En afprøvning i mennesker med 14C- lopinavir har vist at 89% af plasmaradioaktiviteten efter en enkelt 400/ 100 mg Kaletra dosis skyldes den aktive modersubstans.
A 14 C-lopinavir study in humans showed that 89% of the plasma radioactivity after a single 400/ 100 mg Kaletra dose was due to parent active substance.