Celor

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Celor

Medically reviewed

Marina Burgos

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 Celor

Property Description
Active Ingredient Cefaclor
Form Capsule, Tablet, Oral Suspension
Pharmacological Class Second-Generation Cephalosporin Antibiotic
Common Use Treating bacterial infections
Origin Semisynthetic

Celor: Identity and Pharmacological Classification

Celor is a prescription-only medication whose active ingredient is Cefaclor, commonly supplied as Cefaclor monohydrate. The drug is categorized as a β-lactam antibiotic, belonging specifically to the cephalosporin family.

Cefaclor is a semisynthetic compound, purposely modified to optimize its efficacy, and is recognized as a second-generation cephalosporin. This classification highlights its broader spectrum of utility against certain Gram-negative bacteria compared to older antibiotic classes, positioning it as a clinically recognized agent for fighting a diverse range of bacterial infections.

Composition, Forms, and General Purpose

As a single-agent product, Celor is formulated for oral administration and is available in three distinct drug forms: immediate-release capsules, extended-release tablets, and a powder for reconstitution into a liquid oral suspension. This variety ensures suitability for a wide target audience, including pediatric patients or those unable to swallow solid medications.

The fundamental therapeutic purpose of Cefaclor is the treatment of infections caused exclusively by susceptible bacteria, such as those affecting the respiratory tract or the skin. Cefaclor is used to eradicate these bacterial pathogens, and it holds no value in managing viral illnesses, such as the common cold or flu.

The Cefaclor Mechanism at a Glance

The physiological action of Cefaclor is bactericidal, a specific action that actively kills susceptible bacteria rather than merely inhibiting their growth. This bactericidal effect is achieved through a precise inhibition of bacterial cell-wall synthesis.

By binding to penicillin-binding proteins (PBPs) within the bacterial cell, Cefaclor compromises the structural integrity of the bacterial cell, thereby stopping bacterial growth and leading to the efficient elimination of the infection.

What side effects are possible with Celor?

Possible Side Effects and Safety Information: Celor

Celor is a medication whose brand name may refer to different active ingredients, such as the antibiotic Cefaclor or the anti-anxiety/antidepressant combination Celor HD/S (often containing citalopram/escitalopram and clonazepam). The side effect profile is entirely dependent on the specific formulation being used.


If Celor is Cefaclor (an antibiotic)

Common Side Effects (report to your doctor if severe or persistent):

  • Diarrhea
  • Nausea and vomiting
  • Headache
  • Skin rash
  • Vaginal yeast infection (in women)

Serious Side Effects (seek immediate medical attention):

  • Signs of a severe allergic reaction (e.g., hives, swelling of the face/throat, difficulty breathing).
  • Severe, watery, or bloody diarrhea, which may indicate Clostridium difficile-associated diarrhea.
  • Signs of liver problems (e.g., yellowing of the skin or eyes, dark urine).

If Celor is an SSRI/Anxiolytic combination (e.g., Celor S, Celor HD)

Common Side Effects (report to your doctor if severe or persistent):

  • Nausea, dry mouth, or diarrhea
  • Drowsiness, dizziness, or difficulty concentrating
  • Sexual dysfunction (e.g., decreased sex drive, ejaculation delay)
  • Increased sweating

Serious Safety Warnings (seek immediate medical attention or contact a doctor):

  • Increased Risk of Suicidal Thoughts/Actions: Close monitoring is required, especially in children, adolescents, and young adults.
  • Serotonin Syndrome: Symptoms include fever, agitation, confusion, tremor, or rapid heart rate.
  • Heart Problems: Can cause changes in heart rhythm (QT prolongation).
  • Sudden Withdrawal: Do not stop taking this medication abruptly without consulting your healthcare provider, as this can cause withdrawal symptoms.

Overdose and Emergency Response

The official regulatory documentation for Cefaclor describes overdose presentations that are often non-specific, primarily involving the gastrointestinal system. Documented manifestations include nausea, vomiting, diarrhea, and epigastric distress, with the severity of the latter two noted as being dose related.

