RE:RE:RE:RE:RE:RE:Sanofi Exploring Acquisition of KRAS Cancer Drugmaker MiratiMiratis’ Krazati currently holds an edge over Amen’s Lumakras in the next phase of KRAS battle. Serious liver toxicity has forced Amgen to essentially abandon a Lumarkas combination with Keytruda, while the side effect appears manageable for Krazati.