Ritonavir, with trade name Norvir® (Abbott Laboratories), is an antiretroviral drug from the protease inhibitor class used to treat HIV infection and AIDS.
Ritonavir is frequently prescribed as the protease inhibitor component in HAART because it inhibits the same host enzyme that metabolizes NRTIs and NNRTIs. This inhibition leads to higher plasma concentrations of these latter drugs, allowing the clinician to lower their dose and frequency.

DrugDigest: Ritonavir ( Norvir ) - Information on dosage, usage, side effects, interactions, and drug comparisons, including generics when available.
Norvir - a.k.a. Ritonavir
Ritonavir - (Norvir)
Ritonavir ( Norvir ) from Abbott Laboratories - Manufacturer's patient and prescribing information for this HIV medicine.