Калетра

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Калетра

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Treatment option: Immunodeficiency, Infection

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Overview of Калетра

Quick Facts

Property Description
Active Ingredients Lopinavir, Ritonavir
Form Film-coated tablet, Oral solution
Pharmacological Class Antiretroviral agent / Protease Inhibitor (PI)
Type Fixed-Dose Combination (FDC)
Origin Synthetic

Defining Lopinavir/Ritonavir: A Fixed-Dose Antiretroviral Agent

Lopinavir/Ritonavir is a specialized, prescription-only medicine that belongs to the class of Antiretroviral agents. This synthetic drug is fundamentally an HIV-1 Protease Inhibitor (PI), and it is used as a critical component of Antiviral therapy in the management of Retroviral infections.

The drug entity is classified as a PI because it targets a specific viral enzyme necessary for the assembly of new virus particles, representing a cornerstone strategy within Highly Active Antiretroviral Therapy (HAART). Lopinavir/Ritonavir is an essential agent in this therapeutic approach. This Fixed-dose combination (FDC) medicine is a crucial tool for long-term viral suppression. It is widely known by the brand names Kaletra and Aluvia in various global markets.


Composition and The Booster Principle

The medication is defined by its two distinct Active ingredients: Lopinavir and Ritonavir, and it is primarily administered via the oral route as a film-coated tablet or an oral solution.

The purpose of combining these two Active ingredients in one preparation is synergistic. Lopinavir is the key Enzyme inhibitor responsible for suppressing viral activity, while Ritonavir is included in a low dose to act as a Pharmacokinetic booster. This combination serves as a Fixed-Dose Combination (FDC) for the treatment of HIV infection. The drug's dual PI and boosting action offers a key differentiation point from older, single-agent PI regimens. Lopinavir achieves Inhibition of viral replication by blocking the viral enzyme, and Ritonavir ensures this action is effective by inhibiting human liver enzymes that would otherwise metabolize the drug too quickly, thereby ensuring Lopinavir remains at potent levels.

Regulatory References

  1. WHO Essential Medicines List (EML)
  2. WHO Essential Medicines List
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What side effects are possible with Калетра?

Possible Side Effects and Safety Information

The official safety profile for Lopinavir/Ritonavir is structured by classifying documented adverse reactions based on reported frequency and the physiological systems affected, according to regulatory standards from authorities such as the FDA and EMA.

Frequency-Classified Adverse Reactions

Adverse reactions are formally grouped into categories based on occurrence rates documented in clinical use:

  • Very Common: Effects reported in this category include Diarrhoea and Hyperlipidaemia (high levels of fat/lipids in the blood).
  • Common: Reactions include Nausea, Vomiting, Abdominal Pain (upper/lower), and Insomnia.
  • Uncommon: Events reported in this tier include Pancreatitis and Hepatitis.

System-Organ Class and Serious Reactions

The documented effects primarily involve Gastrointestinal disorders and Metabolism and nutrition disorders. Furthermore, official regulatory documents highlight specific Serious Adverse Reactions due to their clinical significance:

  • Serious Hepatic Events: These include rare cases of hepatic decompensation, especially in individuals with pre-existing liver disease.
  • Immune Reconstitution Inflammatory Syndrome (IRIS): This syndrome is officially noted as a potential occurrence during the initial phase of combination antiretroviral treatment.
  • Lactic Acidosis: This is recognized as a rare, potentially life-threatening event.

Population and Duration-Related Safety Notes

The official safety documentation defines specific considerations for certain patient groups and exposure patterns:

  • Hepatic Impairment: The medication is not recommended for use in patients with severe hepatic impairment due to the risk of liver toxicity.
  • Cardiac Considerations: Caution is formally noted for patients with pre-existing cardiac conditions due to the potential for PR interval prolongation.
  • Long-Term Exposure: Changes in the distribution of body fat, known as Lipodystrophy, are a documented safety pattern associated with prolonged use of this class of medicine.
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Overdose and Emergency Response

Overdose with Lopinavir/Ritonavir may present as an exaggeration of known adverse effects, alongside specific severe outcomes requiring urgent attention. Officially documented clinical manifestations include symptoms of CNS depression (such as stupor, coma, or apnea), seizures, and hypotonia. Cardiovascular risks noted in regulatory documents include cardiac arrhythmias and ECG changes, such as PR interval prolongation, which has been associated with reports of second and third degree heart block. A massive overdose is officially linked to the potential for cardiogenic shock.

