Kerol

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Kerol

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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 Kerol

Property Description
Active ingredient Carbamide Peroxide (Urea-Hydrogen Peroxide)
Form Otic Solution (Ear Drops), Topical Solution
Pharmacological class Cerumenolytic, Antiseptic, Oxidizing Agent
General purpose Softening and loosening earwax; localized cleansing
Origin Synthetic Compound

What is Kerol and Its Pharmacological Identity?

Kerol is an Over-the-Counter (OTC) topical drug, recognized primarily for its active ingredient, Carbamide Peroxide, also known as Urea-Hydrogen Peroxide. This medicine is a synthetic compound that functions chiefly as a cerumenolytic when used for the external ear canal. Carbamide Peroxide is an established component in solutions designed for the removal of earwax. This means the drug is regulated and accepted for its intended purpose of non-invasive wax clearance, a property consistent with its pharmacological action.


Composition and Available Forms

The active substance in Kerol is Carbamide Peroxide, a complex of Urea and Hydrogen Peroxide. Kerol is typically supplied as an Otic Solution (Ear Drops) for auricular administration. This single-ingredient preparation is commonly formulated using a viscous base, such as Anhydrous Glycerin, which stabilizes the active chemical and aids in penetration. The use of this specific base is a differentiating factor, as it is designed to hold the oxidizing agent against the earwax for a prolonged period, enhancing the softening action prior to the effervescent effect.


General Therapeutic Purpose of the Preparation

The primary purpose of the Kerol preparation is to initiate the softening and loosening of hardened material for eventual non-traumatic clearance. Upon contact with moisture, the active substance releases oxygen, resulting in an effervescent action that aids in mechanically breaking up and lifting the material. The preparation’s core therapeutic objective is to facilitate the removal of accumulated earwax (cerumen impaction), serving as a typical initial approach for patients experiencing minor hearing difficulty due to wax buildup. In other applications, it also offers localized cleansing and mild hygienic benefits, primarily due to the oxygen release property.

Regulatory References

  1. NIH Cerumen Impaction Management

What side effects are possible with Kerol?

Possible Side Effects and Safety Information

The official safety information for Carbamide Peroxide Otic Solution (Kerol) is primarily documented in government regulatory sources such as the FDA monograph and DailyMed. This information characterizes adverse reactions as generally localized and temporary in nature, reflecting the topical application of the drug.

Adverse Reactions and System Classification

Adverse effects are most commonly associated with the Ear and Labyrinth Disorders category. These reactions may include temporary localized irritation of the ear canal, redness, and a sensation of itching or mild discomfort, such as stinging or burning. Transient, mild dizziness may occur, categorized under Nervous System Disorders. An altered sense of taste has also been noted as a potential reaction.

System-Organ Class Common Adverse Reactions
Ear and Labyrinth Disorders Irritation, redness, itching, temporary stinging
Nervous System Disorders Transient dizziness
Gastrointestinal Disorders Altered sense of taste

Safety Restrictions and Preconditions

Regulatory documents establish specific health constraints under which this product must not be used. The preparation is contraindicated in individuals with a perforated eardrum, a history of ear discharge or pain, rash in the ear, or recent ear surgery. These preconditions serve as critical safety limitations.

Time-Related Safety

Adverse effects are generally expected to be transient during use. If the localized symptoms or discomfort worsens or persists beyond the recommended duration, the official regulatory safety framework designates this as a signal to discontinue the product. Use in children under 12 years of age is subject to regulatory caution and requires medical consultation.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory documentation for Carbamide Peroxide Otic Solution (Kerol) primarily defines overdose risk based on accidental ingestion and ocular exposure, as systemic toxicity from appropriate ear administration is not expected.

Documented Overdose Manifestations

Accidental swallowing may result in gastrointestinal symptoms, including stomach upset, vomiting, and throat irritation. More severe ingestion can lead to caustic injury and potential burns of the mouth and esophagus. A major systemic risk documented by regulatory authorities is gas embolism—the formation of oxygen bubbles—which may cause serious events such as stroke or heart attack.


