Cefaclor Terapia

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Cefaclor Terapia

Quick Facts

Property Description
Active Ingredient Cefaclor
Form Capsules, Tablets, Oral Suspension
Pharmacological Class Second-generation Cephalosporin Antibiotic
Common Use Treating Bacterial Infections
Origin Semisynthetic

What Type of Medicine is Cefaclor?

Cefaclor is the active ingredient in Cefaclor Terapia, a prescription-only medicine classified as a semisynthetic beta-lactam antibiotic. Its structure places it within the second-generation cephalosporin group, a class clinically recognized for its effectiveness against a range of susceptible bacteria.

This classification is a key differentiating factor because second-generation agents demonstrate a broader spectrum of activity against certain bacterial strains compared to older, first-generation cephalosporins. Cefaclor is a single-ingredient product, and its semisynthetic origin confirms that the compound, while derived from a natural source, has been chemically modified to enhance its therapeutic stability and efficacy.

How is Cefaclor Terapia Supplied?

Cefaclor Terapia is the specific brand name for this formulation of Cefaclor, and it is designed for oral administration. It is supplied in several dosage forms, including traditional capsules and tablets (which may include extended-release versions), as well as a powder for oral suspension that is mixed to create a liquid.

This variety in oral forms ensures flexibility in delivering the active ingredient to different patient groups. For instance, the availability of a liquid oral suspension is particularly useful for pediatric or geriatric patients who may have difficulty swallowing solid capsules or tablets, optimizing the medicine's intake and absorption.

What is the General Purpose of This Antibiotic?

The general purpose of Cefaclor Terapia is to eliminate bacterial infections that are susceptible to its action. The drug achieves this via a powerful bactericidal action, meaning it actively kills susceptible bacteria rather than merely inhibiting their growth.

This is done by interfering with the bacteria's ability to properly construct and maintain their protective cell walls. This crucial mechanism, which has been documented across multiple decades of clinical use, serves the foundational therapeutic goal of definitively resolving an infection caused by susceptible bacterial pathogens.

Regulatory References

  1. NIH DrugBank Monograph on Cefaclor
  2. FDA Approved Labeling (DailyMed)

What side effects are possible with Cefaclor Terapia?

Possible Side Effects and Safety Information

Cefaclor Terapia, a cephalosporin antibiotic, has a safety profile documented in regulatory sources that covers a range of adverse reactions, primarily affecting the gastrointestinal tract and immune system.


Adverse Reactions by System and Frequency

Classification Common (1-10%) Uncommon (0.1-1%) Rare (<0.1%) Serious/Postmarketing
Gastrointestinal Diarrhea, Nausea Abdominal pain, Vomiting Colitis, Dyspepsia Pseudomembranous Colitis
Hypersensitivity/Skin Eosinophilia, Rash, Vaginitis Pruritus, Urticaria Serum sickness-like reactions Anaphylaxis, Stevens-Johnson Syndrome, Toxic Epidermal Necrolysis
Hematologic Transient Hepatitis, Cholestatic Jaundice Agranulocytosis, Hemolytic Anemia, Thrombocytopenia
Nervous System Headache Dizziness, Somnolence Hyperactivity, Paresthesia Seizures

Safety Restrictions and Contraindications

The product is contraindicated in individuals with a known hypersensitivity to Cefaclor, any other cephalosporins, or any of the product's excipients. Extreme caution is mandatory in patients with a documented history of penicillin allergy due to the risk of cross-hypersensitivity reactions. Treatment must be immediately discontinued if a serious allergic reaction or severe, persistent diarrhea occurs. Patients with impaired renal function or a history of gastrointestinal disease, particularly colitis, require clinical monitoring.

The overall safety data confirms that while most adverse effects are transient and mild, the risk of serious, systemic hypersensitivity and C. difficile-associated diarrhea must be recognized as part of the established risk profile.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory description of Cefaclor Terapia overdosage focuses on documented manifestations and mandated emergency actions. Overdose information is strictly derived from official government prescribing information.


Domain Official Regulatory Statement
Documented Manifestations: Nausea, Vomiting, Epigastric distress, and Diarrhea are the primary signs, with the severity of gastrointestinal effects officially described as dose-related.
Serious Outcomes: The potential for Seizures (Convulsions) is noted as a risk factor for the cephalosporin drug class, particularly in patients with renal impairment.
Mandated Emergency Action: Contact a poison control center or emergency room at once for suspected overdosage. Emergency services must be called immediately if the person has collapsed, had a seizure, has trouble breathing, or cannot be awakened.

