Атрипла

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Атрипла

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Treatment option: Infection

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 Атрипла

Property Description
Active Ingredients Efavirenz, Emtricitabine, Tenofovir Disoproxil Fumarate
Form Fixed-Dose Combination (FDC) Tablet
Pharmacological Class Antiretroviral Agents (NNRTI & NRTI/NtRTI)
Common Use Management of Human Immunodeficiency Virus-1 infection (HIV-1 infection)
Origin Synthetic

What Type of Medicine is Атрипла? (Definition and Classification)

Атрипла is a Fixed-Dose Combination (FDC) antiretroviral medication provided as a single-tablet regimen (STR), used in the comprehensive management of Human Immunodeficiency Virus-1 infection (HIV-1 infection). This prescription drug combines three distinct synthetic anti-HIV agents into a single film-coated tablet for oral administration. The medication belongs to the broader category of Antiviral Combinations and is specifically a form of triple antiretroviral therapy (ART). The use of a combination of antiretroviral drugs is the standard approach to treat HIV infection, as this method reduces the amount of virus in the body. This strategy is clinically recognized for its efficacy and patient adherence benefits.

Active Ingredients and Pharmacological Classes in Атрипла (Composition and Type)

The three active ingredients in the combination are Efavirenz, Emtricitabine, and Tenofovir Disoproxil Fumarate (TDF). The formulation integrates two complementary pharmacological classes: Efavirenz is a Non-Nucleoside Reverse Transcript Inhibitor (NNRTI), while Emtricitabine (a Nucleoside Reverse Transcriptase Inhibitor or NRTI) and Tenofovir Disoproxil Fumarate (a Nucleotide Reverse Transcriptase Inhibitor or NtRTI) work together. The combination of these three agents in one tablet provides an effective and convenient way to manage the disease. This combination is considered medically effective for suppressing the virus, and its triple-action composition is a distinctive feature that supports comprehensive viral control.

The Benefit of a Three-in-One Combination (General Purpose and Form)

The core benefit of the three-drug combination in a Single-Tablet Regimen is its contribution to treatment simplification and efficacy. By combining three agents with different physiological actions, Атрипла offers a synergistic antiviral effect. This streamlined format is crucial for individuals with HIV-1 infection because simplifying the regimen into a single pill supports consistent daily adherence, which is necessary to minimize the risk of viral resistance and maintain the primary goal of viral load suppression.

What side effects are possible with Атрипла?

Possible side effects and safety information

The safety profile of Атрипла is defined by adverse reactions officially documented in government regulatory sources for the combination of Efavirenz, Emtricitabine, and Tenofovir Disoproxil Fumarate.

Adverse reactions are formally categorized by frequency and grouped according to the specific System-Organ Classes (SOCs) they affect. Very Common (ge 1/10) adverse reactions generally include symptoms such as dizziness, headache, nausea, and rash. Common (ge 1/100) effects include insomnia, abnormal dreams, anxiety, and hyperpigmentation (skin discoloration).


Serious Adverse Reactions and Safety Constraints

Official labeling highlights several serious adverse reactions, including the documented risk of Lactic Acidosis and Severe Hepatomegaly with Steatosis (a rare but serious concern associated with nucleoside analogs). Severe Psychiatric Symptoms (e.g., severe depression, suicidal ideation) and New Onset or Worsening Renal Impairment are also listed as significant safety concerns

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The medicine is contraindicated in patients with severe hepatic impairment (Child-Pugh Class C). It is also not recommended for patients with moderate or severe renal impairment (creatinine clearance < 50 mL/min) because the fixed-dose formulation prevents necessary dose adjustment for the Tenofovir component.


Time-Related and Population-Specific Safety Notes

The regulatory data note a time-related pattern for certain effects: Nervous System Symptoms (like dizziness and impaired concentration) are often more common at the start of treatment and typically resolve within the first few weeks. Renal and Bone toxicity is generally associated with long-term exposure. A safety note is included for co-infected individuals, noting that discontinuation of the medicine may lead to severe acute exacerbations of Hepatitis B in patients with both HIV and HBV.

