По- високите концентрации на тенофовир могат да потенцират нежеланите ефекти на тенофовир, включително бъбречни нарушения.
Caution must also be exercised and reduced doses should be considered if Kaletra is used concurrently with rosuvastatin or with atorvastatin, which is metabolised to a lesser extent by CYP3A4.