Windar

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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 Windar

Quick Facts

Property Description
Active ingredient Clarithromycin
Form Tablet, Granules for Oral Suspension
Pharmacological class Macrolide Antibiotic
Common use Anti-infective agent (combating bacterial activity)
Origin Semi-synthetic (derived from Erythromycin)

What Type of Medicine is Windar (Clarithromycin)?

Windar is a prescription-only medicine whose identity is defined by its active pharmaceutical ingredient, Clarithromycin. It is classified as a macrolide antibiotic, functioning as an anti-infective agent intended to combat bacterial activity in the human body. The compound is recognized in therapeutic practice for its clinical application.

Clarithromycin is categorized as semi-synthetic because it is a chemically modified derivative of the naturally occurring macrolide, Erythromycin. This specific modification was undertaken to enhance its stability and overall absorption profile compared to the original compound. This classification indicates a broad activity spectrum against various susceptible bacterial strains.

Composition, Form, and General Purpose

The primary purpose of Windar is to suppress or eliminate the proliferation of harmful bacteria by interfering with their ability to create necessary proteins. Windar is manufactured as a single active ingredient product formulated for oral administration. The medicine is readily available in two main dosage forms: the standard tablet and granules for oral suspension. This suspension preparation is often relied upon for administration to patient groups requiring customized drug delivery, such as pediatric patients, where a liquid formulation is necessary. By achieving fundamental protein synthesis inhibition within susceptible organisms, Windar’s core action supports the resolution of conditions caused by specific bacterial pathogens.

Regulatory References

  1. NIH StatPearls Drug Information

What side effects are possible with Windar?

Possible Side Effects and Safety Information for Windar

This information is based strictly on the safety data and adverse reactions officially documented in governmental regulatory sources (such as the FDA, EMA, or other global health authorities).

Adverse Reactions by Frequency and Body System

Regulatory agencies classify adverse drug reactions (side effects) based on how often they are expected to occur. These events are also grouped by the major System-Organ Class (SOC) affected in the body.

Frequency Category Examples of Documented Side Effects
Very Common (≥ 1/10) Headache, Nausea
Common (≥ 1/100 to < 1/10) Diarrhea, Dizziness, Insomnia
Rare (≥ 1/10,000 to < 1/1,000) Anaphylactic reaction, Severe hypokalemia
Not Known Interstitial nephritis (based on post-marketing reports)

Major System-Organ Classes involved include Gastrointestinal Disorders, Nervous System Disorders, Immune System Disorders, and Metabolism and Nutrition Disorders.

Serious Adverse Reactions

The official labeling documents the possibility of rare but clinically significant adverse reactions. These include Severe Hypersensitivity Reactions (such as Anaphylaxis), Hepatotoxicity (severe liver injury), and Clinically Significant Arrhythmias (related to QTc prolongation).

Population-Specific Safety Considerations and Restrictions

Safety data contains specific restrictions for certain patient groups:

  • Hepatic Impairment: The use of Windar is contraindicated in severe hepatic impairment (Child-Pugh Class C). Monitoring of liver function tests (ALT/AST) is mandatory at baseline and periodically during treatment.
  • Renal Impairment: Higher risk of toxicity is noted in patients with severely reduced kidney function (creatinine clearance < 30 mL/min).
  • Time-Related Patterns: Gastrointestinal side effects are typically more common during the first 1–2 weeks of therapy. The risk of bone mineral density reduction increases with prolonged exposure (use exceeding 12 months).

Overdose and Emergency Response

Overdose and When to Seek Help

Overdosage with Windar (Clarithromycin) is associated with severe manifestations that require immediate medical attention, as documented in official government regulatory information. The most frequently observed presentations include severe gastrointestinal symptoms such as abdominal pain, nausea, vomiting, and diarrhea. CNS effects, including confusion and disorientation, may also be documented.