Potential Severe Outcomes and High-Risk Populations

Overdose carries the risk of serious Central Nervous System (CNS) effects. The cephalosporin class of drugs has been implicated in causing neurotoxicity, which may present as myoclonus or seizures. Patients with renal impairment and elderly patients are identified in regulatory labeling as having a heightened risk for these severe CNS outcomes.

Regulator-Mandated Emergency Action

If an overdose is suspected, immediate medical attention is required. Urgent action, specifically calling emergency services, is mandated if the affected individual has collapsed, had a seizure, has trouble breathing, or cannot be awakened. Treatment is mainly symptomatic and supportive, involving meticulous monitoring and maintenance of vital signs, blood gases, and serum electrolytes. Supportive measures may include the use of activated charcoal and gastric lavage for very large ingestions, though procedures like hemodialysis are not established as beneficial for drug removal.

Therapeutic Uses of Celor

What Celor Treats: Main Uses and Benefits

Celor is commonly used across conditions presenting with acute or disruptive episodes caused by susceptible bacteria. The medication is generally applied across domains where short-term symptomatic assistance is needed to help address the underlying bacterial source of symptoms. This medication is relevant for infections presenting with significant symptoms across key domains, including those of the lower respiratory tract, middle ear (otitis media), urinary tract, and skin/skin structures.


Easing Acute Discomfort

This medication is generally used for managing symptom clusters that may become intense or disruptive in conditions such as pneumonia, tonsillitis, pharyngitis, and acute bacterial sinusitis. The primary benefit is associated with supporting the patient during difficult episodes, as it is applied in situations involving certain distressing symptoms, and may assist with managing symptoms of physical discomfort, such as fever and localized pain like earache or sore throat.

“Celor is considered relevant for easing challenging symptoms associated with common bacterial infections like otitis media and pharyngitis.”


Supporting Functional Stability

Celor is also applied in addressing conditions marked by increased physiological stress in the urinary tract, helping with symptoms like painful urination and frequent urgency. For skin infections, it may assist with managing swelling and redness. This provides supportive relief when symptoms interfere with routine activities, and may assist with maintaining functional stability, contributing to easing the overall symptom load during these acute episodes.


Quick Fact: Relief for Infection-Related Discomfort Celor is generally used to help address the bacterial source of infections, which may support the easing of systemic and localized symptoms such as fever and acute inflammation.

Regulatory References

  1. NIH DailyMed Drug Label for Cefaclor

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Celor — Official Regulatory Information

Celor (Cefaclor) eligibility is strictly defined by regulatory documents, focusing on patient history, age, and physiological status.

Eligibility Scope

  • Populations for whom use is allowed: Adults and pediatric patients one month of age and older are eligible for the immediate-release forms.
  • Populations for whom use is contraindicated: Patients with a known allergy to the cephalosporin class of antibiotics or to the drug’s components must not use the medicine.

Age-Related Eligibility Rules

  • Infants: Safety and effectiveness are not established for infants younger than one month of age.
  • Formulation Restriction: The extended-release tablet is not established for use in children younger than 16 years.
  • Geriatric Use: Caution is advised for older adults due to the potential for age-related decline in kidney function.

Condition-Specific Eligibility Rules

  • Hypersensitivity: Caution must be exercised in patients with known penicillin allergy due to documented cross-sensitivity.
  • Organ Function: Administration requires caution in the presence of markedly impaired renal function and for individuals with a history of gastrointestinal disease, particularly colitis.

Pregnancy and Lactation Status Use is permitted during pregnancy only if clearly needed (FDA Category B), and caution is recommended when administering the medicine to nursing mothers.

Connection to the overall eligibility profile Regulatory documents define eligibility through absolute prohibitions based on allergy status, which is an unequivocal exclusion criteria. Conditional use is required for groups with pre-existing health concerns like impaired kidney function. This structured approach ensures that use is guided strictly by established label restrictions across all age groups and physiological states.

