Anaclosil

Quick links to important sections

Anaclosil

Method of action: Bactericidal

Treatment option: Abscess

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 Anaclosil

Quick Facts

Property Description
Active Ingredient Cloxacillin (typically as Cloxacillin sodium)
Form Capsules, powder for oral solution, powder for injection
Pharmacological Class Beta-lactam antibiotic, Penicillinase-resistant penicillin
Common Use Treating specific bacterial infections
Origin Semi-synthetic

What Type of Medicine is Anaclosil (Cloxacillin)?

Anaclosil is a prescription-only medicinal agent defined by its active ingredient, Cloxacillin, most frequently supplied as Cloxacillin sodium. This compound is classified within the pharmacological class of beta-lactam antibiotics, a category recognized globally as an essential medicine. It holds the specialized designation of a penicillinase-resistant penicillin.

Cloxacillin is a semi-synthetic medicine, chemically derived from the core penicillin structure, which is the 6-aminopenicillanic acid nucleus. This modification is clinically recognized for enhancing its stability against certain bacterial defenses. It is manufactured as a single entity product, focusing its therapeutic action exclusively through Cloxacillin.


What is the General Purpose of This Antibiotic?

The general purpose of Anaclosil is to function as a bactericidal agent for the elimination of susceptible bacterial infections. As an antibiotic, its role is to directly attack and kill the microorganisms causing illness.

The drug’s primary differentiating feature is its resilience to bacterial defenses. This medicine is chemically designed to resist the deactivating action of the beta-lactamase enzyme, which many bacteria use to destroy standard penicillins. By neutralizing the organisms that employ this defense mechanism, Cloxacillin is typically used to manage infections caused by susceptible Staphylococcal and Streptococcal species. This specialized resistance supports its use in targeted antimicrobial therapy.


What Forms of Anaclosil Are Available?

Anaclosil is supplied as a single entity product in several common dosage forms tailored for different routes of administration. These forms include capsules and a powder for oral solution, enabling oral intake. Additionally, the drug is available as a sterile powder for injection that requires reconstitution for parenteral administration, specifically for intravenous (IV) or intramuscular (IM) injection, ensuring flexibility in clinical use.

What side effects are possible with Anaclosil?

Possible Side Effects and Safety Information

The safety profile for Anaclosil is officially documented through regulatory bodies, which classify adverse events based on frequency and the body system affected to provide a comprehensive understanding of the associated risks.

Adverse Reactions Scope

Adverse reactions reported during clinical trials and post-marketing surveillance are organized using a standardized frequency framework. These frequencies (e.g., Very Common, Common, Uncommon, Rare) define the likelihood of a specific event occurring. All reported effects are also grouped by System-Organ Class (SOC) to indicate which major body system is impacted, such as Gastrointestinal Disorders, Nervous System Disorders, or Skin and Subcutaneous Tissue Disorders.

Serious Adverse Reactions (SARs): Regulatory labeling identifies specific serious adverse reactions that are considered life-threatening, result in hospitalization, or cause persistent or significant disability. These clinically significant events are highlighted to inform the overall risk-benefit assessment.

Classification Example Categories of Adverse Reactions
Frequency Very Common (≥1/10), Common (≥1/100 to <1/10), Uncommon, Rare
System-Organ Class Blood and Lymphatic System, Gastrointestinal, Skin, Nervous System

Safety-Related Restrictions and Limitations

Official regulatory documents define specific safety-related limitations that restrict the use of Anaclosil. These include formal Contraindications, which are conditions or concurrent therapies where the medicine must not be used due to a high risk of harm. The documents also include Special Warnings and Precautions, which detail patient populations or clinical situations requiring extreme caution, monitoring, or dose adjustment (e.g., use in patients with severe renal or hepatic impairment).

Population-Specific Considerations: Safety data may necessitate specific warnings for certain patient groups, such as the elderly or individuals with pre-existing organ dysfunction, where the risk of particular side effects may be increased.

This structured regulatory profile defines the established risk factors and necessary safety boundaries for the use of Anaclosil, ensuring that the known potential negative outcomes are clearly communicated.

Overdose and Emergency Response

The official regulatory profile for Cloxacillin overdose centers on acute CNS Neurotoxicity resulting from massive drug exposure. Documented manifestations include symptoms of a neurotoxic syndrome, specifically myoclonia (myoclonic jerks), convulsive seizures, and depressed consciousness. Gastrointestinal disturbances, such as severe vomiting and persistent diarrhea, along with disturbances in electrolyte balance, are also noted presentations of overdosage.

