Tenofovir, Lamivudine, and Efavirenz Tablets are a fixed-dose combination medicine widely used in the treatment of HIV-1 infection. This single-tablet regimen simplifies therapy by combining three antiretroviral drugs.

Here are the main details:

• Main Uses:

  • Treatment of HIV-1 infection in adults and adolescents.

  • Helps reduce viral load and increase CD4 cell counts, improving immune function.

  • Lowers the risk of HIV-related complications and transmission when used consistently with other preventive measures.

• How It Works:

  • Tenofovir disoproxil fumarate (TDF) – a nucleotide reverse transcriptase inhibitor (NtRTI) that blocks viral replication.

  • Lamivudine (3TC) – a nucleoside reverse transcriptase inhibitor (NRTI) that interferes with viral DNA synthesis.

  • Efavirenz (EFV) – a non-nucleoside reverse transcriptase inhibitor (NNRTI) that directly blocks the reverse transcriptase enzyme.

  • Together, they provide triple antiretroviral therapy, preventing the virus from multiplying.

• Administration:

  • Taken once daily, usually at bedtime to reduce side effects such as dizziness.

  • Should be taken on an empty stomach, as food can increase side effects of efavirenz.

  • Important to take regularly at the same time to maintain drug levels.

• Common Side Effects:

  • Dizziness, vivid dreams, or trouble sleeping (due to efavirenz).

  • Headache, nausea, diarrhea, or fatigue.

  • Skin rash (mild to moderate).

• Serious Concerns:

  • Liver toxicity (monitor liver function).

  • Kidney function problems (mainly from tenofovir).

  • Bone density loss (associated with tenofovir).

  • Severe depression, anxiety, or psychiatric effects (from efavirenz in some patients).

  • Lactic acidosis and enlarged liver (rare but serious).

• Precautions:

  • Not recommended during pregnancy unless benefits outweigh risks (efavirenz may cause harm in early pregnancy).

  • Should not be combined with other medicines containing tenofovir, lamivudine, or efavirenz.

  • Caution in patients with liver disease, kidney disease, or psychiatric disorders.

  • Regular monitoring of viral load, CD4 count, kidney and liver function is necessary.

• Storage: Keep in a cool, dry place, away from moisture and direct light.

👉 This combination is a backbone therapy in HIV management because it provides a complete regimen in a single tablet, improving adherence and long-term viral suppression.