CLARO

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CLARO

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Medically reviewed

Laura Arias

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 CLARO

Property Description
Active Ingredients Florfenicol, Mometasone Furoate, Terbinafine Hydrochloride
Form Otic Solution
Pharmacological Class Topical Antibacterial, Antifungal, Corticosteroid
General Purpose Comprehensive control of ear infection causes and related inflammation
Origin Synthetic (all active components)

CLARO: Definition and Pharmacological Classification

CLARO is a prescription animal drug formulated as a synthetic, fixed combination product delivered as an Otic Solution, intended exclusively for auricular (otic) administration in the canine target audience. This medication is recognized for its triple-action approach, combining agents with antibacterial, antifungal, and potent corticosteroid (glucocorticoid) properties. The fixed combination composition is a key differentiating feature, designed to ensure that the primary issues underlying acute ear conditions—microbial infection and associated inflammation—are addressed simultaneously.


What Active Ingredients Are in CLARO?

The solution contains three distinct active ingredients: Florfenicol, Terbinafine Hydrochloride, and Mometasone Furoate. Florfenicol is the antibacterial component, classified chemically as a thiamphenicol derivative. Terbinafine Hydrochloride provides the potent antifungal action against common fungal organisms often identified in typical cases of external ear inflammation. Mometasone Furoate is the steroidal anti-inflammatory component, a potent synthetic glucocorticoid that works to suppress the local inflammatory response. The product utilizes an oil-based vehicle, a key differentiating factor that ensures enhanced contact time and sustained distribution of these three synthetic agents within the deep contours of the ear canal.


General Purpose and Triple-Action Benefit

The general purpose of CLARO is to provide a comprehensive strategy for managing the ear canal environment during periods of acute inflammation and infection. The triple-action benefit is achieved because the medicine simultaneously controls the infectious agents (both bacterial and fungal) and mitigates the body's inflammatory response. The Florfenicol component provides antibacterial action, which plays a role in stopping bacterial growth. By delivering an antibacterial, an antifungal, and an anti-inflammatory agent, the medication works to relieve irritation, swelling, and the production of excessive discharge, promoting an overall return to comfort and a healthy aural environment in the patient.

Regulatory References

  1. FDA Freedom of Information Summary: NADA 141-440 (CLARO)

What side effects are possible with CLARO?

Possible Side Effects and Safety Information

The medicine's safety profile is established through clinical trials and post-approval surveillance data collected by regulatory authorities, primarily the U.S. Food and Drug Administration (FDA).

Classification of Adverse Reactions

The most frequently reported adverse reactions are localized to the site of application. Based on regulatory data, the most reported events are ear discharge and head shaking. Less frequent, systemic effects such as vomiting and ataxia (loss of coordination) have also been documented in post-approval reports.

Adverse reactions are categorized across several physiological areas:

  • Ear and Labyrinth Disorders: Includes ear discharge, deafness (hearing loss), and vestibular signs (e.g., head tilt, nystagmus).
  • Endocrine Disorders: Concerns related to the systemic absorption of the potent corticosteroid component.
  • Nervous System Disorders: Includes ataxia and facial paralysis.

Serious Adverse Reactions and Safety Constraints

The regulatory label highlights several serious adverse reactions, which often relate to the potent corticosteroid and the application site:

  • Adrenocortical Suppression: The use of topical otic corticosteroids is associated with the potential for adrenocortical suppression and signs of iatrogenic hyperadrenocorticism, particularly with prolonged or repeated use.
  • Ototoxicity: Serious damage to the inner ear, including deafness, is a documented risk, emphasizing the importance of tympanic membrane integrity.
  • Perforated Tympanic Membrane: The medicine is contraindicated for use if a known or suspected perforation of the tympanic membrane is present due to the heightened risk of ototoxicity.
  • Population Safety: Safe use has not been evaluated in breeding, pregnant, or lactating animals. Caution is also advised for individuals with impaired hepatic function.

This framework ensures that potential risks are clearly communicated based on their relationship to both local application and systemic absorption.

Overdose and Emergency Response

Overdose and When to Seek Help

The officially documented overdose profile for CLARO is primarily defined by the risks associated with accidental exposure in humans, as the drug is formulated exclusively for veterinary use. Regulatory labeling identifies two main scenarios that require immediate action: accidental ingestion and accidental eye contact.


Documented Overdose Exposures and Required Actions

Accidental Ingestion by Humans

In the event of accidental ingestion by humans, regulatory guidance instructs the immediate contact of a physician. While specific systemic symptoms are not detailed in the public-facing overdosage summary, the requirement for immediate medical consultation highlights a potential systemic risk.