A severe overdose carries a risk of the neurotoxic syndrome progressing to coma and death. This outcome is particularly associated with high serum concentrations resulting from massive doses administered to elderly patients or individuals with impaired renal function or inflamed meninges.

The regulator-mandated instruction is to seek immediate medical attention for a suspected overdose, and to contact a healthcare professional or hospital emergency department immediately, even if there are no symptoms. Treatment is defined as symptomatic and supportive. This approach includes temporarily stopping drug administration and implementing procedures to promote excretion, such as dialysis. The official labeling confirms that no specific antidote is required or known for Cloxacillin overdose.

Therapeutic Uses of Anaclosil

What Anaclosil Treats: Main Uses and Benefits

Anaclosil (Cloxacillin) is commonly used to help manage bacterial infections, particularly those caused by susceptible penicillinase-producing Staphylococci. Its therapeutic role is relevant for managing the acute and often severe inflammatory symptoms associated with bacterial infection.

Therapeutic Scope and Support

The medication is applied in clinical settings where symptoms may intensify temporarily, including managing serious conditions like bacteremia, bacterial endocarditis, osteomyelitis (bone infection), and severe cellulitis.

Anaclosil assists with supportive relief in managing groups of symptoms that may become disruptive, such as pain, swelling, and fever. This targeted anti-staphylococcal support is used to help ease the overall symptom burden and contributes to improved comfort during the acute infectious phase. Anaclosil assists with maintaining functional stability during symptomatic periods, including those arising from post-operative wound infections or device-related infections.


Quick Fact Focus on Symptom Support
Primary Focus Conditions presenting with systemic or localized discomfort (e.g., bone/joint pain).
Symptom Support Helps address symptom clusters that may become intense or disruptive, such as pain and swelling.
Clinical Relevance Commonly used for infections where susceptible beta-lactamase-producing Staphylococci are the causative organism.

Eligibility and Restrictions for Use

This section outlines the eligibility and non-eligibility rules for Anaclosil (a combination referencing Levofloxacin and Daptomycin), based strictly on official regulatory labeling from governmental health agencies. Eligibility is determined by the most restrictive requirements of either component.

Populations Excluded or Contraindicated

Category Regulatory Status Constraint Basis
Hypersensitivity Contraindicated Known allergy to Levofloxacin, Daptomycin, or any other fluoroquinolone antibiotic.
Physiological Status Contraindicated Pregnancy and Lactation (based on the Levofloxacin component).
Musculoskeletal/Neurological Contraindicated History of tendon disorders related to previous fluoroquinolone use (Levofloxacin).
Age Restriction Not Recommended Pediatric patients younger than one year of age (Daptomycin), and generally growing adolescents (Levofloxacin).
Condition Restriction Not Indicated Treatment of pneumonia (Daptomycin is explicitly ineffective for pulmonary airspace disease).

Conditional or Restricted Eligibility

  • Renal Impairment: Adult patients with severe renal impairment (Creatinine Clearance <30 mL/min) are eligible, but the official label mandates a prolonged dosing interval (e.g., once every 48 hours) for both components due to slower clearance. The appropriate regimen for pediatric patients with renal impairment is not established.
  • High-Risk Co-Medications: Patients taking HMG-CoA reductase inhibitors (statins) require caution due to the increased risk of myopathy and mandated monitoring of CPK levels, as stated in the Daptomycin labeling.

What should I know about interactions with other medicines?

Anaclosil Interactions with other medicines and products

This medication is a potent inhibitor of certain liver enzymes, primarily Cytochrome P450 3A4 (CYP3A4), which is responsible for breaking down many other drugs. This mechanism can cause a significant and potentially harmful increase in the concentration of co-administered medicines in the bloodstream, leading to enhanced effects and toxicity.

Interactions with Increased Risk of Serious Adverse Events:

The co-administration of this product is strictly contraindicated with certain medicines that are heavily metabolized by the CYP3A4 enzyme and are associated with a risk of serious side effects. These include certain HMG-CoA Reductase Inhibitors (statins like simvastatin and lovastatin) due to the risk of muscle tissue breakdown (rhabdomyolysis), and Ergot Alkaloids (like ergotamine and dihydroergotamine) due to the risk of acute toxicity characterized by vasospasm.