The most critical documented overdose risk is specific to the oral solution. Due to its alcohol and propylene glycol content, it carries an official warning of severe or possibly fatal toxicity in preterm neonates and infants under 14 days of age. This toxicity involves hyperosmolality, renal toxicity, and life-threatening cardiac or respiratory problems, necessitating immediate discontinuation of the drug.

For all suspected overdoses, the regulatory mandate is to seek immediate medical attention or contact a poison control center right away. Management is based on general supportive measures and may include the use of activated charcoal. The regulatory profile notes that no specific antidote is known for the active ingredients, which confirms management as purely symptomatic and supportive.

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Therapeutic Uses of Калетра

What Калетра Treats: Main Uses and Benefits

The primary and official therapeutic domain of this medication is the treatment of Human Immunodeficiency Virus (HIV-1) infection. This combination is commonly used as part of combination Antiretroviral Therapy (ART) to manage the underlying condition. The therapeutic goal is to help achieve virological suppression, which means significantly decreasing the amount of HIV (the viral load) in the blood. This control is applied in clinical settings across various patient groups, including those starting therapy for the first time, those with drug resistance, and pediatric patients.

A major benefit is that the medication supports the recovery of the body’s immune system (systemic imbalance). By helping to control the virus, the drug assists with managing the symptoms associated with progressive immune deterioration. This benefit helps patients cope more steadily with symptom fluctuations and can support the development of a more stable immune state.

For pregnant patients with HIV, its effective use in achieving viral suppression provides the practical benefit of assisting with reducing the risk of transmitting the virus to the newborn (perinatal transmission).


Quick Fact: Relief for Systemic Imbalance

Domain of Use Key Benefit Clinical Context
HIV-1 Infection Supports sustained virological suppression Used in ART-naïve and experienced patients
Immune Decline Helps manage symptoms associated with immune deterioration Relevant for pediatric and adult populations
Transmission Risk Assists with reducing perinatal transmission risk Relevant in pregnant patients with active HIV-1
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Eligibility and Restrictions for Use

Official Eligibility and Non-Eligibility Status

This section outlines the population eligibility rules for Lopinavir/Ritonavir (Kaletra) as strictly defined by regulatory authorities.


Classification Regulatory Status
Populations for whom use is allowed Adults and pediatric patients aged 14 days and older
Populations for whom use is contraindicated Patients with severe hepatic insufficiency or known hypersensitivity to the ingredients. Patients taking certain drugs highly dependent on CYP3A for clearance (e.g., amiodarone, simvastatin) that may cause life-threatening reactions.
Populations for whom use is not recommended Lactating patients (breastfeeding). Neonates before a postmenstrual age of 42 weeks and postnatal age of 14 days. Pediatric patients for once-daily administration.

Age and Condition-Based Eligibility

The medicine is indicated for use in both adults and children, setting the minimum eligibility age at 14 days for the oral solution. Caution is advised for older adults (65 years and older) due to the greater frequency of reduced organ function.

Patients with mild-to-moderate hepatic impairment are eligible but require caution. Use is not recommended for women who are breastfeeding due to potential risks to the infant. Conditional use restrictions apply to patients with pre-existing cardiac conditions, where the official label advises caution due to potential PR and QT interval changes.

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What should I know about interactions with other medicines?

Kaletra (lopinavir/ritonavir) is a potent inhibitor of the metabolic enzyme Cytochrome P450 3A (CYP3A), primarily due to the ritonavir component. Co-administration can significantly increase the plasma concentrations of other medicines that are predominantly cleared by CYP3A, potentially resulting in serious or life-threatening events. Conversely, medicines that are potent CYP3A inducers can significantly reduce lopinavir plasma concentrations, which risks the loss of antiviral effectiveness and the development of drug resistance.