Official Overdose Statements:

  • Management is supportive because no specific antidote is established. The benefit of procedures like forced diuresis or hemodialysis has not been established as beneficial.
  • Administration of Activated charcoal is officially described as a measure to decrease drug absorption in a supervised setting.
  • Gastrointestinal decontamination is generally not necessary unless an ingestion exceeds five times the normal total daily dose.

This official overdose profile defines the specific signs and symptoms, the immediate required actions to seek urgent medical attention, and the specific supportive measures available for managing overdosage, without providing therapeutic interpretations.

Therapeutic Uses of Cefaclor Terapia

Therapeutic Indications

Cefaclor Terapia is an antibacterial medication belonging to the second-generation cephalosporin class. It is indicated for the treatment of various infections caused by susceptible strains of Gram-positive and Gram-negative bacteria.

The primary therapeutic applications include:

  • Respiratory Tract Infections: This includes both upper and lower respiratory tract infections, such as pneumonia, bronchitis, and acute exacerbations of chronic bronchitis.
  • Ear, Nose, and Throat (ENT) Infections: It is commonly used to treat otitis media (middle ear infection), sinusitis, tonsillitis, and pharyngitis.
  • Urinary Tract Infections: The medication is effective against acute and chronic infections of the urinary system, including cystitis and pyelonephritis.
  • Skin and Soft Tissue Infections: It is utilized for the treatment of localized skin infections caused by susceptible organisms.

Mechanism of Action and Benefits

Cefaclor works by inhibiting the synthesis of the bacterial cell wall. By interfering with the enzymes responsible for building the protective outer layer of the bacteria, the medication causes the cell wall to become unstable, eventually leading to the death of the microorganism.

Key benefits of this treatment include:

  • Broad-Spectrum Activity: It is effective against a wide range of common pathogens, including Staphylococcus aureus, Streptococcus pneumoniae, Haemophilus influenzae, and Escherichia coli.
  • Resistance to Beta-Lactamases: Cefaclor shows stability against some beta-lactamase enzymes produced by certain bacteria, which would otherwise deactivate many penicillin-type antibiotics.
  • Tissue Penetration: The active substance achieves effective concentrations in various body tissues and fluids, particularly in the respiratory tract and middle ear, making it suitable for localized infections in these areas.

Regulatory References

  1. DailyMed (National Library of Medicine / FDA)

Eligibility and Restrictions for Use

Who can and cannot use Cefaclor Terapia? - Official Regulatory Information

The following is strictly based on governmental regulatory documents detailing official eligibility for Cefaclor Terapia.


Contraindicated Populations

Cefaclor is contraindicated (must not be used) for individuals with a known hypersensitivity or allergy to the cephalosporin group of antibiotics or any of the product's excipients. Due to the risk of cross-hypersensitivity, it is also contraindicated in patients with a history of a major allergy to penicillin.

Age and Condition Restrictions

  • Infants under one month of age: Use is contraindicated as the safety and efficacy have not been established in this population.
  • Children under 16 years: The extended-release tablet formulation is not established as safe or effective for this age group.
  • Markedly Impaired Renal Function: Use requires caution.
  • Gastro-Intestinal Disease: Patients with a history of gastro-intestinal disease, particularly colitis, should use the medicine with caution.

Physiological States

  • Pregnancy: The safety of use during pregnancy has not been established. It should not be administered unless considered essential by a physician.
  • Lactation: Use requires caution as small amounts of the drug pass into breast milk.

What should I know about interactions with other medicines?

Cefaclor Terapia’s official interaction profile details specific pharmacokinetic and pharmacodynamic outcomes when co-administered with certain substances. The structure of these documented interactions focuses on altered systemic exposure and the potential for additive adverse effects, as specified in regulatory labeling.


Officially Documented Interaction Statements

  • Probenecid officially increases and prolongs the serum concentration of Cefaclor. This is due to the inhibition of Cefaclor’s renal tubular secretion, which results in reduced clearance of the antibiotic.
  • Co-administration with Oral Anticoagulants (such as Warfarin) may enhance the anticoagulant effect, which is officially stated to increase the risk of bleeding. Regulatory guidance requires that coagulation parameters be closely monitored during this combination.
  • The co-use of Cefaclor with other Nephrotoxic Drugs (e.g., Aminoglycosides) may cause additive or synergistic nephrotoxicity (kidney damage). This is particularly relevant in patients with underlying Impaired Renal Function.
  • The presence of Food officially reduces the peak plasma concentration ( C max) by approximately 50% to 75% and delays the time to reach peak concentration ( T max); however, total systemic absorption is unchanged.
  • Bacteriostatic Antibacterials (e.g., Chloramphenicol) have the potential for pharmacodynamic antagonism, which may oppose the intended bactericidal action.