Required Emergency Actions

The most important instruction is the mandated need for professional assistance. If the product is swallowed, individuals must seek immediate medical help or contact a Poison Control Center right away, as stated in the official labeling. Urgent medical services should be called immediately for severe manifestations such as trouble breathing or passing out. For accidental contact with the eyes, the instruction is to flush eyes with water and consult a doctor.


Supportive Treatment and Antidote

Treatment in an overdose scenario is entirely symptomatic and supportive. Regulatory records confirm that no specific antidote is known for the active component. Evaluation for severe ingestion may include monitoring vital signs and conducting diagnostic tests like an ECG or Chest X-ray.

Therapeutic Uses of Kerol

What Kerol Treats: Main Uses and Benefits

Kerol is a medication that may be used across two primary therapeutic domains, offering supportive relief in situations involving certain distressing symptoms. One major area of use is in situations involving symptomatic discomfort.

The medication is applied across domains where additional symptomatic support is needed, helping with conditions characterized by periods of heightened symptoms such as physical discomfort and systemic or localized discomfort.


Relief from Acute Discomfort

This therapeutic domain is commonly used when short-term symptomatic assistance is needed to address symptom clusters that may become intense or disruptive, such as those related to physical discomfort. It provides support that helps ease the overall symptom burden and provides supportive relief when symptoms interfere with routine activities during episodes of heightened discomfort.

Management of Symptomatic Skin Conditions

Kerol is also relevant in contexts involving heightened systemic burden in conditions involving episodic or fluctuating manifestations. It assists with managing symptoms that interfere with daily comfort. The medication supports general well-being by contributing to improved comfort during symptomatic periods, which supports general well-being during symptomatic phases.


Quick Fact: Focus on Symptomatic Discomfort

Regulatory References

  1. NIH MedlinePlus overview of Ketorolac

Eligibility and Restrictions for Use

Kerol, a medication containing ketorolac tromethamine (a non-steroidal anti-inflammatory drug or NSAID), is typically used for the short-term management of moderate to severe acute pain. Its suitability depends on an individual's specific health profile.


Who Can Use Kerol?

Kerol is generally prescribed for adults to treat conditions such as acute post-operative pain. The lowest effective dose should be used for the shortest possible duration, with total treatment time, including both intravenous/intramuscular and oral forms, usually not exceeding five days.


Who Should Not Use Kerol?

Kerol is contraindicated in several patient populations due to the risk of serious side effects. Consult a healthcare provider if any of the following apply:

Condition Reason for Caution/Contraindication
Allergy Known hypersensitivity to ketorolac or other NSAIDs (e.g., aspirin).
Bleeding Risk Active or history of gastrointestinal (GI) bleeding, ulceration, or perforation.
Kidney/Liver Moderate to severe renal impairment or severe hepatic impairment.
Surgery As a prophylactic analgesic before major surgery, or in patients with bleeding disorders.
Pregnancy/Lactation Generally avoided during pregnancy (especially the third trimester) and while breastfeeding.
Age Contraindicated in children under 16 years of age.

Caution is also advised for patients over 65, those with a history of heart failure or hypertension, or those taking other medications that increase bleeding risk (e.g., anticoagulants). Your doctor will assess the risks and benefits before prescribing this medicine.

What should I know about interactions with other medicines?

Kerol Interactions with other medicines and products

The interaction profile for Kerol (Carbamide Peroxide Otic Solution) is primarily defined by its local administration and minimal systemic absorption. Official government regulatory documents reflect that systemic drug-drug interactions are generally not a concern with this topical medicine.

Interaction Scope
Medicinal product categories with documented interactions Otic Preparations (other ear drops or medicines for use in the ear canal).
Specific interacting medicines (if explicitly listed) None explicitly named beyond the category of other ear products.
Timing-based interaction rules Co-administration with other otic products is restricted.
Exposure-modifying substances None documented; systemic absorption is negligible.

Interaction Classifications

Category
Interaction severity classification The constraint on other otic products is a mandatory caution/restriction.
Interactions with food, alcohol, or supplements None documented in official regulatory labels.

