Lopinavir + Ritonavir is contraindicated with Rifampicin (listed in the leaflet under its other name, Rifampin, as an antimycobacterial), so the two should not be taken together. The leaflet places Rifampin in a longer list of contraindicated drug groups, which include Alpha 1 Adrenoreceptor Antagonist, HMG-CoA Reductase Inhibitors and PDE5 Enzyme Inhibitor.
These medicines can affect each other in a serious way. Do not start taking them together unless your doctor has said it is OK. If you already take both, do not stop either one on your own: speak to your doctor or pharmacist soon.