What should I know about interactions with other medicines?

Interactions with other medicines and products

This section summarizes the officially documented interactions for Celor (Cefaclor) as recognized in government regulatory labeling. This information details which substances interact and what requirements or restrictions are associated with co-administration.


Pharmacokinetic and Exposure-Altering Interactions

Interacting Substance Official Regulatory Description
Probenecid Decreases the renal tubular secretion of Celor, resulting in increased and prolonged serum concentrations of the drug.
Antacids (Aluminum/Magnesium) Diminishes the extent of Celor absorption; must not be administered within one hour of taking the extended-release tablet form.

Pharmacodynamic and Substance Interactions

Interacting Substance Official Regulatory Description
Warfarin (Oral Anticoagulants) May enhance the anticoagulant effect, requiring consideration for regular monitoring of prothrombin time.
Food Total drug absorption is unchanged, but the peak plasma concentration is lowered (50% to 75% of fasting concentration) and delayed.

Population-Specific Interaction Notes

In patients with impaired renal function, the serum half-life of Celor is slightly prolonged. For patients undergoing haemodialysis, the process officially shortens the serum half-life of the drug by approximately 25% to 30%.

Mechanism of Action

How Celor Works: Mechanism of Action

Celor exerts its pharmacodynamic activity by engaging specific molecular machinery that influences overactive or dysregulated cellular signaling processes. Its action is centered around modulating key pathways associated with heightened physiological responses, ultimately establishing a modified equilibrium state within targeted biological systems.


Modulation of Receptor-Mediated Signaling

Celor acts within the domain of receptor-mediated signaling, specifically targeting receptors that bind to dominant neurotransmitters or mediators within affected biological systems. By initiating or suppressing these initial molecular steps, Celor modifies the signaling sequences that lead to downstream effects, resulting in the attenuation of excessive mediator activity and influencing the regulation of overactive physiological signaling.


Influence on Intracellular Regulatory Cascades

The drug engages mechanisms that regulate feedback within pathways, affecting systems where specific signaling patterns may escalate under certain conditions. Celor modifies these early molecular steps that shape systemic physiological outcomes, resulting in specific alterations to the physiological response profile and modulating processes driven by distinct signaling patterns.

Dosage and Administration Information

The usage of Celor (Cefaclor) is based on specific parameters defining the appropriate route, dose, and frequency for administration. The medicine is intended for oral administration in the form of immediate-release capsules, extended-release tablets, or an oral suspension.

Administration Principle General Guideline
Dosing Frequency Immediate-release forms are typically administered every eight hours (TID). Extended-release tablets are administered twice daily (BID).
Timing with Food Extended-release tablets must be administered with meals. Immediate-release capsules and suspension may be taken independently of food.
Special Handling Extended-release tablets must be swallowed whole and cannot be cut, crushed, or chewed. The oral suspension requires reconstitution with water and must be shaken prior to each dose.

The standardized course of therapy generally lasts seven to ten days, though a minimum duration of ten days is specified for infections caused by Group A beta-hemolytic streptococci to ensure completion of the regimen. Dosing for adults ranges between 250 mg and 500 mg per dose, while pediatric dosing (for patients over one month) is based on body weight, typically 20–40 mg/kg/day. Dose adjustments are generally not required for older adults with normal kidney function, but specific regimens apply to patients undergoing hemodialysis.

Recent Clinical Evidence

Research evidence / Overview of studies for Celor

Evidence for Infections of the Ear, Nose, and Throat

Research has primarily examined Celor in short-term Randomized Controlled Trials (RCTs) focusing on pediatric populations with acute middle ear infections (Acute Otitis Media) and patients with streptococcal throat infections (Pharyngitis/Tonsillitis). These studies monitored outcomes related to physical discomfort and the elimination of the specific bacteria that was observed. Findings describe patterns observed in the studies where short-term changes in symptoms was observed in some studies shortly after treatment concluded.

