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Vonaday is a prescription fixed-dose combination tablet containing Efavirenz 600 mg, Lamivudine 300 mg, and Tenofovir Disoproxil Fumarate (TDF) 300 mg, used as part of antiretroviral therapy (ART) for adults living with HIV-1 infection to reduce viral load and support immune system recovery.
Please note: a valid prescription is required for all prescription medication.
Buy Vonaday online when prescribed by your HIV specialist. This once-daily, single-tablet regimen simplifies antiviral therapy by combining three potent agents in one dose. It supports adherence, helps maintain viral suppression and contributes toward keeping your immune system strong. Use only under medical supervision with appropriate monitoring.
Vonaday contains:
Efavirenz 600 mg — a non-nucleoside reverse transcriptase inhibitor (NNRTI) that binds to the HIV-1 reverse transcriptase enzyme, preventing viral RNA from converting into DNA.
Lamivudine 300 mg — a nucleoside reverse transcriptase inhibitor (NRTI) that blocks viral replication by mimicking cytidine.
Tenofovir Disoproxil Fumarate 300 mg — a nucleotide reverse transcriptase inhibitor (NtRTI) causing chain termination of viral DNA in HIV-1 and also active against hepatitis B virus.
Combining these three mechanisms in one tablet helps suppress HIV-1 viral replication, raise CD4+ cell counts and reduce the risk of HIV-related complications.
The available strength for Vonaday is:
Efavirenz 600 mg / Lamivudine 300 mg / Tenofovir Disoproxil Fumarate 300 mg — one tablet once daily.
Your doctor will determine if this regimen is suitable based on your weight, renal function, liver health and co-infection status (such as hepatitis B or C).
Efavirenz: binds to reverse transcriptase at an allosteric site, preventing DNA formation from viral RNA.
Lamivudine and Tenofovir: act as faulty building blocks for the viral DNA chain; once incorporated, they cause premature termination of replication. Together, they reduce HIV-1 viral load, increase CD4+ counts, and help your immune system recover. Consistent daily use is vital to prevent resistance and maintain control of the infection.
Vonaday is indicated for:
Treatment of HIV-1 infection in adults who are eligible for antiretroviral therapy. It is not a cure for HIV. It does not reduce the risk of HIV transmission through sexual contact, needle sharing or from mother to child — safe practices must continue.
Take one tablet once daily, preferably on an empty stomach at bedtime to reduce side-effects such as dizziness or rash associated with Efavirenz.
Swallow the tablet whole with water. Do not chew, divide or crush the tablet.
If you miss a dose and remember soon after, take it as soon as possible. If it’s near the time for your next dose, skip the missed one — do not take two tablets together.
Continue taking Vonaday every day, even if you feel well — stopping can lead to viral rebound and resistance.
Your doctor will monitor viral load, CD4 count, kidney and liver function, bone health, and may check for hepatitis co-infection.
Store Vonaday tablets at room temperature (below 30 °C), in the original container, away from moisture and heat. Keep out of reach of children. Do not use after expiry date.
Like all antiretrovirals, Vonaday may cause side-effects — many are mild and temporary.
Common side-effects:
Dizziness, strange or vivid dreams or nightmares (Efavirenz)
Fatigue, headache
Nausea, diarrhoea
Skin rash
Important warnings / less common effects:
Mood changes or depression
Liver problems or hepatitis flares (especially with hepatitis B co-infection)
Kidney problems or bone density loss (especially due to Tenofovir)
Severe rash or allergic reaction If you experience fever with rash, swelling of face/lips, breathing difficulty, double vision, think about urgent medical review.
Do not use Vonaday if you are allergic to any component of the medicine.
Tell your doctor if you have liver disease, kidney disease, bone disorders, neuropsychiatric history or infections like hepatitis B or C.
Women planning pregnancy or breastfeeding must discuss with their specialist — Efavirenz may cause fetal harm and HIV-positive women should not breastfeed unless in contexts where safe alternatives are unavailable.
Avoid driving or operating machinery when you start treatment because dizziness or drowsiness can occur.
Use effective birth control to avoid pregnancy while taking Efavirenz-based therapy.
Do not share your tablet with anyone.
Regular follow-up and lab monitoring is vital (viral load, CD4 count, kidneys, liver, bone density).
Vonaday interacts with many medications — always provide your doctor with a full list including over-the-counter and herbal products. Key interactions:
Drugs that induce or inhibit CYP3A4 (Efavirenz is metabolised via CYP3A4), e.g., rifampicin, rifabutin, phenytoin, carbamazepine.
Other antiretrovirals or medications that affect HIV plasma levels.
Drugs affecting kidney function (e.g., NSAIDs, nephrotoxic agents) — combined with Tenofovir risk kidney damage.
Hormonal contraceptives — Efavirenz may reduce their effectiveness; use barrier method also.
Drugs affecting mood — Efavirenz may exacerbate depression or psychosis.
If you accidentally take more than prescribed, contact a medical center immediately. Symptoms may include dizziness, confusion, hallucinations, very fast heartbeat, nausea or vomiting. Treatment is supportive — bring the medication box.
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