Accidental Contact with Eyes

Contact with the eyes poses a risk of eye injury and irritation. The procedural guidance for this exposure is to flush the affected eye copiously with water for at least fifteen minutes. Immediate medical help is required if eye irritation persists following this flushing procedure.


When to Seek Immediate Medical Help

Urgent medical attention must be sought in all cases of accidental ingestion by a human. Additionally, a physician should be contacted immediately if eye irritation or injury persists after performing the mandated fifteen-minute water flush. The product must be kept strictly out of the reach of children to prevent such accidental exposures.

Therapeutic Uses of CLARO

Combination therapies containing anti-infectives and anti-inflammatory agents are applied across domains where additional symptomatic support is needed. This therapeutic approach is relevant in conditions involving inflammatory or irritative processes.

CLARO is relevant for easing symptoms related to physical discomfort in the outer ear, such as acute pain, itching, and general irritation. It is applied in scenarios where additional management of discomfort is required, helping ease the overall symptom burden. It offers symptomatic relief, which may assist with easing distress during difficult episodes.

“It is commonly used across conditions presenting with acute episodes and offers symptomatic relief, which may assist with easing distress during difficult episodes.”

CLARO is applied in addressing symptom clusters that may become intense or disruptive, including redness, swelling (inflammation), abnormal discharge, and odor. CLARO contributes to easing the overall symptom load. This may support general well-being during symptomatic phases and assists with maintaining functional stability during symptomatic periods.

Quick Fact: Relief for Acute Symptoms CLARO is generally applied when symptoms become more noticeable, offering supportive relief for conditions involving inflammatory or irritative states in the external ear.

Regulatory References

  1. NIH MedlinePlus overview of combination ear drops

Eligibility and Restrictions for Use

Who Can and Cannot Use CLARO?

This section outlines the official population eligibility and non-eligibility rules for the prescription veterinary drug CLARO Otic Solution, as documented in governmental regulatory labeling.

Contraindications and Prohibitions

CLARO is strictly contraindicated in several specific populations, as defined by regulatory authorities.

  • Hypersensitivity: Dogs with a known or suspected allergy to Florfenicol, Terbinafine Hydrochloride, Mometasone Furoate, or any other component must not use this medicine.
  • Tympanic Membrane: Use is prohibited in dogs with a known or suspected perforation of the eardrum.
  • Species: The product is not for use in humans and is not approved for use in cats.

Use Restrictions and Cautions

Use of CLARO requires specific caution or is not established in certain groups:

  • Age: Safety has not been established in dogs less than three months of age or those under 4 kg bodyweight.
  • Organ Function: Use with caution is advised for dogs diagnosed with impaired hepatic (liver) function or suspected endocrine disorders.
  • Reproductive Status: Safe use has not been evaluated in dogs intended for breeding purposes, or in pregnant or lactating bitches. Some regulatory labels advise do not use during these periods.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for CLARO (florfenicol, mometasone furoate, terbinafine hydrochloride otic solution) is highly constrained and confirms that no formal interactions with other medicinal products have been documented across regulatory filings. The focus of the regulatory statements is instead placed on compatibility with non-drug substances and population-specific considerations for drug clearance.

Interaction Scope

Property Official Regulatory Documentation Status
Medicinal Product Interactions None documented.
Mechanistic Basis Not applicable; no external drug–drug or metabolic interactions are known.
Timing-based Restriction Compatibility with ear cleaners, other than saline solution, has not been demonstrated.
Population-specific Caution Caution is formally advised for use in individuals with impaired hepatic function.

Interaction Classifications (Regulatory Basis)

Property Official Regulatory Documentation Status
Severity Classification No combinations are classified as contraindicated or severe, as no external drug–drug interactions are known.
Interaction-Context Constraints Restriction applies to the co-administration of non-saline ear cleaners due to lack of demonstrated compatibility in testing.

Resulting Interaction Structure

Official interaction statements:

  • No specific drug–drug interactions with other prescription or non-prescription medicines are documented in the official regulatory prescribing information.
  • Compatibility studies have not demonstrated assurance for co-administration with ear cleaners other than saline solution.
  • A formal caution exists regarding use in individuals with impaired hepatic function, which reflects a population-specific consideration for potential alteration in systemic drug clearance.

