Duovir 150 300 mg
Available Dosages
| SKU | 574 |
|---|---|
| Generic For | Combivir |
| Strength | 150 + 300 mg |
| Active Ingredient | Lamivudine + Zidovudine |
| Pack Size | Qty | Price Per Pill or Unit | Price | Cart | |
|---|---|---|---|---|---|
| 30 Tablet/s | US$ 1.83 | US$ 54.87 | |||
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| 60 Tablet/s | US$ 1.83 | US$ 109.72 | |||
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| 90 Tablet/s | US$ 1.83 | US$ 164.59 | |||
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Duovir 150 300 mg – Affordable Combivir Alternative for HIV Treatment
Duovir 300 mg is one of the highly recommended antiviral medicines. It contains the two active ingredients belonging to the following two groups: nucleoside analogues and non-nucleoside reverse transcriptase inhibitors. This drug is used to treat Human Immunodeficiency Virus infection by blocking an enzyme needed by the virus to reproduce.
What is Duovir used for?
Duovir- 150 300 mg tablets are prescribed to treat HIV infection in patients with or without acquired immunodeficiency syndrome (AIDS). HIV directly affects the immune system by impairing the specific immune cells (CD4) that counter infection, so the risk of life-threatening infection increases. Duovir medicine can prevent or slow down the ability of HIV to replicate, lowering the capacity of the virus. This medication functions to increase the number of CD4 cells, providing good strength to the immune system and defying the risk of disease.
How does Duovir work?
A combination of two antiretroviral drugs, Lamivudine and Zidovudine available in Duovir makes this medicine a nucleoside analogue reverse transcriptase inhibitor that acts against retroviruses (RNA virus) like HIV. A nucleoside builds blockage of DNA, denying the virus to replicate, while its nucleoside analogues are incorporated into the DNA that is copied from the virus RNA by an enzyme called reverse transcriptase. This function helps to block the action of reverse transcriptase and thereby terminating the viral DNA chain to discourage the effect of HIV. Duovir tablets can only slow down the replication of HIV within the body but cannot prevent the spread of the infection or transmission to others.
What medications interact with Duovir?
There is a list of medications that interact with Duovir 150 ? mg so, they should be avoided along with this drug. Some particular drugs that may react with Duovir are anti-infective, pentamidine, amphotericin, flucytosine, vincristine, pyrimethamine, co-trimoxazole, the antiviral ganciclovir, dapsone, vinblastine and doxorubicin for cancer treatment. Duovir should not be taken with some other agents like stavudine, emtricitabine, efavirenz, fosamprenavir, indinavir, ketoconazole, itraconazole, and probenecid.
Some other drugs that are affected by Duovir include stavudine, the anticonvulsant phenytoin, and antiretroviral zalicitabine.
When Duovir Duovir not be taken?
One should avoid Duovir in the conditions of:
- Allergic to lamivudine or zidovudine or any ingredients in Duovir tablets
- Pregnancy or breastfeeding
- Abnormally low neutrophil counts
- Blood disorders such as anemia or bone marrow problems
- Kidney or liver disease
- Anxiety and sleeping problems
- Immune modulator interferon
How should Duovir be taken?
Usually, you should take Duovir tablets as 1 tablet twice daily with a glass of water and with or without food. Your doctor can determine how much and how long this medicine should be taken. If you miss a dose of Duovir then take it as soon as you remember, but don’t increase the amount to make up the missed dose.
How long should Duovir be used?
Continue using Duovir 150 ? mg for as long as your physician recommends you to.
Missed dose of Duovir
If you miss a dose of Duovir 150? mg, then take it as soon as you remember. Don’t double the amount to make up the missed dose.
How should Duovir be stored?
Keeping this medicine at a room temperature in a cool and dry place will be good for it.
What are the side effects of Duovir?
There are some usual side effects of Duovir tablets that include:
- Headache
- Gastrointestinal upset
- Nausea and diarrhea
- Constipation
- Fever
- Stomach pain
- Dizziness
- Blistering
- Fatigue
- Eye inflammation
- Difficulty sleeping
- Rash
- Reduction in white blood cells
- Hair loss
- Muscle and joints aches and pains
The most severe side effect of this medication is damage to the liver (lactic acidosis). Its persistence can cause pancreatitis, liver failure, or renal failure. If you experience a severe rash or any other side effects associated hypersensitivity reaction of this medicine, you must contact your doctor immediately.
What is Duovir 150/300mg used for?
Duovir 150/300mg contains lamivudine 150mg and zidovudine 300mg — a dual nucleoside reverse transcriptase inhibitor (NRTI) combination for HIV-1 infection. This fixed-dose combination (FDC) simplifies HIV therapy by combining two complementary NRTIs in one tablet. Duovir is used as part of combination antiretroviral therapy (cART) — always combined with a third agent (typically a non-nucleoside reverse transcriptase inhibitor, integrase strand transfer inhibitor, or boosted protease inhibitor). It is not used as HIV monotherapy or dual NRTI therapy alone.
How does the lamivudine/zidovudine combination in Duovir work against HIV?