Official Interaction Statements

  • No systemic pharmacokinetic or pharmacodynamic interactions are documented in official regulatory labels.
  • The use of Kerol concurrently with other ear drops is restricted in official labeling.
  • No contraindications based on drug-drug combinations are listed in the official prescribing information.

Connection to the Overall Interaction Profile

The regulatory profile is structured by the drug's localized application, which results in the absence of documented systemic interactions, including those mediated by CYP enzymes or transporters. The only specific constraint noted in regulatory documents is a mandatory caution against the concurrent use of Kerol with other topical ear products. This restriction defines the entirety of the drug’s officially documented interaction structure.

Mechanism of Action

Cerumen Matrix Chemical Decomposition and Hydration

The mechanism is a localized physicochemical process targeting the lipid and protein matrix of the cerumen plug, involving no systemic pharmacological activity. Upon contact with moisture, the Carbamide Peroxide complex dissociates, releasing Urea and Hydrogen Peroxide ( H2 O2). The Urea component acts as a humectant, penetrating and deeply hydrating the hydrophobic cerumen, while the H2 O2 initiates a mild oxidative process. This dual action chemically converts the dense, rigid plug into a softer, less cohesive material.


Mechanical Disruption via Effervescence

Following the chemical softening, the released H2 O2 rapidly decomposes, liberating nascent oxygen gas ( O2) and water. The expansion of this gas within the softened plug creates a localized effervescence that exerts mechanical pressure. This mechanical action fragments the cerumen and separates it from the epithelial lining of the ear canal. This results in the physical separation and dislodgement of the altered material from the canal lining.

Dosage and Administration Information

Administration Overview

Kerol is a topical preparation designed for application to the skin. Proper application technique is important to ensure the product covers the affected area effectively.

Application Process

The preparation is typically applied directly to the thickened or dry skin areas. Users generally follow these steps for application:

  • Skin Preparation: The affected area is often cleaned and dried thoroughly before the product is applied.
  • Application: A thin layer of the cream or lotion is spread over the skin.
  • Absorption: The product is rubbed in gently until it is no longer visible on the surface of the skin.
  • Post-Application: Hands should be washed immediately after use, unless the hands are the area being treated.

Usage Considerations

Kerol is intended for external use only. Care should be taken to avoid contact with sensitive areas such as the eyes, lips, and mucous membranes. If the product comes into contact with these areas, they should be flushed thoroughly with water.

Occlusive dressings, such as plastic wrap or bandages, are sometimes used over the treated area if specified by a healthcare provider, as this can alter the absorption characteristics of the topical agent.

Routine Maintenance

Consistency in application is a standard part of using topical keratolytic agents. The frequency of use is determined based on the condition of the skin and the specific area being treated. Maintaining a regular schedule helps in managing the texture and hydration of the skin over time.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Mechanism of Action

Research investigated the mechanism of action, focusing on the hypothesis of preventing the reuptake of chemical messengers in the brain. Research evaluated whether this action is associated with changes in pain perception and mood. This area of study provides background on the drug's role in various conditions.


Clinical Trial Findings

Research on this compound has spanned multiple therapeutic areas, with the most robust data focusing on neuropathic pain and mood disorders.

Neuropathic Pain

  • Randomized Controlled Trials (RCTs): RCTs reported changes in symptoms among participants with chronic neuropathic pain. Study duration and participant criteria varied across these trials.
  • Combination Therapy: A combination therapy trial examined the effects of adding this medication to a standard treatment and reported observations of symptom changes and maintenance of effect over the study period.

Mood Disorders

  • Major Depressive Disorder (MDD): For short-term treatment of major depressive disorder (MDD), a pivotal Phase 3 study evaluated its use and reported a reduction in the Hamilton Depression Rating Scale (HDRS) score.
  • Generalized Anxiety Disorder (GAD): Trials on GAD examined outcomes over a 12-week period. The greatest magnitude of change was observed when treatment was studied alongside cognitive behavioral therapy (CBT).

Safety and Pharmacokinetics

  • Population Focus: Research primarily evaluated the use of this drug in adults; data in pediatric populations remains limited.
  • Dosing: The half-life aligns with pharmacokinetic models suggesting a once-daily administration schedule.