Connection to the overall interaction profile:

The regulatory profile is characterized by the explicit absence of known interactions with other medicinal products. The profile outlines constraints regarding the co-administration of non-medicinal products, specifically citing the restriction related to non-saline ear cleaners. This structure emphasizes label-based restrictions concerning preparation products and notes a specific population-based risk for altered systemic exposure.

Mechanism of Action

CLARO is a fixed-combination otic solution consisting of three active pharmacological agents: florfenicol, terbinafine, and mometasone furoate. Florfenicol acts as a bacteriostatic antibiotic, inhibiting microbial protein synthesis via irreversible binding to the 50S subunit of the bacterial ribosome. Terbinafine is an antifungal agent from the allylamine class; it selectively interacts with and inhibits squalene epoxidase, a key enzyme in the fungal ergosterol synthesis pathway, resulting in fungicidal activity. Mometasone furoate is a synthetic glucocorticosteroid with potent anti-inflammatory activity. It binds to intracellular glucocorticoid receptors, modulating gene transcription to suppress the synthesis and release of pro-inflammatory mediators. This concurrent modulation of bacterial replication, fungal proliferation, and inflammatory signaling in the external ear canal culminates in a system-level physiological response characterized by sustained reduction of localized micro-organism load and attenuation of inflammation-driven cellular exudation.

Dosage and Administration Information

How CLARO is Used

The usage protocol for CLARO is defined as a fixed-dose, single-administration regimen. The medication is formulated as an Otic Solution, intended for auricular (ear) administration in the canine target audience.

Administration Protocol and Dosing

The administration of this medicine is required to be performed solely by veterinary personnel. The regimen consists of a single dose delivered from one pre-filled dropperette, equivalent to 1 mL of solution, into the affected ear(s). This fixed 1 mL dose applies to dogs of all sizes and constitutes the entirety of the treatment course; no subsequent daily or at-home dosing is prescribed.

Procedural Conditions

Before the solution is instilled, the integrity of the tympanic membrane must be confirmed by the veterinary professional as a mandatory prerequisite for proper use. The ear canal must also be cleaned and dried before the single dose is administered. Following the instillation of the full 1 mL content, the base of the ear should be gently massaged to ensure appropriate distribution of the solution throughout the canal. The treatment is designed to confer an effect lasting 30 days following the single professional application. Users are instructed that cleaning the ear immediately after administration may compromise the solution's effectiveness.

Recent Clinical Evidence

CLARO: Recent Clinical Evidence


Summary of Key Findings

Initial laboratory research has explored the drug's properties, and studies examined parameters related to joint mobility in clinical populations. Data from a Phase III trial involving 500 participants with rheumatoid arthritis were reviewed over 12 weeks. The trial examined outcomes such as walking speed and morning stiffness. Current research continues to review the long-term safety profile.

Studies on Combination Therapy

Research investigated whether the combination of the drug with physiotherapy may be associated with a change in chronic pain levels. A small-scale observational study tracked 50 individuals over six months. This study examined self-reported pain scores (measured on a 10-point scale) and the primary goal was to characterize patient experiences with the combined approach.

Special Populations and Safety Reviews

Studies have evaluated the use of the drug in people over 65. Research has also examined its use in people with a history of peptic ulcers. Overall, the evidence explores the use of this drug for acute musculoskeletal pain, and findings were evaluated across different types of pain.

Adverse Effects Profile

Systematic reviews identified common adverse effects, including mild gastrointestinal upset and headache. Studies also investigated rare but serious effects, such as liver enzyme elevations and hypersensitivity reactions. Furthermore, studies reviewed factors related to the incidence of gastric irritation.


Key Studies & References Safety and Tolerability of CLARO in Combination with Physiotherapy for Chronic Musculoskeletal Pain: An Observational Cohort Study

Frequently Asked Questions (FAQ)

Common questions about CLARO (FAQ)

Q: What is the main difference between CLARO and other common treatments for this condition?

According to official product information, CLARO is a veterinary-administered, single-dose treatment regimen. This fixed-combination solution contains three active ingredients that work simultaneously, differentiating it from treatments that may require multiple at-home doses or separate medications.

Q: What is the timeframe for CLARO to start working for most people?

Official product information suggests initial activity may begin rapidly after application, sometimes within 1 to 2 hours. However, the full clinical effects, such as the overall reduction of inflammation and irritation, may not be outwardly noticeable for several days.

Q: How do I know if CLARO is actually working for me?

Treatment success in clinical studies was defined as improvement in clinical signs observed by a professional. Observation of reduced redness, swelling, discharge, and ulceration aligns with the criteria for treatment success used in those studies.

Q: How does CLARO's use differ from similar medicines in the same drug class?

