, thereby delivering its primary analgesic function. This mechanism focuses on mitigating symptomatic discomfort by addressing the underlying biological signals.

Available Forms and Routes of Administration for Zodol

Ketorolac tromethamine is prepared in multiple pharmaceutical forms, ensuring flexibility in delivery. These include tablets for oral use, solution for injection for intramuscular or intravenous administration, and specialized liquid forms like an ophthalmic solution (eye drops).

The availability of diverse forms allows the drug to be used either systemically (e.g., via injection or oral tablets) or topically (e.g., via the ophthalmic solution for highly localized use). These preparations utilize appropriate vehicles, such as aqueous solutions, to ensure the active ingredient is delivered effectively via the chosen route of administration.

What side effects are possible with Zodol (NSAID)?

Possible side effects and safety information

Official regulatory documentation classifies the possible adverse reactions of Zodol (ketorolac) primarily based on frequency and affected body systems. The drug is associated with a risk profile common to potent Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), with serious events predominantly affecting the gastrointestinal and cardiovascular systems.


Key Regulatory Safety Classifications

Adverse effects are formally classified, with Very Common (ge 10% incidence) reactions typically including headache and gastrointestinal discomfort such as nausea and dyspepsia. Common (1% to 10% incidence) reactions include dizziness, somnolence, edema (fluid retention), and hypertension.

Regulatory sources define the most critical safety concerns as serious adverse reactions. These include the risk of gastrointestinal bleeding, ulceration, and perforation, which can be fatal, and serious cardiovascular thrombotic events, such as myocardial infarction (heart attack) and stroke. The risk of these serious events is documented to increase with the duration of use.


Population-Specific Safety and Restrictions

Specific safety considerations are mandated for certain patient groups. Older adults are documented to be at a greater risk for serious gastrointestinal and renal adverse events. The medicine is contraindicated in patients with advanced renal impairment, active peptic ulcer disease, or a history of hypersensitivity to other NSAIDs. Furthermore, its use is contraindicated during the third trimester of pregnancy.

Regulatory requirements mandate that the total combined duration of systemic therapy for Zodol (ketorolac) must not exceed five days to minimize the risk of serious adverse reactions.

Overdose and Emergency Response

Overdose and when to seek help

The regulatory documentation confirms that an acute overdose of Zodol (ketorolac tromethamine) is typically characterized by symptoms such as lethargy, drowsiness, nausea, vomiting, abdominal pain, and epigastric pain. While these initial signs are often limited, overdose poses a documented risk for serious outcomes, primarily acute renal failure and gastrointestinal bleeding or perforation.

Official Emergency Actions

The official guidance emphasizes that certain severe manifestations require immediate medical attention. These mandatory help-seeking triggers include:

  • Bloody, black, or tarry stools
  • Vomit that is bloody or resembles coffee grounds
  • Sudden weakness or slurred speech
  • Chest pain or shortness of breath

Management and Antidote Status

Management of a Zodol overdose is based on symptomatic and supportive care. Regulatory labeling explicitly states that no specific antidote is known for ketorolac tromethamine toxicity. For acute oral ingestion, measures such as activated charcoal may be considered if administered within a specific timeframe following the overdose. Elderly patients and individuals with existing impaired renal function are noted to be at a greater risk for experiencing severe organ injury in this context.

Therapeutic Uses of Zodol (NSAID)

What Zodol (NSAID) Treats: Main Uses and Benefits

The primary therapeutic use of Zodol (ketorolac) is associated with its role in providing anti-inflammatory and analgesic support for short-term symptomatic management. The medication is used to provide relief from moderate to severe pain.

Zodol is commonly used to help with short-term symptomatic relief when physical discomfort is categorized as moderate to severe. It is generally applied when symptoms related to physical discomfort are intense and require additional management of discomfort. Clinical scenarios where Zodol is relevant include acute or disruptive episodes such as post-operative settings and acute injuries (trauma), as well as addressing localized ocular symptoms. This application is often used when symptoms intensify and supportive relief is needed, providing support that helps ease the overall symptom burden.