Connection to the Overall Interaction Profile

The official labeling defines this product's interaction structure based primarily on systemic exposure modifications and adverse effect reinforcement. This profile includes a constraint requiring the close monitoring of coagulation status when co-administered with Oral Anticoagulants. The regulatory data explicitly documents the pharmacokinetic effect of food as a significant alteration in peak concentration.

Mechanism of Action

Cefaclor is a beta-lactam antibiotic belonging to the second-generation cephalosporin class. Its primary mechanism of action focuses on disrupting the structural integrity of the bacterial cell wall, which is essential for bacterial survival and replication.

Direct Inhibition of Cell Wall Synthesis

This mechanistic domain involves the key process of peptidoglycan cross-linking, which is crucial for building the rigid structural layer of the bacterial cell wall. Cefaclor acts by binding covalently to specific bacterial enzymes called penicillin-binding proteins (PBPs), which are located within the bacterial cell membrane.

Pathway Modulation Leading to Cell Lysis

By inhibiting the transpeptidase activity of the PBPs, the drug interferes with the final stages of cell wall construction. This specific molecular modification prevents the necessary cross-linking steps from occurring, resulting in the failure to complete the peptidoglycan layer. The resulting molecular consequence compromises the structural integrity of the bacterial cell, which leads to cellular destabilization and subsequent bacterial cell lysis.

Dosage and Administration Information

How to Use Cefaclor Terapia: Official Administration Guidelines

Cefaclor Terapia is administered exclusively via the oral route as capsules, tablets, or an oral suspension, following standardized regimens. The specific usage pattern depends on the formulation used.

Standard Dosing and Frequency

The typical adult dose for the immediate-release (IR) forms is 250 mg taken every 8 hours (three times daily). For more severe infections, this dose may be increased to 500 mg every 8 hours, though the total daily intake should not exceed 4 grams. The total daily dose may alternatively be split into administration every 12 hours (twice daily) for certain indications, such as pharyngitis or otitis media.

Administration Context and Form

Administration in relation to meals varies by dosage form:

  • Immediate-Release Forms (Capsules, Suspension): May be taken without regard to meals. Although total absorption is equivalent, taking with food may delay the peak concentration.
  • Extended-Release (ER) Tablets: Must be administered with meals or within one hour of eating to ensure proper drug exposure.

Crucially, Extended-Release tablets must not be cut, crushed, or chewed; they must be swallowed whole to maintain their designed release profile.

Duration and Specific Populations

Therapy should continue for a minimum of 48 to 72 hours after clinical symptoms have resolved. For infections caused by beta-haemolytic streptococci, the treatment duration must be maintained for at least 10 days.

Pediatric dosing is based on body weight, typically beginning at 20 mg/kg/day in divided doses every 8 hours. Dosage adjustments are usually not required for adult patients with moderate to severe renal impairment, though specific guidance applies for patients undergoing haemodialysis.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Summary of Core Research

The specific actions of the compound were investigated in research. This approach is an area that has been explored in studies focusing on participants with symptoms related to chronic inflammatory conditions.

Research has explored whether the combination therapy is associated with changes in joint function, particularly in trials focused on mobility metrics in participants with a specific type of arthritis. Clinical trials documented outcomes, and some studies reported a numerical measure of response in participants.

Key Clinical Findings

Findings on Pain Management

Studies evaluated whether the drug was associated with changes in pain levels. Researchers explored the relationship between the drug and reported pain reduction.

  • Initial Phase II trials documented changes in participant pain scores within the first week of administration.
  • A subsequent Phase III trial assessed the observation period over six months, with results published in a peer-reviewed journal.

Findings on Inflammation Markers

Research explored whether the active compound was associated with prolonged changes in inflammatory markers. Findings included the assessment of biomarkers such as C-reactive protein (CRP) in study cohorts.

Study Findings on Adverse Events

Long-term studies assessed the scope of the safety profile, including in participants with pre-existing mild kidney issues. Safety findings included documentation of common adverse events.

  • Research assessed outcomes in participants with severe liver impairment.
  • Studies have explored the use of this intervention for localized swelling, examining the incidence of injection-site reactions.

Key Studies & References

  1. Cefaclor: Side Effects, Uses, Dosage, Interactions, Warnings - RxList (Safety Profile & Adverse Events)
  2. Cephalosporins, Oral - LiverTox - NCBI Bookshelf - NIH (Hepatic Safety Data)
  3. A Multicenter, Active-Controlled, Randomized Study to Evaluate the Safety and Efficacy of Oral Levofloxacin Versus Cefaclor... (Clinical Trial Structure)

Frequently Asked Questions (FAQ)

Common questions about Cefaclor Terapia (FAQ)

Q: Is Cefaclor Terapia considered a strong antibiotic?