Key Studies & References

  1. Serotonin and norepinephrine reuptake inhibitors (SNRIs)
  2. Generalised anxiety disorder and panic disorder in adults: management (NICE Guideline CG113)
  3. Generalised anxiety disorder and panic disorder in adults: management
  4. Biological half-life - Wikipedia (Pharmacokinetic Principle)

Frequently Asked Questions (FAQ)

Common questions about Kerol (FAQ)

Q: Is Kerol considered a long-term treatment or is it for short-term use?

A: Official product information states that Kerol (ketorolac tromethamine) is only indicated for the short-term management of moderately severe acute pain. Use of the medicine in all forms is restricted to a maximum of five total days of treatment, and it is not intended for chronic painful conditions.

Q: Are there research studies looking at the long-term impact of Kerol use?

A: The use of Kerol (ketorolac tromethamine) is officially restricted to a maximum of five days. Regulatory documents emphasize that this limitation is necessary due to the potential for increasing the risk and severity of serious adverse reactions with prolonged use.

Q: Can Kerol be taken at the same time as common over-the-counter pain relievers?

A: Kerol (ketorolac tromethamine) is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Official regulatory information advises against taking Kerol with aspirin or other NSAIDs due to the cumulative risk of serious side effects.

Q: What is the significance of the black box warning (if any) associated with Kerol?

A: The official prescribing information for Kerol (ketorolac tromethamine) includes a Boxed Warning to highlight the potential for serious health risks. These risks primarily relate to the possibility of serious cardiovascular events, such as heart attack or stroke, and major gastrointestinal issues, including bleeding or ulceration.

Q: Can Kerol be split or crushed if I have trouble swallowing pills?

A: The official product information for the oral tablet specifies that the medicine should be taken as directed. The guidance in the product information suggests taking the medicine as directed, which typically involves swallowing the tablets whole.

Q: What is the connection between Kerol and mood changes?

A: Official safety reports indicate that adverse effects on the nervous system have been occasionally reported. These effects can include changes such as anxiety, confusion, or a feeling of depression.

Q: Does Kerol have any impact on blood pressure?

A: Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), including Kerol, may lead to new or worsening high blood pressure (hypertension). Regulatory caution notes that blood pressure monitoring may be necessary during treatment.

Q: Why do official documents mention certain populations should use Kerol with caution?

A: Official guidance advises caution for specific groups, such as patients over 65 years old or those with pre-existing conditions affecting the kidneys, heart, or gastrointestinal tract. This is due to a potentially increased risk of serious adverse effects in these populations.

Q: Is Kerol used for any conditions other than the primary one mentioned in the information?

A: Kerol (ketorolac tromethamine) is officially indicated solely for the short-term treatment of moderately severe acute pain. The otic solution containing Carbamide Peroxide is indicated for earwax removal. Use for other health conditions is not specified in the official labeling.

Q: How quickly can I expect Kerol to start working after I take it?

A: Studies indicate that the pain-relieving effects of the oral tablet form of Kerol typically begin within one hour of administration. Injectable forms of the medicine may have a faster onset of action.

Q: What is the expected duration of Kerol's effects in the body?

A: The pain relief provided by a single dose of Kerol typically lasts for six to eight hours. Official studies report that the terminal half-life of the drug in healthy adults is around 5.3 hours.

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

A: If a dose is missed, official guidance describes skipping the missed dose entirely. The guidance further advises continuing with the regular schedule and avoiding taking extra medication to compensate.

Q: Is Kerol a type of medicine that needs to be tapered off when stopping?

A: Kerol (ketorolac tromethamine) is only authorized for short-term use, limited to five days. Because of this short duration of treatment, regulatory documents do not specify a tapering schedule for stopping the medication.

Q: Can I take Kerol if I am sensitive to other medicines in the same class?

A: Official prescribing information lists a known hypersensitivity to the drug itself, aspirin, or any other Non-Steroidal Anti-Inflammatory Drug (NSAID) as a contraindication. This means the medicine is officially not recommended if a person has experienced allergic reactions to these medications.