Overdose and Emergency Response

Any suspected overexposure to Atripla requires immediate action. The official regulatory guidance mandates that patients or caregivers contact emergency medical services, a poison control center, or go to the nearest hospital emergency room right away if an overdose is suspected or confirmed.

Documented clinical manifestations of overdosage are primarily linked to the Efavirenz component. These include an increase in the severity of nervous system symptoms and the formal observation of involuntary muscle contractions. These manifestations highlight the need for urgent clinical observation by a healthcare professional.

The management of an Atripla overdose is defined by the regulatory authorities as symptomatic and supportive. No specific antidote is known for this combination medicine. Treatment involves general supportive measures, including careful monitoring of vital signs and observation of the patient's clinical status.

A key constraint in medical management is that forced elimination methods, such as dialysis, are unlikely to significantly remove the drug's Efavirenz component from the body due to its high degree of plasma protein binding. Consequently, official procedures focus entirely on supportive care, and the administration of activated charcoal may be considered to aid in drug removal.

Therapeutic Uses of Атрипла

What Атрипла treats: main uses and benefits

Атрипла is used for managing Human Immunodeficiency Virus type 1 (HIV-1) infection as a complete, single-tablet regimen. The primary therapeutic aim is management of the chronic viral infection, contributing to a reduction in the amount of HIV in the blood (viral load) and supporting the overall function of the body's immune system.

This essential action helps manage the progression of HIV and may reduce the risk of serious opportunistic infections and associated illnesses that stem from immune deficiency. The medication is commonly used in clinical scenarios characterized by conditions involving episodic or fluctuating manifestations where supporting stable viral control is relevant. The combined formula supports consistent adherence to the treatment plan, which assists with the effectiveness of the treatment plan. This treatment simplification assists with efforts toward maintaining viral control and supports general well-being during symptomatic phases.


Quick Fact: Supports Management of Systemic Strain


Eligibility and Restrictions for Use

This medication is a fixed-dose combination and its use is subject to specific eligibility criteria documented in official regulatory labeling.

Status Eligibility Requirement Restrictions and Exclusions
Allowed Adults and pediatric patients with HIV-1 infection who weigh at least 40 kilograms (approximately 88 pounds). Must not have previous virologic failure or resistance conferring significant resistance to any of the three components.
Not Recommended Patients with moderate or severe renal impairment (estimated creatinine clearance less than 50 mL/min). The fixed-dose tablet cannot be adjusted for these conditions.
Not Recommended Patients with moderate or severe hepatic impairment (Child-Pugh B or C). Use in severe hepatic impairment is formally contraindicated.
Contraindicated Patients with clinically significant hypersensitivity to efavirenz (a component of the medicine). Also contraindicated with certain concomitant medicines, including voriconazole and elbasvir/grazoprevir.

Specific Population Considerations

  • Pregnancy: Use is generally avoided during the first trimester due to potential fetal harm; a pregnancy test is recommended prior to initiation. Women must avoid becoming pregnant during therapy and for 12 weeks after discontinuation.
  • Lactation: Breastfeeding is not recommended for women with HIV-1 infection to prevent potential HIV-1 transmission to the infant and due to potential adverse effects.
  • Cardiac/Electrolyte Conditions (EMA): Use is contraindicated in patients with congenital QTc prolongation, certain arrhythmias, and severe disturbances of electrolyte balance.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Атрипла is a fixed-dose combination product whose interaction profile is determined primarily by the efavirenz and tenofovir disoproxil fumarate components.