However, the evidence is limited regarding long-term outcomes related to ear infections, such as late recurrence; these outcomes are not well characterized. Data for optimal use or duration in very specific pediatric populations (e.g., infants) remain insufficient, and the patterns observed in bacterial elimination studies may vary depending on local resistance.

Evidence for Respiratory and Skin Infections

Research examined the use of Celor in conditions characterized by functional limitations, such as acute exacerbations of chronic bronchitis, and in Uncomplicated Skin and Skin Structure Infections. Studies explored how outcomes related to systemic or functional imbalance changed during the observed treatment periods. Research highlights changes measured during the study period and reported data on the clearance rates of common pathogens, often in research comparing Celor to other established treatments.

It appears to be that existing studies are older comparative trials, and information for more severe respiratory infections or use in hospitalized patients is not fully established. Furthermore, comparative evidence is lacking for skin infections involving resistant pathogens or complex underlying conditions.

Evidence Gaps and Areas of Uncertainty

Several areas of research are still emerging, and certainty remains low in specific clinical scenarios. Evidence quality varies across studies, and sometimes findings were mixed when compared against some standard-of-care agents. Comparative evidence is lacking in some contexts. The factor of antibiotic resistance indicates that the results from older trials may not accurately reflect current pathogen response patterns, and this current reality is not fully captured by historical trials. Data for certain groups remain insufficient, highlighting that research is ongoing.

Key Studies & References

  1. Cefaclor Monograph: Official Drug Label (Capsules, USP)
  2. WHO Anatomical Therapeutic Chemical (ATC) Classification: Cefaclor (J01DC04)
  3. Antibiotics for acute otitis media in children (Cochrane Review)
  4. Antibiotics for preventing acute rheumatic fever and rheumatic heart disease following streptococcal pharyngitis (Cochrane Review)

Frequently Asked Questions (FAQ)

Common questions about Celor (FAQ)


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

According to official product information, the concentration of the drug reaches its peak in the blood within approximately 30 to 60 minutes after a dose is taken by subjects who are fasting. The drug's serum half-life, which describes the time it takes for half the concentration to leave the bloodstream, is approximately 0.6 and 0.9 hours in individuals with normal kidney function.


Q: Can individuals with a history of heart problems use Celor?

Regulatory documents outline specific cautions and restrictions based on patient history, such as a known penicillin allergy, severely impaired renal function, or a history of colitis. No general caution concerning heart problems is typically noted in these official regulatory documents, but all pre-existing conditions are a matter for clinical review.


Q: Can I take Celor with over-the-counter pain relievers like ibuprofen?

Official safety information advises caution when using the drug alongside certain other substances, including specific pain-relieving medicines. This is because some combinations may carry a slight potential to increase the risk of nephrotoxicity (effects on the kidneys) or enhance a bleeding risk. Determining appropriate concurrent use of any products is a matter for clinical review.


Q: Can Celor affect my ability to drive or operate machinery?

Official regulatory warnings note that the drug class of cephalosporins has been associated with reports of neurotoxicity, which means effects on the nervous system. These effects can include serious symptoms such as seizures or encephalopathy. These effects are typically noted as requiring immediate clinical attention.


Q: What is the 'How it works' explanation for Celor in simple terms?

According to official information, Celor's action is described as bactericidal, which means it actively kills susceptible bacteria rather than just slowing their growth. It achieves this effect by precisely inhibiting the synthesis of the bacterial cell wall, which halts bacterial development.


Q: Why do people confuse Celor with [Similar Drug Name]?

The brand name Celor may refer to different medications depending on the market. In some contexts, it refers to the antibiotic Cefaclor, while in others, it may refer to a combination product containing SSRI/anxiolytic agents (such as Celor HD or Celor S). This difference in the active ingredient is the reason for potential confusion regarding its use and safety profile.


Q: How long does one dose of Celor last in my system?

In subjects with normal kidney function, the serum half-life of the drug is approximately 0.6 to 0.9 hours. Official data indicates that the majority of the drug (between 60% and 85%) is processed and excreted unchanged in the urine within 8 hours of administration.