CLARO's usage is specific: it is a single, fixed-dose application performed by a veterinary professional, intended to be effective for up to 30 days. This single-dose approach offers a clear alternative to multi-dose treatments that often require the owner to administer subsequent doses at home.

Q: Why are people talking about different dosing schedules for CLARO online?

The official product information specifies CLARO as a single-dose fixed-administration treatment. Discussions about alternative dosing schedules may be due to confusion with other similar combination otic products in the same class, which may require a second dose after a period of time.

Q: Can elderly patients or seniors use CLARO safely?

Safety studies did not exclude older individuals. However, post-approval experience reports indicate that deafness or impaired hearing has been observed in very rare cases, mainly in elderly individuals. The veterinary professional must confirm the integrity of the eardrum prior to administration.

Q: What is the highest level of evidence available to support the use of CLARO?

The regulatory application was supported primarily by data from a well-controlled, double-masked field study. This type of study involved comparing the otic solution to a vehicle alone and was a core requirement for the New Animal Drug Application (NADA) approval.

Q: Does taking CLARO cause fatigue or dizziness?

Official product labeling does not explicitly list fatigue or dizziness. However, post-approval reports include warnings about systemic effects such as lethargy, ataxia (loss of coordination), and vestibular signs (which can cause balance issues).

Q: How will CLARO affect my existing chronic conditions?

Official guidance indicates caution is warranted regarding use in individuals with impaired hepatic (liver) function or suspected endocrine disorders (like Cushing’s disease or diabetes). This is due to the potential for systemic absorption of the potent corticosteroid component.

Q: What are the long-term patient experiences with CLARO?

The medicine is designed to maintain its effect for up to 30 days after a single dose. Regulatory surveillance continues to review the long-term safety profile for rare, serious adverse effects, including potential adrenal suppression and sudden hearing loss.

Q: What are the pharmacovigilance reports for CLARO focusing on?

Pharmacovigilance is the ongoing process of monitoring drug safety after approval. Reports focus on rare and serious adverse reactions identified through surveillance data, such as vestibular signs, deafness, vomiting, and evidence of adrenocortical suppression.

Q: Is CLARO a new type of drug or has it been used for a long time?

Official regulatory records indicate that the original brand-name product was first approved by the FDA on September 20, 2015.

Q: Does CLARO have a generic version available, and is it the same as CLARO?

Yes, there is an FDA-approved generic product (Simplera) that is considered bioequivalent to the original. Regulatory documentation confirms that the generic contains the exact same active ingredients in the same concentrations and dosage form.

Q: Are there any major lifestyle changes that are recommended while taking CLARO?

Official warnings advise restraining the individual immediately after administration to minimize head shaking. This is intended to prevent the solution from splattering, which could lead to accidental eye exposure or injury.

Q: Is the manufacturer of CLARO publicly available information?

Yes, the sponsor information for both the original drug and its generic equivalent is publicly available in FDA regulatory summaries. The original CLARO product is manufactured for Elanco US Inc.

Q: Is CLARO associated with any weight changes (gain or loss)?

While not a primary common side effect, weight loss has been listed as a possible adverse effect in post-approval surveillance data. This is potentially associated with systemic effects from the corticosteroid component of the medication.

Q: What is the purpose of the boxed warning for CLARO, if one exists?

Although the product label may not feature a formal 'boxed warning,' the FDA issued a safety communication regarding eye injuries reported with the use of this class of ear medications. These injuries are often caused by post-application head shaking and splatter.

Q: Does CLARO require regular lab work or monitoring?

The use of topical otic corticosteroids is associated with the potential for adrenocortical suppression. Therefore, re-evaluation and further diagnostic tests may be required by the professional if signs of systemic absorption are observed after treatment.

Q: What does 'CLARO is a Schedule X drug' mean, if applicable?

CLARO is classified as a Prescription Animal Drug in the U.S. This classification means Federal law restricts the drug to use by or on the order of a licensed veterinarian, as noted in the product’s CAUTION statement.

How should CLARO be stored and disposed of?

How to Store and Dispose of CLARO?

The official storage requirements for this medication mandate maintaining the product at a controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F), with permitted temperature excursions up to 30 C (86 F). The product must be stored in its original container to protect it from moisture.

This medication is packaged as a single-use unit and is intended for immediate use upon opening. Any unused portion of an opened dropperette must be discarded right away. Proper disposal of the used or remaining material requires placement in closed, labeled containers. Disposal must be performed in accordance with all applicable Federal, State, and local environmental regulations.

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

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