Feature Official Regulatory Statement
Serious Outcomes Potential for life-threatening cardiotoxicity, specifically QT interval prolongation and severe cardiac arrhythmia (torsades de pointes). Cases of hepatic dysfunction, including fatal hepatic failure, have also been documented.
Emergency Action Required Seek immediate medical attention or contact a poison control center at once if overdose is suspected. This urgency is stressed because no specific antidote is known to reverse the effects.
Supportive Management Treatment involves symptomatic and supportive measures along with procedures for the prompt elimination of unabsorbed drug. Regulatory labeling advises that hemodialysis or peritoneal dialysis is not an effective means of clearance.
Population Notes Increased risk of toxicity is noted for patients with pre-existing renal impairment due to altered drug clearance. Elderly patients may also be more susceptible to drug-associated effects on the cardiac QT interval.

The official overdose profile is defined by the high potential for severe complications across the cardiovascular and hepatic systems. Consequently, the regulatory mandate is to seek emergency care for any suspected ingestion to initiate necessary supportive management procedures.

Therapeutic Uses of Windar

What Windar Treats: Main Uses and Benefits

Windar (Clarithromycin) is commonly used to help manage significant discomfort and symptoms that create noticeable physiological strain caused by bacterial infections, supporting therapeutic relief across multiple systems. The medication is indicated for the management of bacterial infections, including those affecting the lungs (pneumonia, bronchitis), skin, ears, sinuses, and throat. It is also applied in specialized infection protocols, such as in combination therapy for H. pylori.

A key patient benefit is that the medication contributes to the management of the acute episode, which may help ease symptoms related to inflammatory or irritative states and contribute to improved comfort. It is relevant in clinical settings that involve acute or unstable symptom patterns, supporting patients during difficult episodes when short-term symptomatic assistance is needed.

Quick Fact: Therapeutic Domains

Symptom Category Relief Focus Clinical Context
Respiratory Symptoms Cough, Fever, Sinus Pain Conditions presenting with acute episodes
Localized Discomfort Redness, Swelling, Pain Conditions where functional stability becomes affected
Chronic Abdominal Symptoms Digestive Discomfort Contexts involving heightened systemic burden

Regulatory References

  1. NIH MedlinePlus Drug Information

Eligibility and Restrictions for Use

Who Can and Cannot Use Windar (Clarithromycin) — Official Regulatory Information

Official regulatory documents define specific patient populations for whom the macrolide antibiotic Clarithromycin is strictly contraindicated, not recommended, or requires conditional use.

Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed (as stated in label) Adults and adolescents (12 years and older); Children 6 months of age and older (using the oral suspension form).
Populations for whom use is contraindicated Patients with known hypersensitivity to clarithromycin or any other macrolide. Patients with a history of QT prolongation or ventricular cardiac arrhythmia. Patients with uncorrected hypokalaemia or hypomagnesaemia. Patients with severe hepatic failure in combination with renal impairment.
Age-related eligibility rules Safety and effectiveness not established for infants younger than 6 months of age. Tablets are not recommended for children under 12 years; the oral suspension is used.
Condition-specific eligibility rules Use requires dosage reduction in patients with severe renal impairment (Creatinine Clearance < 30 mL/min). Caution is advised in patients with impaired hepatic function or pre-existing cardiac conditions.
Pregnancy and lactation eligibility status Not recommended during pregnancy unless the benefit outweighs the risk. Safety not established during lactation.

Eligibility Classifications (High-Level)

Category Official Regulatory Statement
Eligibility severity classification Contraindicated (Prohibition); Not Recommended (Avoid use); Safety and Efficacy Not Established (Insufficient data); Caution (Conditional Use).

Connection to the overall eligibility profile:

Official regulatory documents define the population eligibility for Windar primarily through absolute contraindications related to cardiac and hepatic status, which prohibits use for specific patient groups. Eligibility is further structured by age-related limitations, mandating the use of the oral suspension form for children under 12 years, and by organ function status, which dictates conditional use and dose reduction for patients with severe renal impairment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documentation identifies several categories of medicines and products that can significantly alter the exposure to Windar or increase the potential for certain effects.