Key Interaction Categories

Classification Example Medicine/Class Interaction Rationale
Contraindicated Antiarrhythmics (e.g., Amiodarone, Dronedarone); Ergot Derivatives (e.g., Ergotamine); HMG Co-A Reductase Inhibitors (e.g., Lovastatin, Simvastatin); Sedatives/Hypnotics (e.g., Oral Midazolam, Triazolam); Herbal Products (e.g., St. John's Wort); Antipsychotics (e.g., Quetiapine) Risk of serious toxicity due to increased drug levels, or risk of loss of Kaletra efficacy.
Dose Adjustment Needed Certain Anticonvulsants (e.g., Carbamazepine, Phenytoin); Non-nucleoside Reverse Transcriptase Inhibitors (e.g., Efavirenz, Nevirapine) May require an increase in the Kaletra dose or a restriction on once-daily Kaletra dosing.
Use with Caution Drugs that prolong the PR or QT interval (e.g., Amiodarone); PDE5 inhibitors (e.g., Sildenafil, Tadalafil); Colchicine Requires close monitoring and/or dose reduction of the co-administered drug due to increased exposure and risk of adverse effects.
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Mechanism of Action

How Калетра Works

The mechanism of Калетра (Lopinavir/Ritonavir) is a specific, dual-component action designed to disrupt the life cycle of the Human Immunodeficiency Virus type 1 (HIV-1). This involves the inhibition of a critical viral enzyme, which is sustained and optimized by the suppression of the drug's metabolism.

Targeted Disruption of Viral Maturation

The core mechanism of Lopinavir involves binding directly to and inhibiting HIV-1 Protease, a viral enzyme required for processing polyproteins into functional units. By blocking the protease's ability to cleave precursor polyproteins, this action results in the formation of defective, non-infectious virions, thereby disrupting the ability of the virus to complete assembly and mature.

Pharmacodynamic Enhancement Through Metabolic Shielding

Ritonavir's distinct action in the fixed-dose combination is to act as a metabolic shield. It potently inhibits the human liver enzyme CYP3A4, which is the primary route for Lopinavir's breakdown. This strategic inhibition ensures that Lopinavir achieves and maintains high, stable concentrations in the bloodstream, ensuring effective and sustained inhibitory engagement with the viral protease target.

Systemic Consequence: Modulation of Immunological Parameters

The sustained production of only non-infectious virus particles leads to a continuous reduction in the circulating active virus (viral suppression). This physiological change reduces the rate of destruction of CD4^+ T-lymphocytes, resulting in a progressive increase in CD4^+ T-cell count over time.

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Dosage and Administration Information

How to Use Lopinavir/Ritonavir (Калетра): Official Administration Guidelines

Lopinavir/Ritonavir is administered orally and is intended for long-term, continuous use as part of a combination antiretroviral regimen. The instructions for proper use are strictly detailed to ensure correct absorption and drug levels. These guidelines define the approved dosage forms, intake conditions, and standard schedules, which must be followed precisely as prescribed by a physician experienced in treating HIV infection.

Standard Dosage and Frequency

Regimen Lopinavir/Ritonavir Dose Frequency Administration Route
Standard Adult Dose 400 mg / 100 mg Twice Daily (BID) Oral (Tablet or Solution)
Alternative Adult Dose 800 mg / 200 mg Once Daily (QD) Oral (Tablet or Solution)
  • The Once Daily regimen is not recommended for all adult patients, including those who are pregnant or those receiving certain co-medications.

Conditions for Administration

  • Film-coated tablets (200 mg / 50 mg and 100 mg / 25 mg strengths) may be taken with or without food. They must be swallowed whole and should not be chewed, broken, or crushed.
  • The Oral Solution (80 mg / 20 mg per mL) must be taken with food.
  • Pediatric Dosing is typically twice daily and calculated based on Body Surface Area (BSA) or body weight to ensure accurate dosing for children and adolescents.
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Recent Clinical Evidence

Research Evidence / Overview of Studies for Lopinavir/Ritonavir

Evidence for Use in Human Immunodeficiency Virus (HIV-1) Infection

Research examining Lopinavir/Ritonavir, combined with other medicines, was studied for its potential use in combination therapy for chronic HIV-1 infection. This framework of evidence, largely composed of Randomized Controlled Trials (RCTs), outlines studies that measured virological suppression (plasma HIV-1 RNA levels) and the counts of CD4 immune cells in both treatment-naïve and treatment-experienced adult populations. Studies monitored how viral suppression was maintained over defined time intervals and examined the development of new resistance in previously treated patients.