Contraindicated Combinations

Coadministration is strictly contraindicated with specific drugs due to the potential for serious or life-threatening adverse reactions, or loss of therapeutic effect. These include the strong CYP3A4 inhibitors Voriconazole and Elbasvir/Grazoprevir. Other contraindicated medicines are those metabolized by CYP3A4 where competition can lead to toxicity, such as Cisapride, Pimozide, Midazolam, Triazolam, Bepridil, Astemizole, Terfenadine, and Ergot alkaloids.

Other Significant Interactions

  • CYP3A4 Inducers: The herbal product St. John’s wort must not be used due to its ability to significantly decrease the plasma concentration of efavirenz, leading to loss of therapeutic effect.
  • Antiretrovirals: Coadministration with other medicinal products containing the same active substances (efavirenz, emtricitabine, tenofovir disoproxil fumarate) or related nucleosides (lamivudine, adefovir dipivoxil) is not recommended.
  • Nephrotoxic Agents: Concurrent use with drugs that impair renal function or compete for active tubular secretion should be avoided, as this can increase the concentration of the tenofovir component, potentially worsening renal impairment.
  • Anticonvulsants: Caution and therapeutic monitoring are required when co-administering with certain anticonvulsants (e.g., Phenytoin, Phenobarbital) due to potential changes in plasma levels of both drugs, which may require an efavirenz dose adjustment when using Rifampin in adults weighing 50 kg or more.

Mechanism of Action

Атрипла is a fixed-dose combination product containing efavirenz, emtricitabine, and tenofovir disoproxil fumarate (TDF), which collectively target the viral enzyme Reverse Transcriptase (RT).

Efavirenz is a non-nucleoside reverse transcriptase inhibitor (NNRTI). It functions by noncompetitive inhibition, binding directly to a distinct allosteric site on the HIV-1 RT enzyme. This binding induces a conformational change that sterically hinders the catalytic domain's activity, thereby impeding the RNA-to-DNA reverse transcription process.

Emtricitabine and TDF are nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs). They are intracellularly phosphorylated by host cellular kinases to form their active triphosphate and diphosphate metabolites, respectively: emtricitabine 5'-triphosphate and tenofovir diphosphate. These active metabolites function as competitive inhibitors against the natural deoxyribonucleoside triphosphate substrates for HIV-1 RT. Once incorporated into the nascent viral DNA chain, these analogs lack the necessary 3'-hydroxyl group, resulting in immediate DNA chain termination and cessation of viral replication. The multi-pathway inhibition of reverse transcriptase reduces the production of new viral genomic material, modulating the systemic viral load.

Dosage and Administration Information

How to Use Атрипла

Атрипла is a Fixed-Dose Combination (FDC) antiretroviral medication administered as a single-tablet regimen for the management of HIV-1 infection. The medication is for oral use, adhering to a defined daily regimen that ensures consistent exposure to its three active components: Efavirenz (600 mg), Emtricitabine (200 mg), and Tenofovir Disoproxil Fumarate (300 mg).


Standard Administration Principles

Principle Instruction
Dosing Schedule One tablet, once daily.
Timing Relative to Food Must be taken on an empty stomach.
Preferred Time of Day Preferably at bedtime, a contextual practice intended to manage potential nervous system effects.
Method of Intake The tablet must be swallowed whole with water; it should not be crushed.

Official Usage Constraints

Specific patient populations and conditions exist for which the FDC tablet is appropriate. Usage is restricted to certain pediatric patients, defined as those who are 12 years of age or older and weigh at least 40 kg (88 lbs), utilizing the same standard adult dose. Furthermore, the single-tablet regimen is not recommended for patients with moderate to severe renal impairment (creatinine clearance below 50 mL/min) or moderate to severe hepatic impairment, as the fixed dose prevents the necessary adjustment of individual component drug levels.

Instructions for a missed dose specify that if less than 12 hours have passed, the tablet should be taken immediately; if more than 12 hours have passed, the missed dose should be skipped, and the regular schedule resumed.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Атрипла

Evidence for Use in Patients Starting Treatment for HIV-1 Infection

The primary research exploring the Atripla regimen includes randomized controlled trials (RCTs). These studies form the initial evidence base from trials exploring the Atripla regimen in adults and adolescents who are treatment-naïve, meaning they were starting therapy for the first time. Research explored the outcomes when the regimen was compared to other anti-HIV drug combinations available at the time.