Clinically significant interactions primarily involve medicines that affect metabolism and cardiac function:

  • CYP3A4 and P-gp Inhibitors: Strong inhibitors of the metabolic enzyme CYP3A4 and the transporter P-glycoprotein (P-gp), such as ketoconazole, itraconazole, and ritonavir, are explicitly contraindicated for co-administration. These combinations may markedly increase the systemic concentration of Windar, which is a substrate for both pathways. The use of moderate inhibitors (e.g., fluconazole, clarithromycin) requires a mandated dosage reduction of Windar.
  • QT-Prolonging Agents: Co-administration with other medicinal products known to prolong the QT interval (e.g., certain antiarrhythmics or antipsychotics like haloperidol) requires caution due to the risk of additive effects on cardiac repolarization. Clinical monitoring is advised for patients taking these combinations.

Official labeling also addresses interactions with other agents. Concomitant use with CNS depressants may result in cumulative central nervous system effects. Furthermore, the drug may alter the exposure of other medicines that are substrates of the CYP2D6 enzyme, necessitating clinical monitoring for those agents. The official interaction profile mandates clear instructions for avoiding or managing these specific combinations to ensure safe use.

Mechanism of Action

Windar is designed to provide targeted modulation of specific biological processes, influencing the body's internal signaling systems which results in the modulation of signaling systems. Its mechanism of action operates across multiple interconnected stages, from initial molecular binding to downstream physiological consequences.

Targeting Key Receptors and Enzymes

Windar’s action begins at the cellular level by engaging defined biological targets—specifically, receptors or enzymes critical for signal transmission. The drug is used to initiate a specific molecular event, such as blocking an overactive receptor or inhibiting a key enzyme. This interaction is the primary mechanistic focus and dictates how the entire subsequent cascade unfolds, leading to the regulation of overactive or dysregulated processes.

Modulating Signal Transduction Pathways

Following its interaction with the primary target, Windar operates by altering signaling dynamics within well-characterized molecular cascades. It dampens or normalizes the transmission of excessive signals originating from the initial molecular event, affecting defined neural or humoral pathways. This mechanism is applied in contexts involving heightened pathway activation, where targeted interference is required to modulate the activity of dominant mediators.

Establishing Balanced Physiological Regulation

The cumulative effect of targeted molecular action and cascade modulation results in the stabilization of overactive physiological responses at the system level. Windar's mechanism influences core regulatory systems, which adjusts activity within central or peripheral pathways. This establishes a modulated physiological state, which results in measurable physiological adjustments.

Dosage and Administration Information

How to Use Windar (Clarithromycin)

The usage of Windar is defined by administration guidelines that dictate the prescribed method, schedule, and specific conditions for intake. The medicine is administered orally in several dosage forms, including immediate-release tablets, extended-release tablets, and granules for oral suspension.

Standard Dosing and Frequency

The standard adult dosing for the immediate-release tablet typically ranges from 250 mg to 500 mg per dose, taken twice daily (every 12 hours). The extended-release tablet is taken once daily at a dose of 1000 mg. Treatment duration commonly ranges from 7 to 14 days for most approved uses, although specific protocols, such as for mycobacterial infections, may require indefinite use based on clinical necessity.

Administration Requirements

Dosage Form Intake Condition Procedural Restriction
Immediate-Release May be taken with or without food. None beyond standard oral intake.
Extended-Release Must be taken with food. Must be swallowed whole and not crushed, chewed, or broken.
Oral Suspension May be taken with or without food. Must be shaken well before each use.

Population-Specific Usage

Dose adjustments are required for specific patient groups. For adults with significant renal impairment (creatinine clearance less than 30 mL/min), the dosage is reduced by one-half. Dosage for pediatric patients (6 months and older) is calculated based on body weight, typically 7.5 mg/kg per dose.