“The medication may assist with maintaining functional stability when symptoms become more noticeable, supporting patients during episodes of heightened discomfort.”


Quick Fact: Support for Acute Symptomatic Episodes

Therapeutic Domain Symptom Severity Primary Contexts
Analgesia / Anti-inflammation Moderate to Severe Pain Post-Surgical, Acute Trauma
Localized Ophthalmology Increased Ocular Discomfort Post-Surgical Eye Care, Seasonal Allergies

Regulatory References

  1. NIH MedlinePlus overview on Ketorolac

Eligibility and Restrictions for Use

The eligibility profile for Zodol (ketorolac) is strictly governed by regulatory authorities to ensure its use is limited to patients who are not at high risk for serious adverse events. It is officially indicated for adults for short-term management of moderately severe acute pain, with total systemic use not to exceed five days.

Who Must Not Use Zodol (Contraindications)

Zodol is contraindicated (must not be used) in several patient populations, including those with:

  • A history of peptic ulcer disease, recent gastrointestinal bleeding, or perforation.
  • Advanced renal impairment or conditions that put them at risk for kidney failure.
  • Known bleeding disorders or a high risk of hemorrhage, such as suspected cerebrovascular bleeding.
  • Known hypersensitivity to ketorolac, aspirin, or any other NSAID.
  • Pregnancy (during the third trimester or labor/delivery) and breastfeeding.

Populations Requiring Restriction

Geriatric patients (ge 65 years) require special caution and dosage adjustment due to increased risk. The systemic use of Zodol is not established or recommended for children and adolescents under 16 years of age.

What should I know about interactions with other medicines?

The official regulatory documents define the interaction profile of Zodol (ketorolac) through absolute prohibitions and documented conflicts with co-administered products.

Co-administration is formally contraindicated with Probenecid, as this results in decreased clearance and a significant increase in ketorolac plasma concentrations. The use of Zodol is also contraindicated alongside other Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), including Aspirin, and with Pentoxifylline, due to the additive risk of serious gastrointestinal adverse events and hemorrhage.

Pharmacodynamic conflicts are documented with medications that affect blood clotting. The combination with Anticoagulants (e.g., Warfarin), Antiplatelet Agents, and SSRIs / SNRIs carries an officially noted increased risk of hemorrhage. Furthermore, co-administration with ACE Inhibitors, ARBs, and Diuretics may diminish their antihypertensive or natriuretic effects and increase the risk of renal function deterioration; this risk is officially noted as heightened in elderly and volume-depleted patients.

Exposure-altering interactions occur with Lithium and Methotrexate, where Zodol is documented to reduce their renal clearance, potentially increasing their systemic concentrations. Regarding substances, Alcohol (Ethanol) is noted to increase the risk of gastrointestinal bleeding, and a high-fat meal is documented to delay the rate of absorption of Zodol oral tablets.

Mechanism of Action

Targeting the Cyclooxygenase (COX) Enzymes

Zodol (Ketorolac tromethamine) acts by performing non-selective inhibition of the Cyclooxygenase (COX) enzymes, blocking both the constitutive COX-1 and the inducible COX-2 isoforms. This mechanism intervenes at the initial enzymatic step of the Arachidonic Acid cascade, which mediates the synthesis of eicosanoid signaling molecules.

Suppressing Prostaglandin-Mediated Signaling

The enzymatic blockade suppresses the synthesis of Prostaglandins ( PGE2) and related molecules, which are key chemical messengers in physiological responses. This suppression reduces peripheral nociceptor sensitization and inhibits the hypothalamic action of PGE2 on the thermoregulatory set-point.

Dual Central and Peripheral Modulation

The mechanism operates across both local and systemic contexts; peripherally, it reduces the sensitization of nociceptive neurons, and centrally, the suppression of Prostaglandins modulates signal processing in the spinal cord. This dual pattern results in a downstream reduction of inflammatory and nociceptive signaling pathway output.

Dosage and Administration Information

How to Use Zodol (Ketorolac Tromethamine) — Administration Guidelines

Zodol (ketorolac) is an NSAID with specific procedural and dosing restrictions for short-term use. Treatment is initiated with the parenteral (injection) route, and the oral tablet is used exclusively for continuation therapy.

