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What is HIV?

Treating HIV

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Nucleoside Reverse Transcriptase
Inhibitors (NRTIs)

NRTIs are also called “nucs.” The first anti-HIV drug, an NRTI called RETROVIR® (zidovudine), was approved by the FDA in 1987. Learn about another nuc

How nucs work

Nucs work by slowing down the rate at which copies of HIV are made in the body. Just like cells in the body, HIV also has its own genetic code. The genetic code of HIV provides instructions on how to make copies of itself. In order for HIV to make copies, there are a few things the virus needs to do:

  • The HIV virus needs to invade a cell in the human body
  • The HIV virus has to insert its own "instructions" or genetic code into the DNA of the human cell it has invaded

In order for HIV to insert its genetic code into the DNA of a human cell, HIV must "translate" its genetic code into a language that the human cell can understand. Nucs work by interfering in this translation process. As a result, HIV is unable to insert its genetic code into the DNA of the cell.

FDA-approved NRTIs

For additional information about these HIV products, please review the Important Safety Information.

Brand name Generic name Pharmaceutical company
Atripla®*† efavirenz, emtricitabine, and tenofovir DF Bristol-Myers Squibb and Gilead Sciences
COMBIVIR® (prescribing information) lamivudine/zidovudine GlaxoSmithKline
Emtriva®† Emtricitabine Gilead Sciences
EPIVIR® (prescribing information) lamivudine (3TC) Gilead Sciences
EPZICOM® (prescribing information) abacavir slufate and lamivudine GlaxoSmithKline
RETROVIR® (prescribing information) zidovudine (ZDV) GlaxoSmithKline
TRIZIVIR® (prescribing information) abacavir sulfate, lamivudine, and zidovudine GlaxoSmithKline
Truvada®† emtricitabine and tenofovir DF Gilead Sciences
Videx® EC didanosine (ddl) Bristol-Myers Squibb
Viread®† tenofovir disoproxil fumarate Gilead Sciences
Zerit®† stavudine (d4T) Bristol-Myers Squibb
ZIAGEN® (prescribing information) abacavir sulfate GlaxoSmithKline

*Atripla is a combination tablet that contains 2 NRTIs and an NNRTI.

The brands listed above are trademarks of their respective owners and are not trademarks of The GlaxoSmithKline Group of Companies. The makers of these brands are not affiliated with and do not endorse GlaxoSmithKline or its products.

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