This combination is indicated as a complete regimen for the treatment of human immunodeficiency virus (HIV-1) infection. It is prescribed for adults and pediatric patients weighing at least 40 kg. The regimen works as a standalone therapy in most cases and helps reduce viral load, improve immune system function, and slow disease progression when taken consistently as directed.

This medication works through a combination of mechanisms targeting HIV replication. Lamivudine and tenofovir disoproxil fumarate are nucleoside/nucleotide reverse transcriptase inhibitors (NRTIs) that block the reverse transcriptase enzyme, preventing the virus from copying its genetic material. Efavirenz is a non-nucleoside reverse transcriptase inhibitor (NNRTI) that directly inhibits the same enzyme in a different way. Together, these drugs stop HIV from multiplying, reduce viral load, and support immune recovery.

This medication is available as a film-coated tablet containing 600 mg efavirenz, 300 mg lamivudine, and 300 mg tenofovir disoproxil fumarate. The recommended dosage is one tablet taken once daily, preferably at bedtime to reduce side effects such as dizziness or abnormal dreams. It should be taken regularly at the same time each day, and patients should follow their doctor’s instructions carefully to maintain effective viral control.

Common side effects include dizziness, headache, nausea, diarrhea, fatigue, muscle pain, and sleep disturbances such as insomnia or vivid dreams. Some patients may also experience impaired concentration, rash, cough, or mood changes including depression. Serious side effects, although less common, include bone loss, kidney injury, worsening of hepatitis B, and immune reconstitution syndrome. Patients should seek immediate medical attention if they experience severe rash, allergic reactions, or significant psychiatric symptoms.

This medication should not be used in patients with known hypersensitivity to efavirenz, lamivudine, or tenofovir disoproxil fumarate. Caution is advised in patients with a history of pancreatitis, liver or kidney disease, seizures, heart conditions, or bone disorders. Regular monitoring of blood counts, kidney and liver function, and bone health is important during treatment. Women of childbearing potential should use effective contraception and avoid pregnancy during treatment and for at least 12 weeks after the last dose. Breastfeeding is not recommended due to the risk of HIV transmission. Patients should avoid driving or operating machinery if they feel dizzy or tired.

Efavirenz, lamivudine, and tenofovir disoproxil fumarate provide a convenient and effective once-daily treatment option for HIV infection. By combining three potent antiviral agents into a single tablet, it simplifies therapy and improves adherence. While generally effective, it requires careful monitoring for side effects and regular follow-up. With proper use and medical supervision, this combination remains a key component in modern HIV treatment.

It is used as a complete treatment regimen for HIV-1 infection in adults and children weighing at least 40 kg, helping control the virus and improve immune function.

It is not recommended to take this tablet with other HIV medications unless prescribed. Always inform your doctor about any other medicines, supplements, or herbal products you are using.

It should be stored below 30°C in its original container, away from moisture and out of reach of children.

If you miss a dose, take it as soon as you remember. If it is close to your next dose, skip the missed dose and continue your regular schedule. Do not take a double dose.

Your doctor may perform tests such as pregnancy tests, hepatitis B screening, kidney function tests, liver function tests, and blood parameters before starting treatment.

Symptoms such as severe rash, swelling of the face or lips, or serious skin reactions like Stevens-Johnson syndrome may indicate hypersensitivity and require immediate medical attention.

Long-term side effects may include bone loss, kidney problems, liver toxicity, worsening hepatitis B, and immune-related conditions, which require ongoing monitoring.

Yes, some patients may experience psychiatric symptoms such as depression, anxiety, abnormal thoughts, or hallucinations. Immediate medical attention is needed if such symptoms occur.