Evidence in Special Populations

Research describes that studies monitored markers like viral load and CD4 cell counts in pediatric patients (children and adolescents). For pregnant patients with HIV-1, research was studied for its potential to suppress the mother’s viral load in research exploring the risk of perinatal transmission. Results apply only to the specific populations studied. Studies note limitations such as modest sample sizes compared to adult trials.

Long-Term Studies and Durability of Response

Studies monitored patients for time intervals ranging up to over three years to assess the durability of virological outcomes. During these observational periods, research also examined outcomes related to metabolic health, specifically monitoring indicators such as lipid (cholesterol, triglycerides) and glucose levels. Long-term outcomes are not fully established, and data for these metabolic changes remain limited.

Research in Investigational Contexts (COVID-19)

During the COVID-19 pandemic, this combination was studied for its potential as an antiviral in patients hospitalized with SARS-CoV-2 infection (COVID-19). Large, international RCTs examined outcomes like the 28-day mortality rate and the need for invasive mechanical ventilation. Research describing these trials reports that the use of Lopinavir/Ritonavir was observed in some studies not to meet the primary outcome endpoints compared to standard care for hospitalized COVID-19 patients.

Key Studies & References

  1. Lopinavir-ritonavir is not an effective treatment for patients hospitalised with COVID-19 (RECOVERY Trial statement)
  2. Assessing the Efficacy of Lopinavir/Ritonavir-Based Preferred and Alternative Second-Line Regimens in HIV-Infected Patients: A Meta-Analysis
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Frequently Asked Questions (FAQ)

Common questions about Калетра (FAQ)


Q: What should I do if I miss a dose of Калетра?

A: Official administration information states that if a dose is missed, it should be taken as soon as a dose is remembered. However, if it is almost time for the next scheduled dose, the regulatory guidance is to skip the missed dose entirely and resume the normal schedule. Official guidance advises against taking a double dose to compensate for a missed dose.

Q: Is it common to feel tired when taking Калетра?

A: While tiredness is not one of the most frequently classified reactions, official documentation does note that feeling weak or tired is among the additional possible side effects that may occur in some patients. Safety information structures adverse reactions based on how often they were reported in clinical studies or use.

Q: Is it safe to drink alcohol in moderation while taking Калетра?

A: It is important to note that the oral solution formulation of the medication contains a significant amount of alcohol (42.4% by volume) as an inactive ingredient. For this reason, official guidance notes that the use of the oral solution in children and other patient groups requires caution due to the alcohol content. The product label does not typically provide specific recommendations regarding the consumption of external alcoholic beverages.

Q: Is there an age limit for taking Калетра?

A: Official prescribing information indicates that the medicine is approved for use in adults and in pediatric patients as young as 14 days old. While a specific upper age limit is not defined, official labels generally advise caution for older adults (65 years and older) due to the greater frequency of decreased natural organ function in that population.

Q: What happens if I stop taking Калетра suddenly?

A: Regulatory documents strongly emphasize the importance of adherence, which means consistently taking the medication as prescribed. Disrupting the regimen is described as risking the loss of viral suppression and potentially leading to the development of drug resistance. Any change to the regimen, including stopping treatment, is a clinical decision and should be guided by a treating physician.

Q: Has Калетра been studied for uses other than its main approval?

A: Yes, regulatory authorities have noted that the drug has been studied in investigational contexts beyond its main use for HIV-1 infection. For instance, during the COVID-19 pandemic, the combination was researched as a potential antiviral treatment for patients hospitalized with SARS-CoV-2 infection, although official authorization for that use was not widely adopted.

Q: What is the general duration of treatment with Калетра?

A: The medication is intended for long-term, continuous use as a component of combination antiretroviral therapy for chronic HIV infection. The total duration of treatment is guided by clinical assessments, as it is used for chronic conditions.