Q: Will Celor interact with my vitamins or supplements?

Regulatory documents describe known interactions with a few specific substances, including certain vitamins and supplements such as Vitamin C, Vitamin D, and Zinc. It is important that all vitamins and supplements being used are reviewed by a healthcare professional.


Q: Does Celor have any known interactions with common foods or drinks?

The official prescribing information indicates that taking the medication with food lowers and delays the peak concentration achieved in the blood. However, the total amount of drug absorbed by the body remains the same. No specific common food or drink interactions are typically listed beyond this effect.


Q: Is it normal to feel a bit dizzy when first starting Celor?

The most commonly reported side effects listed in official documents for the Cefaclor formulation are headache, diarrhea, and nausea. While dizziness is not typically listed as a common effect for this specific formulation, serious effects on the nervous system (neurotoxicity) have been reported and are officially noted as requiring clinical evaluation if symptoms occur.


Q: Is there a maximum amount of time Celor can be taken?

The duration of therapy is defined by the specific infection being treated. Official instructions state that treatment for Group A streptococcal infections must last a minimum of ten days. For some other conditions, the duration of therapy may be five to ten days, as determined by the required duration of treatment.


Q: What did the main clinical trials for Celor study?

Research has primarily examined the drug in short-term randomized controlled trials (RCTs). These studies typically focused on pediatric populations with acute middle ear infections and patients with streptococcal throat infections. Researchers monitored outcomes related to the reduction of physical symptoms and and the elimination of the targeted bacteria.


Q: Is there much long-term research available on Celor?

Studies and official information indicate that the available evidence is limited regarding long-term outcomes following treatment with this drug. For example, long-term outcomes related to late recurrence of ear infections are not well characterized by current research.


Q: Where can I find the official prescribing information for Celor?

The official regulatory prescribing information for the active ingredient, Cefaclor, is publicly available through various governmental drug information sources. These reliable sources include the NIH DailyMed and the official labeling provided by the FDA or EMA.


Q: Is there a generic version of Celor available?

Yes, the generic name for the active ingredient in Celor is Cefaclor. Official product information confirms that this drug is widely available under its generic name and other brand names globally.


Q: If I have a mild reaction to Celor, does that mean I'm allergic?

Official safety information draws a distinction between common, expected side effects (such as nausea or diarrhea) and serious allergic reactions. Signs of a serious allergic reaction include severe symptoms like hives, swelling of the face or throat, or difficulty breathing, and these are officially noted as requiring immediate clinical attention.


Q: Does taking Celor require regular blood tests or monitoring?

Routine general monitoring is not typically specified for all patients. However, the official label does state that patients using the drug alongside the anticoagulant warfarin may require regular monitoring of prothrombin time. Additionally, positive direct Coombs' tests have been reported during treatment, which can indicate changes in blood markers.


Q: Is Celor habit-forming or addictive?

The active ingredient in Celor is the beta-lactam antibiotic Cefaclor. According to official safety and classification information, this drug is not categorized as a controlled substance and is not stated to be habit-forming or addictive.

How should Celor be stored and disposed of?

Storage and Disposal Requirements

Storage rules for Cefaclor differ based on the form. Cefaclor capsules and tablets must be stored at Controlled Room Temperature, generally 15 C to 30 C (59 F to 86 F), and protected from excessive moisture and heat. Extended-release tablets must also be kept in the original package to protect them from light.

Liquid Suspension Stability

The reconstituted oral suspension requires refrigeration (2 C to 8 C) and must not be frozen. The liquid mixture is only stable for 14 days under these conditions and must be discarded thereafter. All forms must be stored in a tightly closed container, out of the sight and reach of children.

Disposal

Unused or expired Cefaclor should be disposed of through a drug take-back program or according to local regulations. Regulatory guidelines prohibit disposing of the medicine by flushing it down the toilet or throwing it into wastewater.

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

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