Last reviewed · How we verify

Kaletra Tablets

Ottawa Hospital Research Institute · Phase 3 active Small molecule

Kaletra is a combination of lopinavir and ritonavir that inhibits HIV protease to prevent viral replication.

Kaletra is a combination of lopinavir and ritonavir that inhibits HIV protease to prevent viral replication. Used for HIV-1 infection in treatment-naïve and treatment-experienced patients, COVID-19 (investigational use in phase 3 trials).

At a glance

Generic nameKaletra Tablets
SponsorOttawa Hospital Research Institute
Drug classHIV protease inhibitor combination
TargetHIV protease
ModalitySmall molecule
Therapeutic areaInfectious Disease / Virology
PhasePhase 3

Mechanism of action

Lopinavir is an HIV protease inhibitor that blocks the viral protease enzyme required for HIV maturation and infectivity. Ritonavir is a potent protease inhibitor used at sub-therapeutic doses as a pharmacokinetic booster to inhibit cytochrome P450 metabolism, thereby increasing lopinavir plasma concentrations and half-life. Together, they suppress HIV replication and reduce viral load in infected patients.

Approved indications

Common side effects

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results