The primary focus of these studies was on specific biological markers. Researchers monitored the proportion of participants who achieved virologic efficacy, where the amount of HIV in the blood (viral load) reached specific low or undetectable levels. Findings describe the measured proportion of participants who reached the target thresholds for low or undetectable viral load in the trials. A limitation in the initial evidence base is that the single-tablet regimen itself was not directly compared against taking the three individual component pills together; regulatory context relied on bioequivalence studies to confirm drug delivery.


Evidence for Maintaining Viral Control in Switched Patients

Research has also explored the use of Атрипла for patients who had achieved stable viral control on a multi-pill anti-HIV regimen. This indication is supported by randomized controlled "switch" trials. These studies focused on adults who had achieved stable, long-term virologic suppression and then transitioned to the single-tablet combination.

The main outcome monitored in these switch trials was the maintenance of virologic suppression. Switch studies reported the measured proportion of participants who maintained low or undetectable viral load throughout the short- to intermediate-term study durations. Some research exploring patient adherence reported patterns observed alongside the simplification to a single-tablet regimen.


Understanding Research Gaps and Limitations

As with all medications, research on Атрипла has certain gaps and limitations that are important for contextualizing the findings. A limitation of the single fixed-dose formulation is the lack of individual component dose flexibility, meaning the dosage cannot be adjusted independently. Data for certain patient groups remain limited, including limited numbers of patients over the age of 65 in the initial pivotal trials.

Key Studies & References

  1. Efficacy and safety of a fixed-dose combination of efavirenz, emtricitabine, and tenofovir DF in treatment-naive HIV-1-infected subjects

Frequently Asked Questions (FAQ)

Common questions about Атрипла (FAQ)


Q: Can Atripla be used by pregnant individuals?

A: Official regulatory documents indicate that potential fetal harm may occur if the medication is taken during the first trimester of pregnancy. For this reason, official guidance describes avoiding pregnancy during treatment and for 12 weeks after the drug is stopped. A pregnancy registry is available to monitor outcomes when the medication is used during pregnancy.


Q: Is there a link between Atripla and changes in bone density?

A: Official product information notes that Tenofovir disoproxil fumarate, one of the components of Atripla, can cause decreases in bone mineral density (BMD). Patients using the drug for long periods may be subject to monitoring for potential bone effects.


Q: Is there published research on the long-term safety of Atripla?

A: Studies examining the regimen for up to several years have identified specific long-term safety concerns. Adverse reactions reported include potential kidney problems, bone loss, nervous system symptoms, and changes in body fat distribution. These findings are documented in the official safety information.


Q: What is the risk of developing resistance to the medication?

A: The official product labeling is explicit that the medication is not recommended for individuals whose HIV virus strains are known to have significant resistance to any of the three components. The medication is intended for use when the virus is susceptible to all three active ingredients. The development of drug resistance is a potential outcome if treatment is not successful.


Q: What studies established the use of Atripla for initial HIV treatment?

A: The use of the Atripla regimen was established through clinical trials, including randomized controlled trials (RCTs). These studies assessed a combination containing efavirenz, emtricitabine, and tenofovir disoproxil fumarate in patients who were starting anti-HIV therapy for the first time.


Q: How does Atripla compare to taking the three component drugs separately?

A: Regulatory assessment, which included bioequivalence studies, determined that the single fixed-dose combination pill is bioequivalent to taking the three individual component drugs together. This means the drug is expected to deliver the same amount of medication into the body.


Q: What is the difference between brand-name and generic versions of the components in Atripla?

A: Generic versions of the components are regulated to be bioequivalent to the reference product. This is a regulatory standard indicating they contain the same active substances and are expected to achieve the same therapeutic effect.