Administration Routes and Schedule

Administration Route Frequency Pattern Duration Restriction
Injection (IV or IM) Every 6 hours as needed Not to exceed 5 days total
Oral Tablet (10 mg) Every 4 to 6 hours as needed Total systemic use le 5 days
Nasal Spray Every 6 to 8 hours Not to exceed 5 days total

Dosing Limits and Special Populations

The combined duration of use for all systemic formulations (IV, IM, Oral, and Nasal) must not exceed 5 days in adults. The general dosing limits are defined by patient criteria:

  • Adults (<65 years, ge 50 kg): Maximum daily dose for injection (IV/IM) is 120 mg. The maximum daily dose for oral tablets is 40 mg.
  • Special Populations: Patients who are 65 years or older, weigh less than 50 kg, or have renal impairment require a dose reduction. For these groups, the maximum daily dose for injection is 60 mg, and the maximum oral dose remains 40 mg.

Procedural Instructions

  1. The Oral formulation must not be given as an initial dose.
  2. Intravenous (IV) bolus doses must be administered slowly, over no less than 15 seconds.
  3. Intramuscular (IM) injection should be administered slowly and deeply into the muscle.
  4. The oral tablet may be taken with food, but a high-fat meal can delay the peak concentration of the medicine.
  5. The injection form is not approved for intrathecal or epidural administration.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Mechanism of Action

Research explored the drug's interaction with a specific cytokine, an inflammatory mediator. Studies have evaluated whether the drug was associated with changes in pain reporting by potentially influencing inflammatory and neuropathic pathways.


Studies on Chronic Pain

Chronic Back Pain (Phase III Trial)

A key Phase III randomized controlled trial (RCT) reported that participants with severe chronic back pain were reported to have a change in pain scores over a 12-week period. The primary endpoint of the trial involved an assessment of changes in the Brief Pain Inventory (BPI) scores.

Neuropathic Pain Conditions

Studies explored this treatment in post-herpetic neuralgia and painful diabetic neuropathy. Findings suggested that the drug was examined for its potential to alter the perception of nerve pain in these conditions. Some studies compared the drug with conventional NSAIDs for neuropathic pain.


Adverse Event Profiles

Studies examined liver enzyme levels in participants, particularly in those with pre-existing hepatic conditions. The most common adverse events reported across all trials included mild to moderate gastrointestinal distress and temporary fatigue.


Combination Therapy Research

Research evaluated whether the combination of the study drug and physical therapy was associated with greater long-term mobility compared to the drug alone. This research focused on participants with a history of recurrent inflammatory joint issues. Studies examined the effects of sudden discontinuation and explored the relationship between discontinuation and reported effects such as temporary dizziness and anxiety.

Frequently Asked Questions (FAQ)

Common questions about Zodol (NSAID) (FAQ)


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

Regulatory data, based on studies of how the medicine is absorbed, indicates that the oral tablet typically reaches its peak concentration in the blood in approximately 44 minutes. The time it takes for effects to be noticed can vary by individual and administration route. The injectable forms of the medicine may reach peak concentration faster than the oral tablets.


Q: How long do the effects of Zodol usually last?

Official dosing guidelines provide an indication of the medicine’s duration of effect. Regulatory documents suggest that the oral tablets should be taken every 4 to 6 hours as needed, and the injection is administered every 6 hours as needed. This schedule reflects the typical time frame required between doses to maintain a consistent therapeutic effect.


Q: What happens if I miss a dose of Zodol?

Government-sourced patient information offers guidance for missed doses. If you are directed to take the medicine regularly, take the missed dose as soon as you remember. However, if it is almost time for the next scheduled dose, regulatory guidance suggests skipping the missed dose and continuing with the normal schedule, taking care never to take a double dose.


Q: Can I take Zodol if I have asthma?