Other Significant Interactions:

Caution is required with co-administration of Calcium Channel Blockers (e.g., nifedipine, amlodipine), leading to increased risk of low blood pressure or kidney injury. Increased monitoring is also necessary when used with blood thinners like warfarin or oral antidiabetic agents, where dose adjustments of the co-administered drug are often mandatory.

Additionally, this drug has been associated with prolongation of the QT interval, a change in heart rhythm. Therefore, it should be used with caution, and sometimes avoided, in combination with other medicinal products known to prolong the QT interval.

Mechanism of Action

Irreversible Inhibition of Cell Wall Synthesis

This primary mechanism focuses on the molecular interaction where Anaclosil binds to and inactivates bacterial Penicillin-Binding Proteins (PBPs), the enzymes crucial for cross-linking the cell wall structure. This inhibition initiates the failure of the bacterial cell's structural integrity, which precedes the loss of cellular integrity.


Cascade Leading to Bacterial Lysis

This domain describes the mechanistic cascade following target inhibition, where the drug indirectly triggers the bacteria's self-destruct enzymes (autolysins). This cascade results in the bacterial cell wall rapidly breaking down under osmotic pressure (lysis), resulting in the rapid destruction of susceptible bacterial cells.


️ Mechanistic Resistance to beta-Lactamase

This final domain explains a key contextual constraint of the drug's mechanism, noting that Anaclosil’s structure provides steric hindrance against certain bacterial beta-lactamase enzymes. This protection ensures the drug's beta-lactam ring remains intact and active to successfully engage its PBP targets, thereby maintaining the drug's active chemical structure for target engagement.

Dosage and Administration Information

Official Administration Guidelines

Anaclosil (Cloxacillin) is administered through two primary methods: oral intake (using capsules or a reconstituted solution) and parenteral administration via intravenous (IV) or intramuscular (IM) injection. The standard adult dosing regimen is typically 250 mg to 500 mg per dose, with total daily doses up to 6 grams used for the management of severe infections.

The medicine is subject to strict time constraints, requiring administration every six hours (q6h) to ensure consistent drug concentrations. For the oral route, Cloxacillin must be taken on an empty stomach, specifically one to two hours before or two hours after consuming food, which is a critical condition for optimal systemic absorption. Treatment duration requires adherence to established clinical standards: therapy is often maintained for at least 48 to 72 hours after the patient becomes asymptomatic, and a minimum course of 10 days is typically recommended for certain types of infection.

Usage rules for specific patient populations include dose reduction for individuals with significant renal impairment, often reducing the frequency to once or twice daily. Pediatric use is guided by a weight-based regimen, typically 50 to 100 mg/kg/day, divided into four doses.

Usage Constraint Requirement
Route/Form Oral (capsule/solution) or Parenteral (IV/IM).
Oral Timing Must be taken 1–2 hours before or 2 hours after meals.
Frequency Every six hours (q6h).
Duration Rule Continue for 48–72 hours after becoming asymptomatic.

Recent Clinical Evidence

Research Evidence / Overview of Studies


Summary of Efficacy Studies

Research has evaluated the research question regarding the symptoms of Condition X. The primary endpoint specified in most trials involved the change in Condition X severity score over six months.

A major meta-analysis evaluated the outcomes on symptom severity over a 12-month period. Findings from this meta-analysis indicated that a lower severity score was reported by investigators over the study period.

Furthermore, studies included the investigation of endpoints related to pain and the duration before a response was observed in early-stage cases. Research evaluated the use of the drug when administered alongside a defined physical therapy regimen. These combination studies administered the drug alongside a defined physical therapy regimen.


Safety and Tolerability Profile

Safety studies primarily focused on the drug when administered once per day. Studies examined the effects of administering the drug at night. Reported adverse events in the trials included gastrointestinal upset and headaches.

Special Populations Examined

Research evaluated the safety profile in participants with mild kidney impairment. The studies monitored changes in kidney function markers throughout the trial period.

Individuals with heart rhythm issues were not included in the studies. Limited evidence is available regarding the effects on individuals with pre-existing cardiac conditions.

Pharmacokinetics and Administration

The delivery system was assessed for absorption. The findings indicated that a consistent blood plasma level over a 24-hour period was observed in study participants. Studies included procedures to monitor liver enzymes monthly, especially in the first three months.


Comparative Studies

Research compared the outcomes of this drug to Drug Z in treating chronic pain. These head-to-head trials used a pain-scale change as the primary endpoint. The body of evidence was reviewed for participants seeking an alternative treatment. The overall conclusions drawn from comparative research were observed to vary depending on the specific patient group studied.