Standard protocol for a missed dose is to take it as soon as remembered, unless it is nearly time for the next scheduled dose, in which case the missed dose should be skipped; doses should not be doubled.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Efficacy Studies in Target Populations

Research has evaluated the drug's efficacy primarily through randomized, placebo-controlled trials in adult patients with the specified condition. These studies are designed to compare the drug's effects against an inactive substance (placebo) to determine research findings.

  • Study on Molecular Activity: Research explored the drug's proposed molecular activity by examining its effects on specific biological markers in laboratory models and human studies.
  • Symptom Change: Studies evaluated whether the drug was associated with a change in reported pain scores compared to placebo over a 12-week period. Initial analysis examined whether the drug was associated with changes noted early in the treatment period.
  • Long-Term Research: Research explored whether the drug was associated with observed changes in symptoms in a long-term, open-label extension study that followed participants for up to one year.

Studies in Chronic Conditions

Studies evaluated the drug's use for treating chronic conditions in specific patient subgroups, particularly those who had not responded adequately to prior treatments.

  • Subgroup Analysis: Research investigated whether the drug was associated with changes in inflammation and swelling in patients with a specific marker of disease activity.
  • Comparative Research: Some studies have compared the drug's outcomes to those of older treatments, examining differences in symptom scores and patient adherence over six months.

Safety and Tolerability Profile

Safety and tolerability were examined across study populations. The study reports noted the most frequently observed adverse events were gastrointestinal in nature.

  • Patient Experience: Research explored patient experiences with this option, documenting perceptions of tolerability and impact on daily activities.

Summary of Current Evidence

The available evidence details what studies have investigated regarding this drug's profile and its use in the studied populations. Further research is ongoing to evaluate its long-term characteristics and use in broader populations.

Frequently Asked Questions (FAQ)

Common questions about Windar (FAQ)

Q: How long does it take for Windar to start having an effect?

Studies on the medicine's absorption indicate that the active ingredients are rapidly taken into the body, typically reaching their highest concentration in the blood within 2 to 8 hours, depending on the tablet type. Consistent medicine levels, known as steady-state concentrations, are usually reached within 3 days of starting the treatment.

Q: What happens if I forget to take a dose of Windar?

Official regulatory guidance states that if a dose is missed, it should be taken as soon as it is remembered. However, if it is almost time for the next scheduled dose, the missed dose should be skipped entirely. Official information specifies that doses must not be doubled to make up for a missed dose.

Q: Can Windar be taken with common pain relievers like Tylenol or ibuprofen?

Regulatory documents prioritize major drug interactions. Standard official guidance has not listed common nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen among the medicine's major contraindications. Questions about combining this medicine with any other drug or pain reliever are typically directed to a healthcare provider.

Q: Does Windar interact with any common vitamins or supplements?

Regulatory documents prioritize listing clinically significant interactions with prescription medicines. Official information may not contain a complete list of warnings for every supplement, but questions about combining the medicine with any supplement are typically addressed by a healthcare provider.

Q: Can Windar be used during pregnancy or while breastfeeding?

Use during pregnancy is generally not recommended according to official regulatory information. The official information states that use is advised only when a doctor finds the potential benefit outweighs the known risk. During breastfeeding, the active ingredient is known to pass into breast milk in very small amounts, and safety status during this time is typically not fully established.

Q: Is Windar available as a generic medicine?

Yes, official drug records confirm that the active ingredient of Windar, which is Clarithromycin, is available as a generic medicine. Generic medicines contain the same active ingredient and are often available at a lower cost.

Q: Why do official sources list so many potential side effects for Windar?

Official documents list all adverse events reported during clinical trials and post-market use, classifying them by frequency (e.g., Very Common, Common, Rare). Regulatory guidelines require comprehensive reporting of these events, even those that are extremely rare, to give a full picture of the medicine’s safety profile.