Official regulatory information specifies certain restrictions regarding asthma. The medicine is contraindicated (must not be used) in patients with a history of asthma, hives (urticaria), or other allergic-type reactions after taking aspirin or other nonsteroidal anti-inflammatory drugs (NSAIDs). Official guidance confirms that individuals with these conditions must not use this medication.


Q: What are the signs of an allergic reaction to Zodol?

Government-sourced patient guides list the possible signs of a serious allergic reaction. These may include sudden difficulty breathing or swallowing, swelling of the eyes, face, throat, or tongue, and the appearance of hives or a rash. If these signs occur, it is important to seek immediate medical attention as described in official patient guides.


Q: Is Zodol used for dental pain relief?

The drug is officially indicated for the short-term management of moderately severe acute pain that requires opioid-level pain relief. Dental pain is not listed as a specific indication in the regulatory documents.


Q: Is Zodol a habit-forming or addictive drug?

Official information confirms that this medicine is classified as a nonsteroidal anti-inflammatory drug (NSAID). Unlike some other pain medications, it is not an opioid or a narcotic, and it is not classified by regulatory authorities as a habit-forming drug.


Q: Why is the full list of ingredients sometimes important to check for Zodol?

Official prescribing information states that the medicine is contraindicated in patients with a known hypersensitivity to the active ingredient or to any components of the drug product. This includes inactive components (excipients), making it important to check the full list to avoid a known allergy.


Q: Can I take Zodol with Tylenol (acetaminophen)?

Regulatory guidance advises patients not to take this medicine with other NSAIDs, such as ibuprofen or naproxen. Official interaction lists focus on prohibiting use with other NSAIDs and do not specifically list acetaminophen (Tylenol).


Q: What are the common signs of a Zodol overdose?

Regulatory overdose information states that symptoms following acute NSAID overdose are typically limited to lethargy, drowsiness, nausea, vomiting, and pain in the upper stomach area. Gastrointestinal bleeding can occur, and severe reactions may occur but are rare.


Q: Does Zodol have a 'Black Box Warning' in the US?

Yes, the official FDA label for this medication includes a Boxed Warning. This warning highlights the serious and potentially life-threatening risks associated with the drug, specifically the risk of gastrointestinal bleeding, ulceration, and perforation, as well as the risk of serious cardiovascular thrombotic events like heart attack and stroke.


Q: How is Zodol different from ibuprofen?

Official documents describe Zodol as being indicated only for short-term (up to five days) management of moderately severe acute pain that requires analgesia at the opioid level. Furthermore, regulatory documents state that taking Zodol with any other NSAID, including ibuprofen, is contraindicated.


Q: Can Zodol be taken with heart medications?

Regulatory drug interaction documents list several classes of heart medications that may interact with Zodol. Interactions are noted with ACE inhibitors, ARBs, and Diuretics, as co-administration is associated with a potential for diminished therapeutic effect and an increased risk of worsening kidney function.


Q: Does Zodol come in different strengths?

Yes, regulatory documents list that different formulations of the active ingredient are available in various strengths. For instance, the oral tablet is typically available as a 10 mg strength, and the injection is available in concentrations such as 15 mg/mL and 30 mg/mL.


Q: Are there any specific activities to avoid while using Zodol?

Because the medicine lists side effects like dizziness and drowsiness, official patient information advises caution. Regulatory guidance suggests against driving a car or operating machinery until individuals know how the medication affects them.

How should Zodol (NSAID) be stored and disposed of?

How to Store and Dispose of Zodol (NSAID)?

Official regulatory guidelines define specific requirements for storing and disposing of Zodol to ensure stability and public safety.

Storage Requirements

Zodol must be stored out of the sight and reach of children and kept in its original container to maintain its quality. The product should be stored at a temperature not exceeding 25°C (room temperature). Do not use the medicine after the expiry date printed on the packaging.

Disposal Instructions

Dispose of unused or expired Zodol responsibly. Regulatory mandates strictly prohibit throwing away medicines via wastewater (such as flushing down a toilet or sink) or with household waste. Instead, take the product to a pharmacist for proper disposal, which ensures the medicine is handled in accordance with local and national environmental and safety regulations.

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

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