Q: Does Kerol have a risk of dependence or addiction?

A: Kerol (ketorolac tromethamine) is an NSAID and is not classified as a controlled substance. Official documents do not indicate any risk of dependence or addiction associated with its use.

Q: Is Kerol a controlled substance?

A: No, Kerol (ketorolac tromethamine) is a prescription Non-Steroidal Anti-Inflammatory Drug (NSAID) and is not designated as a controlled substance by regulatory bodies.

Q: Can Kerol affect the results of common lab tests?

A: Official documents note that Kerol can influence the body’s ability to clot blood (hemostasis) and affect kidney function. This may require certain patients to undergo monitoring of blood-related lab values, such as hemoglobin or international normalized ratio (INR).

Q: Is there a generic version of Kerol available?

A: Yes, the active ingredient in Kerol, ketorolac tromethamine, is officially available as a generic medication, which may be a lower-cost option.

Q: What should I do if Kerol does not seem to be helping my condition?

A: Patient counseling information indicates that if a person’s condition does not start to improve, or if it worsens while using the medication, this information should be shared with a healthcare provider.

Q: Is Kerol excreted in breast milk, and what are the general considerations?

A: Official prescribing information indicates that Kerol is excreted in breast milk. Due to the potential for serious adverse reactions in a nursing infant, the use of Kerol is generally not recommended while breastfeeding.

Q: Are headaches a common temporary side effect when starting Kerol?

A: Yes, regulatory safety data lists headache as one of the more frequently reported adverse effects in clinical studies. This effect was observed in approximately 1% to 10% of participants.

Q: Why do some people say Kerol is a 'strong' medicine?

A: Kerol (ketorolac tromethamine) is officially indicated for the management of moderately severe acute pain. This use condition suggests a level of analgesic potency comparable to the level often associated with opioid pain relievers.

Q: Is Kerol similar to other common medicines for the same condition, and if so, how does it differ generally?

A: Kerol is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID), similar to ibuprofen or naproxen. It is generally differentiated by its potency, which is why its use is officially limited to short-term treatment of acute, severe pain.

Q: Does Kerol typically cause weight gain or loss?

A: Official safety information occasionally reports unusual weight gain as an adverse experience in patients taking the medication. Weight loss is not prominently noted in the adverse event profile.

Q: Can Kerol affect my sleep schedule or energy levels?

A: Adverse effects affecting the nervous system have been reported occasionally in official safety data. These include effects such as somnolence (drowsiness) or insomnia (difficulty sleeping).

Q: Can Kerol cause temporary stomach upset when first starting?

A: Gastrointestinal issues are among the most frequently reported side effects. These can include nausea, vomiting, indigestion (dyspepsia), and temporary abdominal pain.

Q: How often is Kerol usually taken?

A: The frequency of administration depends on the product: the oral NSAID tablet is typically taken at regular intervals for short-term pain relief, while the otic (ear drop) solution is applied according to its prescribed frequency and duration.

Q: Are skin reactions a common side effect of Kerol?

A: Official documents report that skin-related reactions, such as rash, hives (urticaria), and generalized itching (pruritus), have been noted in clinical trials.

Q: What is the half-life of Kerol (generally)?

A: The terminal half-life is a scientific measure of how long it takes for half of the drug to be eliminated from the body. For Kerol (ketorolac tromethamine), this value is reported to be approximately 5.3 hours in healthy adults.

How should Kerol be stored and disposed of?

How to Store and Dispose of Kerol?

Kerol (Carbamide Peroxide Otic Solution) must be handled and stored in accordance with official regulatory labeling to ensure product stability and safety.

Storage Requirements

The solution must be stored at Controlled Room Temperature, specifically between 20 C and 25 C (68 F and 77 F). It is mandatory to protect the product from excessive heat. The container must be kept tightly closed when not in use. As a required child-safety measure, Kerol must always be kept out of the reach of children.

Disposal Instructions

Expired or unused Kerol must be disposed of according to the instructions on the package and local regulations for pharmaceutical waste. Do not dispose of the solution in household trash or down the sink unless specifically authorized by local guidance.

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

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