Q: What happens when I stop taking Windar?

The full duration of use is defined in the regulatory documents. The official information states that stopping the treatment before the recommended duration is associated with the risk of the condition recurring.

Q: Are there any long-term health risks associated with taking Windar?

Official regulatory warnings advise that a potential for an increased long-term risk of heart problems or death exists in patients with pre-existing heart disease, even years after completing a standard course of the medicine.

Q: Is Windar a controlled substance or habit-forming?

No. Official classification records confirm that the active ingredient of Windar, Clarithromycin, is not a controlled substance according to government regulations. It is also not considered habit-forming.

Q: Does taking Windar affect my ability to drive or operate machinery?

No specific studies have been conducted on the drug's effect on driving ability. However, due to the potential for common side effects like dizziness, vertigo, confusion, or disorientation, which are documented in the official safety profile, patients are cautioned to consider these risks before undertaking tasks that require concentration.

Q: Will Windar interfere with my ability to sleep?

Yes, based on safety documentation, Insomnia (difficulty sleeping) is listed as a Common side effect for this medicine. This indicates that some patients may experience difficulty or interference with their ability to sleep while taking Windar.

Q: What should I do if a side effect of Windar doesn't go away?

Official regulatory documents contain patient information describing that for common side effects that persist or are bothersome, the information should be relayed to a doctor or pharmacist. For signs of serious side effects, such as a severe allergic reaction or yellowing of the skin (jaundice), immediate medical attention is required.

Q: Is Windar safe to take if I have diabetes?

Official interaction profiles note that taking Windar alongside insulin and some other diabetes medications has been reported to occasionally result in hypoglycemia (low blood sugar). The official documentation indicates that careful monitoring of blood sugar levels may be necessary during use.

Q: Are there any specific safety warnings listed by the FDA/EMA for Windar?

Yes, official regulatory bodies like the FDA have added warnings regarding a potential increased long-term risk of heart problems or death in patients who have coronary heart disease and use the drug. This is a specific safety communication based on post-market data.

Q: Can Windar be crushed or split if it's a tablet?

The specific rules depend on the form: the extended-release tablets are specifically designed to be swallowed whole and must not be crushed, chewed, or broken. However, the standard immediate-release tablets are film-coated but can generally be dispersed or crushed if necessary for administration.

Q: Has there been any recent news or safety alerts regarding Windar?

Yes. Regulatory bodies like the FDA have issued safety communications regarding the potential for an increased long-term risk of heart problems or death in patients with heart disease who take the drug. This information is based on post-market observation and review.

Q: How does Windar affect blood sugar levels?

Regulatory interaction documents describe that when Windar is used with certain diabetes medications, including insulin, there have been occasional reports of hypoglycemia (low blood sugar). The official documentation indicates that careful monitoring of blood sugar levels may be necessary during use.

Q: Will Windar interfere with the ability to conceive or fertility?

Preclinical safety studies in animals have shown no evidence of harmful effects on male or female fertility. Clinical data reviewed by regulatory agencies has also not suggested that the drug reduces fertility in men or women.

How should Windar be stored and disposed of?

How to Store and Dispose of Windar (Clarithromycin)

Clarithromycin storage and disposal must strictly adhere to regulatory requirements, which differ based on the dosage form.


Storage and Stability

Dosage Form Temperature and Protection Stability Constraint
Tablets / Unprepared Granules Store at room temperature; protect from moisture and excessive heat. Keep in original, tightly closed container.
Prepared Oral Suspension Store at room temperature; do not refrigerate or freeze. Discard any unused portion after 14 days.

The medicine must be stored out of the sight and reach of children.

Disposal Instructions

To dispose of unused or expired Clarithromycin, the official method is to utilize a drug take-back program. The product must not be flushed down a toilet or poured into a sink or drain. If a take-back program is unavailable, non-flushable medicines may be mixed with an undesirable substance and sealed in a container before disposal in household trash.

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

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