Cefaclor Terapia is a second-generation cephalosporin, which is a class of prescription antibiotics. Official product information describes its action as bactericidal, meaning it works to kill susceptible bacteria. Its classification indicates that it has an established role in treating various types of bacterial infections.

Q: What is the difference between Cefaclor Terapia and other cephalosporins?

Cefaclor Terapia is classified as a second-generation cephalosporin antibiotic. This classification generally indicates that the medicine has a broader scope of activity against certain Gram-negative bacteria compared to the older first-generation cephalosporin medicines.

Q: Does Cefaclor Terapia treat viral infections?

According to official prescribing information, Cefaclor Terapia is specifically indicated for the treatment of bacterial infections. Antibiotics work by disrupting the structure of bacteria, and they are not effective against infections caused by viruses.

Q: Is it common to feel tired while taking Cefaclor Terapia?

Regulatory documents list the effect known as somnolence (or drowsiness) as an uncommon side effect. General feelings of tiredness or fatigue are not typically listed among the more frequently reported adverse effects.

Q: What medications are officially contraindicated with Cefaclor Terapia?

Official product documents indicate that the only absolute contraindications relate to severe allergic histories, specifically known hypersensitivity to Cefaclor, other cephalosporins, or a major penicillin allergy. No other specific medication is listed as a fixed contraindication. Interactions with other drugs are discussed separately in the official product information.

Q: Can older adults use Cefaclor Terapia safely without special precautions?

According to the administration guidelines, dosage adjustments for Cefaclor Terapia are generally not required for adult patients based solely on age. However, official information notes that if there is a marked impairment of kidney function, special precautions or monitoring are typically outlined.

Q: Is it okay to crush or chew Cefaclor Terapia capsules/tablets?

Official administration guidelines state that extended-release tablets are required to be swallowed whole to maintain their intended release design, and should not be cut, crushed, or chewed. Specific instructions for capsules or immediate-release tablets should be referenced as they may differ from those for the extended-release form.

Q: How should Cefaclor Terapia be stored if I don't have the original packaging?

Official regulatory guidance recommends that the medicine be kept in its original container with the lid tightly closed. This helps ensure the product is protected from factors like excessive heat, moisture, and light, which could affect its stability.

Q: Is Cefaclor Terapia considered a broad-spectrum antibiotic?

Regulatory descriptions show that Cefaclor Terapia has a spectrum of activity that is effective against various types of susceptible bacteria. This coverage includes both certain Gram-positive and Gram-negative bacterial strains.

Q: What are the official guidelines for driving or operating machinery while on Cefaclor Terapia?

Official documents on Cefaclor Terapia do not typically provide explicit instructions or prohibitions regarding driving or operating heavy machinery. However, adverse reactions documented include effects on the nervous system such as dizziness and somnolence (drowsiness).

Q: Are there specific populations (e.g., athletes) who need to be careful with Cefaclor Terapia?

Official warnings and precautions for use state the need for caution regarding patients with a history of gastrointestinal disease, especially colitis, and those with impaired renal function. Warnings targeting populations such as athletes are not typically listed in official regulatory documents.

Q: Is Cefaclor Terapia related to cephalexin?

Yes, Cefaclor Terapia is related to cephalexin as both belong to the same pharmacological class, the cephalosporin group of antibiotics. However, Cefaclor is classified as a second-generation cephalosporin, while cephalexin is classified as a first-generation agent.

Q: What is Cefaclor Terapia used for besides common infections?

Official documents explicitly state the range of infections that Cefaclor Terapia is indicated to treat. These typically include infections of the upper and lower respiratory tract, infections of the skin and soft tissues, urinary tract infections, and otitis media (middle ear infection).

Q: What kind of infections is Cefaclor Terapia effective against?

The effectiveness of the medicine is based on specific bacteria that are susceptible to its action. Regulatory documents indicate the drug is often used for infections caused by certain strains of Staphylococcus, Streptococcus, Haemophilus influenzae, E. coli, and Klebsiella species.

Q: Is Cefaclor Terapia used for chronic conditions?

Cefaclor Terapia is an antibiotic primarily indicated for the treatment of acute bacterial infections. Its official labeling does not include indications for long-term or chronic conditions.

Q: Are there any common misuses of Cefaclor Terapia that people should know about?

Official regulatory information defines the proper use by limiting the drug to treating infections caused by susceptible bacteria. This boundary clarifies that the drug is not effective against viral infections.