Q: Are there different doses of Калетра, and how is that described in official documents?

A: Official documents define different dosing regimens for adults, including a Twice Daily and a Once Daily option. The Once Daily regimen is subject to restrictions and is not recommended for all patients, such as those with certain characteristics of viral resistance or those taking specific co-medications.

Q: Does Калетра cause weight changes?

A: Regulatory safety information indicates that prolonged use of this class of medicine is associated with the redistribution or accumulation of body fat, a condition known as lipodystrophy. While this involves changes to body composition, the official label does not explicitly state that the drug causes general weight gain or weight loss.

Q: What is known about the long-term safety profile of Калетра?

A: Long-term use is associated with monitoring for potential changes in metabolic health, specifically elevations in cholesterol and triglyceride levels. Regulatory documents also highlight the potential for fat redistribution (lipodystrophy) as a documented safety pattern seen with prolonged exposure to this class of medication.

Q: Does research indicate that Калетра can be taken without food?

A: Administration guidelines differentiate between the dosage forms regarding food intake. The film-coated tablets can be taken with or without food. In contrast, the oral solution formulation must be taken with food to ensure proper absorption and effectiveness.

Q: What are the main findings from the clinical trials of Калетра?

A: Clinical trials for HIV-1 infection demonstrated that the medication, when used in combination with other antiretroviral medicines, achieved high rates of virological suppression. Studies demonstrated that a high proportion of patients achieved virological suppression, which means maintaining very low levels of the virus in the blood over time.

Q: Does the efficacy of Калетра change over time?

A: Research has described the durability of the virologic and immunologic benefits achieved by the drug. Due to its mechanism and high genetic barrier to resistance, evidence suggests that the therapeutic effect can be sustained over long periods for many patients, provided the regimen is followed consistently.

Q: Are there any generic versions of Калетра available?

A: Yes, the regulatory authority in the United States (FDA) has approved generic versions of both the lopinavir/ritonavir tablet and the oral solution formulations. The specific availability of these generics may vary internationally based on local regulatory approvals.

Q: Does official information suggest Калетра is associated with changes in mood or sleep?

A: Official safety documents list Insomnia, or difficulty sleeping, as a Common adverse reaction observed in clinical use. Other distinct mood changes are not routinely listed within the frequency-classified adverse reactions in the main safety summaries.

Q: Is Калетра ever given as a single drug therapy?

A: The drug is officially indicated for use as a component of a combination antiretroviral therapy regimen. While some smaller studies have investigated its use as monotherapy (a single drug) in very specific, carefully selected patients, combination therapy remains the established standard of care for HIV-1 infection.

Q: Can I switch between the tablet and liquid forms of Калетра?

A: The two dosage forms, film-coated tablets and oral solution, have different dosing and administration requirements, particularly regarding the need to take them with food. Official labels note that the oral solution may be used for patients, such as young children, who are unable to swallow tablets. A change in formulation between the tablet and liquid should be managed by a treating physician due to the differing requirements.

Q: What are the characteristics of the viral resistance that Калетра is meant to prevent?

A: Regulatory documents reference the importance of monitoring for the development of resistance-associated substitutions, or mutations, in the virus. For instance, the Once Daily regimen is not recommended for adults who are known to have three or more of a specific set of lopinavir resistance-associated substitutions in their virus.

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How should Калетра be stored and disposed of?

How to Store and Dispose of Калетра?

The official storage and disposal requirements for this medication vary based on the dosage form, as mandated by regulatory authorities.

Formulation Mandatory Storage Conditions Stability & Packaging Rules
Film-Coated Tablet Store at Controlled Room Temperature (20 C to 25 C). Must be kept in the original container, closed tightly, to protect from high humidity. Stability is compromised if kept outside the container for over two weeks.
Oral Solution Primary: Refrigeration (2 C to 8 C); Do not freeze. If stored at room temperature (below 25 C), the solution must be used within 2 months.

All forms must be stored out of the sight and reach of children. Unused or expired medication should be discarded according to official government disposal guidelines, such as those provided by the FDA; the product is not classified for flushing down the toilet.

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

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