Q: Does Atripla affect the results of other common medical tests?

A: Official labeling mentions that Efavirenz, a component of Atripla, may interfere with certain laboratory tests. This interference has been noted specifically with some assays used to detect certain drugs (such as cannabinoid and benzodiazepine assays).


Q: Are there any long-term effects on the nervous system?

A: New or worsening nervous system symptoms are a frequently reported side effect. While often more common when starting treatment, official information notes these symptoms, which can include dizziness and trouble concentrating, may persist for months or, rarely, years after treatment begins.


Q: Can taking Atripla affect the ability to drive or operate machinery?

A: Official patient information advises that the medication can cause side effects such as dizziness, impaired concentration, and drowsiness. Official information indicates that individuals experiencing these effects may need to avoid driving or operating heavy machinery.


Q: Can consuming grapefruit products affect how Atripla works?

A: Some professional resources suggest caution regarding grapefruit. Since grapefruit is known to interact with certain enzymes in the body, it may affect the level of the efavirenz component of the drug. Official information suggests consulting a healthcare provider regarding specific dietary considerations.


Q: Is it true that Atripla can interact with antacids?

A: A clinically significant drug interaction with common antacids is generally not expected according to official product information. This is because the absorption of Atripla is not highly dependent on the level of acidity in the stomach.


Q: Are there known interactions between Atripla and herbal remedies?

A: Yes, regulatory documents strictly state that herbal preparations containing St. John’s Wort (Hypericum perforatum) must not be used while taking Atripla. This is because St. John’s Wort can significantly decrease the level of the efavirenz component in the blood.


Q: Is a rash a common sign of a serious reaction to Atripla?

A: Rash is listed as a very common side effect. However, the drug is contraindicated in patients with a history of serious hypersensitivity reactions. The official guidance indicates that if a severe rash develops, treatment discontinuation may be required.


Q: Is Atripla used for anything besides HIV treatment?

A: The medication is indicated for the treatment of HIV-1 infection in adults and in pediatric patients who weigh at least 40 kg. No other primary medical uses are currently indicated in the official regulatory documents.


Q: Does taking Atripla affect cholesterol levels or blood fats?

A: According to the official safety profile, taking the medication can lead to elevated levels of total cholesterol and triglycerides (a type of blood fat) in the blood. Monitoring of these levels may be performed as part of routine medical care.


Q: Does taking Atripla affect weight or appetite?

A: Official safety data lists adverse reactions that include both loss of appetite and changes in body fat distribution. These changes may involve the accumulation or loss of fat in certain areas of the body.


Q: Does Atripla cause changes to skin or hair?

A: Adverse reactions reported in the official safety profile include rash and changes in skin color, such as hyperpigmentation. Hyperpigmentation refers to the darkening of the skin, most commonly noted on the palms and soles.


Q: Should I have a psychiatric history reviewed before starting treatment?

A: The drug is associated with serious psychiatric symptoms, including severe depression and suicidal thoughts. Official information indicates that the drug should be used with caution in patients with a history of psychiatric illness.

How should Атрипла be stored and disposed of?

How to Store and Dispose of Atripla

The following instructions reflect the official storage, handling, and disposal requirements as mandated by regulatory authorities.

Requirement Official Statement
Storage Temperature Store at 25 C (77 F). Excursions permitted between 15 C and 30 C (59 F and 86 F).
Packaging Keep the tablets in the original container, which must be tightly closed and includes a child-resistant closure and desiccant.
Protection Keep the medication away from excessive heat and moisture.
Child Safety Atripla and all medicines must be kept out of the reach of children.
Disposal Dispose of any unused or expired medication according to official governmental guidelines, such as utilizing a drug take-back program or following specific FDA instructions for home disposal, to prevent environmental contamination and accidental exposure.

Strict adherence to these official conditions is required to maintain the stability and effectiveness of the medication.

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

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