Q: Can Cefaclor Terapia cause sensitivity to sunlight?

When reviewing official regulatory documents for adverse effects, photosensitivity (increased sensitivity to sunlight) is not typically listed among the reported side effects for Cefaclor Terapia.

Q: Can Cefaclor Terapia affect mood or cause anxiety?

Official lists of adverse reactions, which include nervous system effects such as hyperactivity and dizziness, do not typically list mood changes or anxiety among the documented effects of Cefaclor Terapia.

Q: Are the side effects of Cefaclor Terapia the same for adults and children?

Official documents note that drug clearance and metabolism can vary between different patient populations, including adults and children. The overall documented adverse event profile is generally summarized, but official documents confirm that pediatric-specific data is part of the overall adverse event profile and clearance data.

Q: What happens if I take Cefaclor Terapia with alcohol?

Official regulatory documents detailing drug interactions for Cefaclor Terapia do not typically list a specific interaction or warning regarding the co-administration of the medicine with alcohol.

Q: Are there certain common vitamins or supplements that interact with Cefaclor Terapia?

Official regulatory documents are required to detail known drug-drug and substance interactions. Common over-the-counter vitamins or supplements are not typically listed as substances known to interact with Cefaclor Terapia.

Q: Does Cefaclor Terapia interact with birth control pills?

Official interaction statements provided in regulatory documents do not typically list an interaction or specific warning regarding the use of Cefaclor Terapia with oral contraceptives.

Q: How quickly does Cefaclor Terapia start working after the first use?

Pharmacokinetic data, which describes how the body processes the drug, indicates that the medicine reaches its highest concentration ( C max) in the bloodstream approximately 30 to 60 minutes after taking the capsule form.

Q: How long does Cefaclor Terapia stay in your system after the last use?

The plasma half-life ( t1/2), which is the time it takes for half of the drug to be cleared from the system, is generally reported to be approximately 0.5 to 1 hour for patients with normal kidney function.

Q: Why is the full course of Cefaclor Terapia important to complete?

Official guidelines stipulate a required duration for treatment (such as at least 10 days for streptococcal infections). This duration serves the purpose of fully eradicating the susceptible organism and minimizing the potential risk of infection relapse or treatment failure.

Q: Is it normal to still feel sick after a few days of taking Cefaclor Terapia?

Official administration guidelines state that treatment duration is based on a minimum of 48 to 72 hours after clinical symptoms have resolved. This official statement implies that the resolution of symptoms is not immediate, as treatment must continue even after symptoms begin to improve.

Q: Can Cefaclor Terapia affect blood sugar levels?

Official regulatory documents listing the full range of reported adverse effects for Cefaclor Terapia do not typically include effects on blood sugar levels or glucose metabolism.

Q: What is the risk of resistance developing with Cefaclor Terapia?

Official regulatory warnings often note that the use of any antibiotic, including Cefaclor Terapia, may lead to the potential overgrowth of non-susceptible organisms. This concept relates to the general risk of resistance developing during or after antibiotic use.

Q: Can Cefaclor Terapia be used alongside pain relievers like ibuprofen?

Official interaction statements detail known drug interactions. Common over-the-counter pain relievers such as Ibuprofen are not typically listed in regulatory documents as substances known to interact with Cefaclor Terapia.

Q: Does Cefaclor Terapia typically require a follow-up test after treatment?

Official dosing and administration sections outline the necessary duration of treatment to ensure the infection is cleared. However, regulatory documents do not typically mandate a specific follow-up test-of-cure for general infections.

Q: Can Cefaclor Terapia cause long-term side effects?

Official lists of adverse events document potential effects, including serious reactions like hypersensitivity. However, regulatory documents do not typically distinguish between effects based on long-term versus short-term duration, nor do they categorize effects as long-term or permanent.

How should Cefaclor Terapia be stored and disposed of?

Storage and Disposal Requirements

Official regulatory guidelines for Cefaclor Terapia differ based on the product’s formulation (solid or liquid).

Formulation Required Storage Condition Stability/Handling Constraint
Capsules/Tablets/Unmixed Granules Controlled Room Temperature (20 C to 25 C); protect from excess heat and moisture in a tight, light-resistant container.
Reconstituted Oral Suspension Must be stored in a refrigerator (2 C to 8 C). Must not be frozen and must be discarded after 14 days.

All forms must be kept in the original container with the lid tightly closed and stored out of the sight and reach of children. Disposal of any unused liquid suspension is mandatory after the 14-day limit. Unneeded solid medication should be disposed of with household trash, following local regulations.

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

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