Case Presentation: Case 1: A 56 year old female with history of metastatic adenocarcinoma of lung on cycle 1 day 8 of carboplatin/permetrexed/pembrolizumab therapy presented with fever, headache and altered mental status. She was diagnosed with Methicillin resistant Staphylococcus aureus (MRSA) bacteremia and was treated with antibiotics. She presented with potassium levels of 3.4 mmol/l [...]