Both lamivudine (3TC) and zidovudine (AZT/ZDV) are nucleoside reverse transcriptase inhibitors — they inhibit HIV reverse transcriptase, the enzyme that converts HIV RNA to DNA for integration into the host genome. Lamivudine incorporates into growing DNA chains as a cytidine analogue, causing chain termination; zidovudine does the same as a thymidine analogue. Their complementary mechanisms and non-overlapping resistance pathways make them an effective NRTI backbone combination. Together, they form the two-drug NRTI backbone to which a third agent is added to create an effective triple-drug HIV regimen.
How should Duovir 150/300mg be taken?
The standard dose is one Duovir tablet (lamivudine 150mg/zidovudine 300mg) twice daily, taken with or without food. Food reduces zidovudine-related nausea. Consistent twice-daily timing (12 hours apart) is essential to maintain adequate plasma drug levels and viral suppression. Missed doses risk viral rebound and resistance development. Use a reminder system (alarms, pill organiser) to maintain adherence. Never take only one antiretroviral — always as part of a complete triple (or more) drug regimen. Do not substitute or discontinue any component without specialist HIV physician advice.
What third agent should be combined with Duovir 150/300mg for HIV treatment?
Duovir provides the NRTI backbone to which a third agent from a different class is added. Common third-agent options: integrase inhibitors (dolutegravir, raltegravir — currently preferred in most guidelines for first-line treatment); NNRTIs (efavirenz, rilpivirine, nevirapine — effective but with more restrictions); boosted protease inhibitors (lopinavir/ritonavir, atazanavir/ritonavir — still used in specific situations). Current WHO and major HIV treatment guidelines often prefer dolutegravir-based regimens as first-line due to high efficacy, tolerability, and resistance barrier.
Is Duovir 150/300mg safe for HIV-positive patients with tuberculosis co-infection?
Zidovudine and lamivudine in Duovir can be used in HIV/TB co-infected patients, but rifampicin (used in TB treatment) significantly reduces zidovudine plasma levels by inducing glucuronidation. This interaction may reduce AZT efficacy. Current guidelines for HIV/TB co-infection prefer tenofovir-based NRTI backbones (tenofovir + lamivudine, e.g. Combivir alternative) because tenofovir is not affected by rifampicin in the same way. If Duovir is the only available NRTI backbone, rifampicin-based TB regimens can still be used with careful virological monitoring.
What are the main toxicities of Duovir's components — lamivudine and zidovudine?
Lamivudine (150mg) is well tolerated — headache and nausea are the main short-term effects. Zidovudine (300mg) has a more significant toxicity profile: anaemia and neutropenia (bone marrow suppression) requiring FBC monitoring — particularly important in patients with pre-existing low haematocrit; nausea and vomiting (reduced by taking with food); lipodystrophy and myopathy with long-term use; rare lactic acidosis. Haematological toxicity is the key safety concern — check FBC before initiation, at 4 weeks, then every 3–6 months. Dose modification or AZT substitution needed if Hb <7.5g/dL or neutrophils <750/mm³.
How does Duovir 150/300mg compare to Truvada (tenofovir/emtricitabine)?
Duovir (lamivudine/zidovudine) and Truvada (tenofovir/emtricitabine) are both dual NRTI backbones for HIV combination therapy. Key differences: Truvada is now preferred in most high-income settings for its better tolerability (no bone marrow toxicity), once-daily dosing convenience, and activity against both HIV and HBV. Duovir requires twice-daily dosing and carries zidovudine's anaemia risk. Emtricitabine and lamivudine have equivalent activity (similar resistance profile). In resource-limited settings, lamivudine/zidovudine remains widely used due to cost and availability.
Is Duovir 150/300mg equivalent to Combivir?
Yes. Duovir 150/300mg and branded Combivir both contain lamivudine 150mg and zidovudine 300mg in bioequivalent fixed-dose combination formulations. Duovir is the generic version providing the same HIV NRTI backbone at significantly lower cost — critical for resource-limited settings where affordability determines treatment access.
Can I order Duovir 150/300mg from PremiumRxDrugs for international delivery?
Yes. PremiumRxDrugs.com ships Duovir 150/300mg to the USA, UK, Australia, and many other countries. Our genuine manufacturer-verified HIV medications, competitive pricing, and free worldwide shipping on qualifying orders make us a reliable international source for affordable antiretroviral therapy.
What blood tests are required while taking Duovir 150/300mg?
Mandatory monitoring: FBC (full blood count) at baseline, 4 weeks, then every 3–6 months — to detect zidovudine-induced anaemia and neutropenia; HIV viral load every 3–6 months (undetectable <50 copies/mL is the goal); CD4+ count every 3–6 months; liver function tests every 6 months; renal function (eGFR) — particularly important if co-infected with HBV or on nephrotoxic agents; fasting lipids and glucose annually (HIV and antiretrovirals increase cardiovascular risk); and genotypic resistance testing at baseline and if virological failure occurs.
What should I do if I miss a dose of Duovir 150/300mg?
If a Duovir dose is missed and remembered within 2 hours, take it immediately and continue the regular twice-daily schedule. If more than 2 hours have passed, skip the missed dose and take the next scheduled dose — never double up. Adherence is critical: even occasional missed doses can lead to periods of subtherapeutic drug levels, allowing HIV replication and selection of resistant mutations. Maintain >95% adherence for sustained viral suppression. Use pill diaries, phone alarms, or pill organisers. Discuss any adherence difficulties with your HIV pharmacist or nurse.
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