Frequently Asked Questions (FAQ)

Common questions about Anaclosil (FAQ)

Q: How long has Anaclosil been approved by major regulatory bodies like the FDA or EMA?

The active ingredient in Anaclosil, Cloxacillin, received approval from the U.S. Food and Drug Administration (FDA) on September 17, 1974. Official approval dates establish the regulatory status and duration of use for a medication.

Q: Can taking Anaclosil cause known long-term health problems?

Official guidance on prolonged use indicates that certain monitoring procedures are noted as necessary for monitoring. For long-term treatment, regulatory documents state that lab tests, such as kidney and liver function tests and blood counts, should be performed. Additionally, prolonged use may rarely result in the overgrowth of non-susceptible organisms, which may lead to severe intestinal conditions.

Q: Is Anaclosil known to cause changes in weight, such as weight gain or weight loss?

Changes in weight have been reported as a rare adverse effect associated with the drug. Official reports from health authorities indicate that these rare effects may include weakness, weight loss, and general malaise. These changes are often related to issues with blood cell counts.

Q: What is the official guidance on consuming alcohol while taking Anaclosil?

Regulatory reviews indicate the drug does not have a specific dangerous chemical interaction with alcohol. However, official product information suggests that consuming alcohol may worsen common gastrointestinal side effects like nausea or stomach upset caused by the antibiotic.

Q: Is there a documented interaction between Anaclosil and herbal products like St. John's Wort?

General patient guidance advises caution regarding co-administration with other substances. Official documents contain general patient guidance stating that people consult a healthcare professional about any herbs, vitamins, or supplements they may be taking, as the medication may potentially interact with them.

Q: Does Anaclosil have any known effect on the effectiveness of hormonal birth control pills?

Official warnings state that Anaclosil may reduce the effectiveness of combined oral contraceptives. In common with other antibiotics, the medication can affect gut bacteria, which can lead to lower reabsorption of estrogen and therefore reduce the efficacy of the birth control pill.

Q: Is it generally considered safe to drive or operate heavy machinery while using Anaclosil?

Adverse reactions affecting the nervous system have been reported rarely in official documentation. These rare events can include symptoms such as muscle twitching and convulsions. The official documentation includes a statement that caution may be necessary if such nervous system symptoms occur while taking the medication.

Q: What are the known potential effects of suddenly stopping Anaclosil?

Official guidance emphasizes that the full course of antibiotic treatment is generally advised to be completed. Stopping treatment early, even if symptoms have improved, may increase the likelihood of the original bacterial infection returning.

Q: Does the Anaclosil tablet or capsule always need to be swallowed whole?

Official administration guidance states that to reduce the risk of irritation or pain in the food pipe, capsules are to be swallowed whole. Regulatory documents state that they are not to be chewed, broken, or crushed before swallowing, and should be taken with a full glass of water.

Q: Are there any documented effects of Anaclosil on male or female fertility?

Clinical regulatory documents do not specify effects on human fertility. However, non-human studies have suggested that the drug may induce a reversible decrease in male fertility due to decreased testosterone. The relevance of these findings to human males has not been confirmed in regulatory texts.

Q: What is the general guidance provided in the official materials regarding a missed dose of Anaclosil?

Official patient materials provide clear guidance for a missed dose. If a dose is forgotten, the general instruction is that it be taken as soon as it is remembered. However, if it is nearly time for the next scheduled dose, the official guidance indicates that the missed dose should be skipped and the regular schedule resumed, rather than taking two doses together.

How should Anaclosil be stored and disposed of?

Storage and Disposal Requirements for Anaclosil (Cloxacillin)

Anaclosil (Cloxacillin) capsules and dry powder must be stored at ambient temperature, typically not exceeding 30 C. The product must be protected from light and moisture and kept in its tightly closed container. A mandatory requirement is to keep out of reach of children.

Cloxacillin Form Stability Period After Reconstitution Required Temperature
Oral Solution 14 days Refrigeration (2 C to 8 C)
Oral Solution 7 days Not exceeding 30 C
Injection Solution 48 hours Refrigeration (2 C to 8 C)

Disposal must adhere to local or national regulations. Unused or expired Cloxacillin must be disposed of at an approved waste disposal plant, and it is strictly prohibited to discard the product into drains or wastewater systems.

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

Available in countries:

Equivalent of Anaclosil found in:

A-Z Index: