What are the benefits of combination therapy for the treatment of HIV infection?

Updated: Jul 27, 2020
  • Author: Shelley A Gilroy, MD, FACP, FIDSA; Chief Editor: Michael Stuart Bronze, MD  more...
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Combination therapy has been shown to dramatically reduce the likelihood of drug resistance (many drug-resistant mutations are mutually exclusive) and to suppress viral replication to the point that progression to AIDS is significantly slowed. Antiviral-resistance mutations often affect more than one drug simultaneously because of similar development pipelines and the ultimate molecular structure of the drug, and combination choices should account for this possibility.

Ritonavir, a PI that may be used in its own right, boosts blood levels of other PIs. This permits a reduced dosage of the coadministered drug. Various products have been formulated to include PIs combined with ritonavir.

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